tests/test_list.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2023 Mike Becker, Olaf Wintermann All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "cx/test.h"
#include "util_allocator.h"
#include "cx/compare.h"

#include "cx/array_list.h"
#include "cx/linked_list.h"
#include "cx/kv_list.h"

#include <stdarg.h>
#include <errno.h>

CX_TEST(test_array_add) {
    CX_ARRAY(int, arr);
    cx_array_init(arr, 5);
    arr.data[0] = 2;
    arr.data[1] = 3;
    arr.data[2] = 5;
    arr.data[3] = 7;
    arr.data[4] = 11;
    arr.size = 3;
    arr.capacity = 5;
    int elem = 8, elem2 = 47;
    int result;
    CX_TEST_DO {
        result = cx_array_add(arr, &elem);
        CX_TEST_ASSERT(result == 0);
        CX_TEST_ASSERT(arr.data[0] == 2);
        CX_TEST_ASSERT(arr.data[1] == 3);
        CX_TEST_ASSERT(arr.data[2] == 5);
        CX_TEST_ASSERT(arr.data[3] == 8);
        CX_TEST_ASSERT(arr.data[4] == 11);
        CX_TEST_ASSERT(arr.size == 4);
        CX_TEST_ASSERT(arr.capacity == 5);

        arr.size = 5;
        result = cx_array_add(arr, &elem2);
        CX_TEST_ASSERT(result == 0);
        CX_TEST_ASSERT(arr.data[0] == 2);
        CX_TEST_ASSERT(arr.data[1] == 3);
        CX_TEST_ASSERT(arr.data[2] == 5);
        CX_TEST_ASSERT(arr.data[3] == 8);
        CX_TEST_ASSERT(arr.data[4] == 11);
        CX_TEST_ASSERT(arr.data[5] == 47);
        CX_TEST_ASSERT(arr.size == 6);
        CX_TEST_ASSERT(arr.capacity >= 6);
    }
    cx_array_free(arr);
}

CX_TEST(test_array_copy_overlap) {
    CX_ARRAY_DECLARE_SIZED(char, arr, uint8_t);
    cx_array_initialize(arr, 16);
    strcpy(arr, "Hello, World!");
    CX_TEST_DO {
        errno = 0;
        int result = cx_array_simple_copy(arr, 7, arr, 14);
        CX_TEST_ASSERT(result == 0);
        CX_TEST_ASSERT(errno == 0);
        CX_TEST_ASSERT(arr_size == 21);
        CX_TEST_ASSERT(arr_capacity == 32);
        CX_TEST_ASSERT(0 == memcmp(arr, "Hello, Hello, World!\0", 21));
    }
    cxFreeDefault(arr);
}

CX_TEST(test_array_reserve) {
    {
        // default size
        CX_ARRAY_DECLARE(int, arr);
        cx_array_initialize(arr, 16);
        int result;
        CX_TEST_DO {
            result = cx_array_reserve(
                (void **) &(arr),
                &(arr_size),
                &(arr_capacity),
                0, // default width
                sizeof(int),
                30,
                cx_array_default_reallocator
            );
            CX_TEST_ASSERT(result == 0);
            CX_TEST_ASSERT(arr_size == 0);
            CX_TEST_ASSERT(arr_capacity == 30);
        }
        cxFreeDefault(arr);
    }
    {
        // 16-bit size
        CX_ARRAY_DECLARE_SIZED(char, arr, uint16_t);
        cx_array_initialize(arr, 16);
        arr_size = 5;
        int result;
        CX_TEST_DO {
            errno = 0;
            result = cx_array_simple_reserve(arr, 3);
            CX_TEST_ASSERT(result == 0);
            CX_TEST_ASSERT(errno == 0);
            CX_TEST_ASSERT(arr_size == 5);
            CX_TEST_ASSERT(arr_capacity == 16);

            result = cx_array_simple_reserve(arr, 20);
            CX_TEST_ASSERT(result == 0);
            CX_TEST_ASSERT(errno == 0);
            CX_TEST_ASSERT(arr_size == 5);
            CX_TEST_ASSERT(arr_capacity == 25);

            result = cx_array_simple_reserve(arr, 2000);
            CX_TEST_ASSERT(result == 0);
            CX_TEST_ASSERT(errno == 0);
            CX_TEST_ASSERT(arr_size == 5);
            CX_TEST_ASSERT(arr_capacity == 2005);

            // this does not fit into an array with a 16-bit size
            result = cx_array_simple_reserve(arr, 70000);
            CX_TEST_ASSERT(result == 1);
            CX_TEST_ASSERT(errno == EOVERFLOW);
            CX_TEST_ASSERT(arr_size == 5);
            CX_TEST_ASSERT(arr_capacity == 2005);
        }
        cxFreeDefault(arr);
    }
    {
        // 8-bit size
        CX_ARRAY_DECLARE_SIZED(char, arr, uint8_t);
        cx_array_initialize(arr, 16);
        arr_size = 5;
        int result;
        CX_TEST_DO {
            errno = 0;
            result = cx_array_simple_reserve(arr, 3);
            CX_TEST_ASSERT(result == 0);
            CX_TEST_ASSERT(errno == 0);
            CX_TEST_ASSERT(arr_size == 5);
            CX_TEST_ASSERT(arr_capacity == 16);

            result = cx_array_simple_reserve(arr, 20);
            CX_TEST_ASSERT(result == 0);
            CX_TEST_ASSERT(errno == 0);
            CX_TEST_ASSERT(arr_size == 5);
            CX_TEST_ASSERT(arr_capacity == 25);

            // this does not fit into an array with an 8-bit size
            arr_size = 10;
            result = cx_array_simple_reserve(arr, 250);
            CX_TEST_ASSERT(result == 1);
            CX_TEST_ASSERT(errno == EOVERFLOW);
            CX_TEST_ASSERT(arr_size == 10);
            CX_TEST_ASSERT(arr_capacity == 25);
        }
        cxFreeDefault(arr);
    }
}

CX_TEST(test_array_reserve_unsupported_width) {
    CX_ARRAY_DECLARE_SIZED(int, arr, uint16_t);
    cx_array_initialize(arr, 16);
    int result;
    CX_TEST_DO {
        result = cx_array_reserve(
            (void **) &(arr),
            &(arr_size),
            &(arr_capacity),
            12, // unsupported width
            sizeof(int),
            30,
            cx_array_default_reallocator
        );
        CX_TEST_ASSERT(result != 0);
        CX_TEST_ASSERT(errno == EINVAL);
        CX_TEST_ASSERT(arr_size == 0);
        CX_TEST_ASSERT(arr_capacity == 16);
    }
    cxFreeDefault(arr);
}

CX_TEST(test_array_insert_sorted) {
    int d1 = 50;
    int d2 = 80;
    int d3 = 60;
    int d4 = 40;
    int d5 = 70;
    int d6a[6] = {52, 54, 56, 62, 64, 75};
    int d7a[6] = {51, 57, 58, 65, 77, 78};
    int d8 = 90;
    int d9 = 56;
    int d10a[3] = {67, 75, 90};
    int d11a[6] = {58, 59, 71, 71, 72, 75};
    int d12a[3] = {10, 120, 130};
    int expected[31] = {
            10, 40, 50, 51, 52, 54, 56, 56, 57, 58, 58, 59, 60, 62, 64, 65, 67,
            70, 71, 71, 72, 75, 75, 75, 77, 78, 80, 90, 90, 120, 130
    };

    CX_ARRAY_DECLARE(int, array);
    cx_array_initialize(array, 4);

    CX_TEST_DO {
        CX_TEST_ASSERT(0 == cx_array_simple_add_sorted(array, d1, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 1);
        CX_TEST_ASSERT(array_capacity == 4);
        CX_TEST_ASSERT(0 == cx_array_simple_add_sorted(array, d2, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 2);
        CX_TEST_ASSERT(array_capacity == 4);
        CX_TEST_ASSERT(0 == cx_array_simple_add_sorted(array, d3, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 3);
        CX_TEST_ASSERT(array_capacity == 4);
        CX_TEST_ASSERT(0 == cx_array_simple_add_sorted(array, d4, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 4);
        CX_TEST_ASSERT(array_capacity == 4);
        CX_TEST_ASSERT(0 == cx_array_simple_add_sorted(array, d5, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 5);
        CX_TEST_ASSERT(array_capacity >= 5);
        CX_TEST_ASSERT(0 == cx_array_simple_insert_sorted(array, d6a, 6, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 11);
        CX_TEST_ASSERT(array_capacity >= 11);
        CX_TEST_ASSERT(0 == cx_array_simple_insert_sorted(array, d7a, 6, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 17);
        CX_TEST_ASSERT(array_capacity >= 17);
        CX_TEST_ASSERT(0 == cx_array_simple_add_sorted(array, d8, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 18);
        CX_TEST_ASSERT(array_capacity >= 18);
        CX_TEST_ASSERT(0 == cx_array_simple_add_sorted(array, d9, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 19);
        CX_TEST_ASSERT(array_capacity >= 19);
        CX_TEST_ASSERT(0 == cx_array_simple_insert_sorted(array, d10a, 3, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 22);
        CX_TEST_ASSERT(array_capacity >= 22);
        CX_TEST_ASSERT(0 == cx_array_simple_insert_sorted(array, d11a, 6, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 28);
        CX_TEST_ASSERT(array_capacity >= 28);
        CX_TEST_ASSERT(0 == cx_array_simple_insert_sorted(array, d12a, 3, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 31);
        CX_TEST_ASSERT(array_capacity >= 31);

        CX_TEST_ASSERT(0 == memcmp(array, expected, 31 * sizeof(int)));
    }
    cxFreeDefault(array);
}

CX_TEST(test_array_insert_unique) {
    int d1 = 50;
    int d2 = 80;
    int d3 = 60;
    int d4 = 40;
    int d5 = 70;
    int d6a[6] = {52, 54, 56, 62, 64, 75};
    int d7a[6] = {51, 57, 58, 65, 77, 78};
    int d8 = 90;
    int d9 = 56;
    int d10a[3] = {67, 75, 90};
    int d11a[8] = {90, 90, 90, 95, 95, 100, 110, 110};
    int expected[22] = {
            40, 50, 51, 52, 54, 56, 57, 58, 60, 62, 64,
            65, 67, 70, 75, 77, 78, 80, 90, 95, 100, 110
    };

    CX_ARRAY_DECLARE(int, array);
    cx_array_initialize(array, 4);

    CX_TEST_DO {
        CX_TEST_ASSERT(0 == cx_array_simple_add_unique(array, d1, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 1);
        CX_TEST_ASSERT(array_capacity == 4);
        CX_TEST_ASSERT(0 == cx_array_simple_add_unique(array, d2, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 2);
        CX_TEST_ASSERT(array_capacity == 4);
        CX_TEST_ASSERT(0 == cx_array_simple_add_unique(array, d3, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 3);
        CX_TEST_ASSERT(array_capacity == 4);
        CX_TEST_ASSERT(0 == cx_array_simple_add_unique(array, d4, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 4);
        CX_TEST_ASSERT(array_capacity == 4);
        CX_TEST_ASSERT(0 == cx_array_simple_add_unique(array, d5, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 5);
        CX_TEST_ASSERT(array_capacity >= 5);
        CX_TEST_ASSERT(0 == cx_array_simple_insert_unique(array, d6a, 6, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 11);
        CX_TEST_ASSERT(array_capacity >= 11);
        CX_TEST_ASSERT(0 == cx_array_simple_insert_unique(array, d7a, 6, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 17);
        CX_TEST_ASSERT(array_capacity >= 17);
        CX_TEST_ASSERT(0 == cx_array_simple_add_unique(array, d8, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 18);
        CX_TEST_ASSERT(array_capacity >= 18);
        CX_TEST_ASSERT(0 == cx_array_simple_add_unique(array, d9, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 18);
        CX_TEST_ASSERT(array_capacity >= 18);
        CX_TEST_ASSERT(0 == cx_array_simple_insert_unique(array, d10a, 3, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 19);
        CX_TEST_ASSERT(array_capacity >= 19);
        CX_TEST_ASSERT(0 == cx_array_simple_insert_unique(array, d11a, 8, cx_cmp_int));
        CX_TEST_ASSERT(array_size == 22);
        CX_TEST_ASSERT(array_capacity >= 22);

        CX_TEST_ASSERT(0 == memcmp(array, expected, 22 * sizeof(int)));
    }
    cxFreeDefault(array);
}

CX_TEST(test_array_binary_search) {
    int array[18] = {
            40, 50, 51, 52, 54, 56, 57, 58, 60,
            62, 64, 65, 70, 75, 77, 78, 80, 90
    };

    CX_TEST_DO {
        for (size_t i = 0; i < 18; i++) {
            CX_TEST_ASSERT(i == cx_array_binary_search(array, 18, sizeof(int), &array[i], cx_cmp_int));
        }

        int s = 58;
        CX_TEST_ASSERT(7 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(7 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 60;
        CX_TEST_ASSERT(8 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(8 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 59;
        CX_TEST_ASSERT(7 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(8 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 79;
        CX_TEST_ASSERT(15 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(16 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 66;
        CX_TEST_ASSERT(11 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(12 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 69;
        CX_TEST_ASSERT(11 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(12 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 95;
        CX_TEST_ASSERT(17 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(18 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 30;
        CX_TEST_ASSERT(18 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(0 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));

        // special case - size 0
        s = 40;
        CX_TEST_ASSERT(0 == cx_array_binary_search_inf(array, 0, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(0 == cx_array_binary_search_sup(array, 0, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(0 == cx_array_binary_search(array, 0, sizeof(int), &s, cx_cmp_int));

        // special case - size 1, searched element is smaller
        s = 30;
        CX_TEST_ASSERT(1 == cx_array_binary_search_inf(array, 1, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(0 == cx_array_binary_search_sup(array, 1, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(1 == cx_array_binary_search(array, 1, sizeof(int), &s, cx_cmp_int));

        // special case - size 1, searched element is larger
        s = 50;
        CX_TEST_ASSERT(0 == cx_array_binary_search_inf(array, 1, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(1 == cx_array_binary_search_sup(array, 1, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(1 == cx_array_binary_search(array, 1, sizeof(int), &s, cx_cmp_int));

        // special case - size 1, element matches
        s = 40;
        CX_TEST_ASSERT(0 == cx_array_binary_search_inf(array, 1, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(0 == cx_array_binary_search_sup(array, 1, sizeof(int), &s, cx_cmp_int));
        CX_TEST_ASSERT(0 == cx_array_binary_search(array, 1, sizeof(int), &s, cx_cmp_int));
    }
}

CX_TEST(test_array_binary_search_with_duplicates) {
    int array[18] = {
        40, 50, 55, 55, 55, 57, 57, 58, 60,
        62, 64, 65, 70, 70, 70, 78, 80, 90
    };
    int s;
    CX_TEST_DO {
        // exact matches (largest index on duplicate)
        s = 40;
        CX_TEST_ASSERT(0 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 50;
        CX_TEST_ASSERT(1 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 55;
        CX_TEST_ASSERT(4 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 57;
        CX_TEST_ASSERT(6 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 58;
        CX_TEST_ASSERT(7 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 65;
        CX_TEST_ASSERT(11 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 70;
        CX_TEST_ASSERT(14 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 78;
        CX_TEST_ASSERT(15 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));

        // not found
        s = 30;
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 75;
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 52;
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 100;
        CX_TEST_ASSERT(18 == cx_array_binary_search(array, 18, sizeof(int), &s, cx_cmp_int));

        // infimum
        s = 55; // also yields an exact match
        CX_TEST_ASSERT(4 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 56;
        CX_TEST_ASSERT(4 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 75;
        CX_TEST_ASSERT(14 == cx_array_binary_search_inf(array, 18, sizeof(int), &s, cx_cmp_int));

        // supremum (smallest index)
        s = 52;
        CX_TEST_ASSERT(2 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 66;
        CX_TEST_ASSERT(12 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 75;
        CX_TEST_ASSERT(15 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
        s = 70; // exact match, we want the smallest index
        CX_TEST_ASSERT(12 == cx_array_binary_search_sup(array, 18, sizeof(int), &s, cx_cmp_int));
    }
}

typedef struct node {
    struct node *next;
    struct node *prev;
    int data;
} node;

static int test_cmp_node(const void *l, const void *r) {
    const node *left = l;
    const node *right = r;
    return left->data - right->data;
}

const ptrdiff_t loc_prev = offsetof(struct node, prev);
const ptrdiff_t loc_next = offsetof(struct node, next);
const ptrdiff_t loc_data = offsetof(struct node, data);

static node *create_nodes_test_data(size_t len) {
    node *begin = calloc(1, sizeof(node));
    void *prev = begin;
    for (size_t i = 1; i < len; i++) {
        node *n = calloc(1, sizeof(node));
        cx_linked_list_link(prev, n, loc_prev, loc_next);
        prev = n;
    }
    return begin;
}

void assign_nodes_test_data(node *n, ...) {
    va_list ap;
    va_start(ap, n);
    while (n != NULL) {
        n->data = va_arg(ap, int);
        n = n->next;
    }
    va_end(ap);
}

static void destroy_nodes_test_data(node *n) {
    while (n != NULL) {
        void *next = n->next;
        free(n);
        n = next;
    }
}

static int *int_test_data(size_t len) {
    int *data = malloc(len*sizeof(int));
    for (size_t i = 0 ; i < len ; i++) {
        data[i] = rand(); // NOLINT(*-msc50-cpp)
    }
    return data;
}

CX_TEST(test_linked_list_link_unlink) {
    node a = {0}, b = {0}, c = {0};

    CX_TEST_DO {
        cx_linked_list_link(&a, &b, loc_prev, loc_next);
        CX_TEST_ASSERT(a.prev == NULL);
        CX_TEST_ASSERT(a.next == &b);
        CX_TEST_ASSERT(b.prev == &a);
        CX_TEST_ASSERT(b.next == NULL);

        cx_linked_list_unlink(&a, &b, loc_prev, loc_next);
        CX_TEST_ASSERT(a.prev == NULL);
        CX_TEST_ASSERT(a.next == NULL);
        CX_TEST_ASSERT(b.prev == NULL);
        CX_TEST_ASSERT(b.next == NULL);

        cx_linked_list_link(&b, &c, loc_prev, loc_next);
        cx_linked_list_link(&a, &b, loc_prev, loc_next);
        cx_linked_list_unlink(&b, &c, loc_prev, loc_next);
        CX_TEST_ASSERT(a.prev == NULL);
        CX_TEST_ASSERT(a.next == &b);
        CX_TEST_ASSERT(b.prev == &a);
        CX_TEST_ASSERT(b.next == NULL);
        CX_TEST_ASSERT(c.prev == NULL);
        CX_TEST_ASSERT(c.next == NULL);
    }
}

CX_TEST(test_linked_list_at) {
    node a = {0}, b = {0}, c = {0}, d = {0};

    cx_linked_list_link(&a, &b, loc_prev, loc_next);
    cx_linked_list_link(&b, &c, loc_prev, loc_next);
    cx_linked_list_link(&c, &d, loc_prev, loc_next);

    CX_TEST_DO {
        CX_TEST_ASSERT(cx_linked_list_at(&a, 0, loc_next, 0) == &a);
        CX_TEST_ASSERT(cx_linked_list_at(&a, 0, loc_next, 1) == &b);
        CX_TEST_ASSERT(cx_linked_list_at(&a, 0, loc_next, 2) == &c);
        CX_TEST_ASSERT(cx_linked_list_at(&a, 0, loc_next, 3) == &d);
        CX_TEST_ASSERT(cx_linked_list_at(&a, 0, loc_next, 4) == NULL);
        CX_TEST_ASSERT(cx_linked_list_at(&b, 1, loc_prev, 0) == &a);
        CX_TEST_ASSERT(cx_linked_list_at(&b, 1, loc_next, 1) == &b);
        CX_TEST_ASSERT(cx_linked_list_at(&b, 1, loc_next, 2) == &c);
        CX_TEST_ASSERT(cx_linked_list_at(&b, 1, loc_next, 3) == &d);
        CX_TEST_ASSERT(cx_linked_list_at(&b, 1, loc_next, 4) == NULL);
        CX_TEST_ASSERT(cx_linked_list_at(&d, 3, loc_prev, 0) == &a);
        CX_TEST_ASSERT(cx_linked_list_at(&d, 3, loc_prev, 1) == &b);
    }
}

CX_TEST(test_linked_list_find) {
    node *list = create_nodes_test_data(4);
    assign_nodes_test_data(list, 2, 4, 6, 8);
    CX_TEST_DO {
        size_t i = 10;
        int s;
        s = 2;
        node *n = list;
        CX_TEST_ASSERT(cx_linked_list_find(list, loc_next, loc_data, cx_cmp_int, &s, &i) == n);
        CX_TEST_ASSERT(i == 0);
        n = n->next;
        s = 4;
        CX_TEST_ASSERT(cx_linked_list_find(list, loc_next, loc_data, cx_cmp_int, &s, &i) == n);
        CX_TEST_ASSERT(i == 1);
        n = n->next;
        s = 6;
        CX_TEST_ASSERT(cx_linked_list_find(list, loc_next, loc_data, cx_cmp_int, &s, &i) == n);
        CX_TEST_ASSERT(i == 2);
        n = n->next;
        s = 8;
        CX_TEST_ASSERT(cx_linked_list_find(list, loc_next, loc_data, cx_cmp_int, &s, &i) == n);
        CX_TEST_ASSERT(i == 3);
        s = 10;
        CX_TEST_ASSERT(cx_linked_list_find(list, loc_next, loc_data, cx_cmp_int, &s, &i) == NULL);
        s = -2;
        CX_TEST_ASSERT(cx_linked_list_find(list, loc_next, loc_data, cx_cmp_int, &s, &i) == NULL);
    }
    destroy_nodes_test_data(list);
}

CX_TEST(test_linked_list_compare) {
    void *la = create_nodes_test_data(4);
    void *lb = create_nodes_test_data(3);
    void *lc = create_nodes_test_data(4);
    assign_nodes_test_data(la, 2, 4, 6, 8);
    assign_nodes_test_data(lb, 2, 4, 6);
    assign_nodes_test_data(lc, 2, 4, 6, 9);
    CX_TEST_DO {
        CX_TEST_ASSERT(cx_linked_list_compare(la, lb, loc_next, loc_data, cx_cmp_int) > 0);
        CX_TEST_ASSERT(cx_linked_list_compare(lb, la, loc_next, loc_data, cx_cmp_int) < 0);
        CX_TEST_ASSERT(cx_linked_list_compare(lc, la, loc_next, loc_data, cx_cmp_int) > 0);
        CX_TEST_ASSERT(cx_linked_list_compare(la, lc, loc_next, loc_data, cx_cmp_int) < 0);
        CX_TEST_ASSERT(cx_linked_list_compare(la, la, loc_next, loc_data, cx_cmp_int) == 0);
    }
    destroy_nodes_test_data(la);
    destroy_nodes_test_data(lb);
    destroy_nodes_test_data(lc);
}

CX_TEST(test_linked_list_add) {
    node nodes[4];
    void *begin, *end;
    CX_TEST_DO {
        // test with begin, end / prev, next
        memset(nodes, 0, sizeof(node)*4);
        end = begin = NULL;

        cx_linked_list_add(&begin, &end, loc_prev, loc_next, &nodes[0]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].prev == NULL);
        CX_TEST_ASSERT(nodes[0].next == NULL);

        cx_linked_list_add(&begin, &end, loc_prev, loc_next, &nodes[1]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[1]);
        CX_TEST_ASSERT(nodes[0].next == &nodes[1]);
        CX_TEST_ASSERT(nodes[1].prev == &nodes[0]);

        // test with begin only / prev, next
        memset(nodes, 0, sizeof(node)*4);
        end = begin = NULL;

        cx_linked_list_add(&begin, NULL, loc_prev, loc_next, &nodes[0]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        cx_linked_list_add(&begin, NULL, loc_prev, loc_next, &nodes[1]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].next == &nodes[1]);
        CX_TEST_ASSERT(nodes[1].prev == &nodes[0]);

        cx_linked_list_add(&begin, NULL, loc_prev, loc_next, &nodes[2]);
        CX_TEST_ASSERT(nodes[1].next == &nodes[2]);
        CX_TEST_ASSERT(nodes[2].prev == &nodes[1]);

        // test with end only / prev, next
        memset(nodes, 0, sizeof(node)*4);
        end = begin = NULL;

        cx_linked_list_add(NULL, &end, loc_prev, loc_next, &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[0]);
        cx_linked_list_add(NULL, &end, loc_prev, loc_next, &nodes[1]);
        CX_TEST_ASSERT(end == &nodes[1]);
        CX_TEST_ASSERT(nodes[0].next == &nodes[1]);
        CX_TEST_ASSERT(nodes[1].prev == &nodes[0]);

        cx_linked_list_add(NULL, &end, loc_prev, loc_next, &nodes[2]);
        CX_TEST_ASSERT(end == &nodes[2]);
        CX_TEST_ASSERT(nodes[1].next == &nodes[2]);
        CX_TEST_ASSERT(nodes[2].prev == &nodes[1]);

        // test with begin, end / next
        memset(nodes, 0, sizeof(node)*4);
        end = begin = NULL;

        cx_linked_list_add(&begin, &end, -1, loc_next, &nodes[0]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[0]);
        cx_linked_list_add(&begin, &end, -1, loc_next, &nodes[1]);
        CX_TEST_ASSERT(end == &nodes[1]);
        CX_TEST_ASSERT(nodes[0].next == &nodes[1]);
        CX_TEST_ASSERT(nodes[1].prev == NULL);
    }
}

CX_TEST(test_linked_list_prepend) {
    node nodes[4];
    void *begin, *end;
    CX_TEST_DO {
        // test with begin, end / prev, next
        memset(nodes, 0, sizeof(node) * 4);
        end = begin = NULL;

        cx_linked_list_prepend(&begin, &end, loc_prev, loc_next, &nodes[0]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].prev == NULL);
        CX_TEST_ASSERT(nodes[0].next == NULL);

        cx_linked_list_prepend(&begin, &end, loc_prev, loc_next, &nodes[1]);
        CX_TEST_ASSERT(begin == &nodes[1]);
        CX_TEST_ASSERT(end == &nodes[0]);
        CX_TEST_ASSERT(nodes[1].next == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].prev == &nodes[1]);

        // test with begin only / prev, next
        memset(nodes, 0, sizeof(node) * 4);
        end = begin = NULL;

        cx_linked_list_prepend(&begin, NULL, loc_prev, loc_next, &nodes[0]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        cx_linked_list_prepend(&begin, NULL, loc_prev, loc_next, &nodes[1]);
        CX_TEST_ASSERT(begin == &nodes[1]);
        CX_TEST_ASSERT(nodes[1].next == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].prev == &nodes[1]);

        cx_linked_list_prepend(&begin, NULL, loc_prev, loc_next, &nodes[2]);
        CX_TEST_ASSERT(begin == &nodes[2]);
        CX_TEST_ASSERT(nodes[2].next == &nodes[1]);
        CX_TEST_ASSERT(nodes[1].prev == &nodes[2]);

        // test with end only / prev, next
        memset(nodes, 0, sizeof(node) * 4);
        end = begin = NULL;

        cx_linked_list_prepend(NULL, &end, loc_prev, loc_next, &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[0]);
        cx_linked_list_prepend(NULL, &end, loc_prev, loc_next, &nodes[1]);
        CX_TEST_ASSERT(end == &nodes[0]);
        CX_TEST_ASSERT(nodes[1].next == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].prev == &nodes[1]);

        cx_linked_list_prepend(NULL, &end, loc_prev, loc_next, &nodes[2]);
        CX_TEST_ASSERT(end == &nodes[0]);
        CX_TEST_ASSERT(nodes[2].next == &nodes[1]);
        CX_TEST_ASSERT(nodes[1].prev == &nodes[2]);

        // test with begin, end / next
        memset(nodes, 0, sizeof(node) * 4);
        end = begin = NULL;

        cx_linked_list_prepend(&begin, &end, -1, loc_next, &nodes[0]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[0]);
        cx_linked_list_prepend(&begin, &end, -1, loc_next, &nodes[1]);
        cx_linked_list_prepend(&begin, &end, -1, loc_next, &nodes[2]);
        CX_TEST_ASSERT(begin == &nodes[2]);
        CX_TEST_ASSERT(end == &nodes[0]);
        CX_TEST_ASSERT(nodes[1].next == &nodes[0]);
        CX_TEST_ASSERT(nodes[2].next == &nodes[1]);
        CX_TEST_ASSERT(nodes[1].prev == NULL);
        CX_TEST_ASSERT(nodes[0].prev == NULL);
    }
}

CX_TEST(test_linked_list_insert) {
    node nodes[4];
    void *begin, *end;
    CX_TEST_DO {
        // insert mid list
        memset(nodes, 0, sizeof(node) * 4);
        begin = &nodes[0];
        end = &nodes[2];

        cx_linked_list_link(&nodes[0], &nodes[1], loc_prev, loc_next);
        cx_linked_list_link(&nodes[1], &nodes[2], loc_prev, loc_next);

        cx_linked_list_insert(&begin, &end, loc_prev, loc_next, &nodes[1], &nodes[3]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[2]);
        CX_TEST_ASSERT(nodes[1].next == &nodes[3]);
        CX_TEST_ASSERT(nodes[2].prev == &nodes[3]);
        CX_TEST_ASSERT(nodes[3].prev == &nodes[1]);
        CX_TEST_ASSERT(nodes[3].next == &nodes[2]);

        // insert end
        memset(nodes, 0, sizeof(node) * 4);
        begin = &nodes[0];
        end = &nodes[2];

        cx_linked_list_link(&nodes[0], &nodes[1], loc_prev, loc_next);
        cx_linked_list_link(&nodes[1], &nodes[2], loc_prev, loc_next);

        cx_linked_list_insert(&begin, &end, loc_prev, loc_next, &nodes[2], &nodes[3]);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[3]);
        CX_TEST_ASSERT(nodes[2].next == &nodes[3]);
        CX_TEST_ASSERT(nodes[3].prev == &nodes[2]);
        CX_TEST_ASSERT(nodes[3].next == NULL);

        // insert begin
        memset(nodes, 0, sizeof(node) * 4);
        begin = &nodes[0];
        end = &nodes[2];

        cx_linked_list_link(&nodes[0], &nodes[1], loc_prev, loc_next);
        cx_linked_list_link(&nodes[1], &nodes[2], loc_prev, loc_next);

        cx_linked_list_insert(&begin, &end, loc_prev, loc_next, NULL, &nodes[3]);
        CX_TEST_ASSERT(begin == &nodes[3]);
        CX_TEST_ASSERT(end == &nodes[2]);
        CX_TEST_ASSERT(nodes[0].prev == &nodes[3]);
        CX_TEST_ASSERT(nodes[3].prev == NULL);
        CX_TEST_ASSERT(nodes[3].next == &nodes[0]);
    }
}

CX_TEST(test_linked_list_insert_chain) {
    node nodes[5];
    void *begin, *end;
    CX_TEST_DO {
        // insert mid list
        memset(nodes, 0, sizeof(node) * 5);
        begin = &nodes[0]; end = &nodes[2];

        cx_linked_list_link(&nodes[0], &nodes[1], loc_prev, loc_next);
        cx_linked_list_link(&nodes[1], &nodes[2], loc_prev, loc_next);
        cx_linked_list_link(&nodes[3], &nodes[4], loc_prev, loc_next);

        cx_linked_list_insert_chain(&begin, &end, loc_prev, loc_next, &nodes[1], &nodes[3], NULL);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[2]);
        CX_TEST_ASSERT(nodes[1].next == &nodes[3]);
        CX_TEST_ASSERT(nodes[2].prev == &nodes[4]);
        CX_TEST_ASSERT(nodes[3].prev == &nodes[1]);
        CX_TEST_ASSERT(nodes[4].next == &nodes[2]);

        // insert end
        memset(nodes, 0, sizeof(node) * 5);
        begin = &nodes[0]; end = &nodes[2];

        cx_linked_list_link(&nodes[0], &nodes[1], loc_prev, loc_next);
        cx_linked_list_link(&nodes[1], &nodes[2], loc_prev, loc_next);
        cx_linked_list_link(&nodes[3], &nodes[4], loc_prev, loc_next);

        cx_linked_list_insert_chain(&begin, &end, loc_prev, loc_next, &nodes[2], &nodes[3], NULL);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[4]);
        CX_TEST_ASSERT(nodes[2].next == &nodes[3]);
        CX_TEST_ASSERT(nodes[3].prev == &nodes[2]);
        CX_TEST_ASSERT(nodes[4].next == NULL);

        // insert begin
        memset(nodes, 0, sizeof(node) * 5);
        begin = &nodes[0]; end = &nodes[2];

        cx_linked_list_link(&nodes[0], &nodes[1], loc_prev, loc_next);
        cx_linked_list_link(&nodes[1], &nodes[2], loc_prev, loc_next);
        cx_linked_list_link(&nodes[3], &nodes[4], loc_prev, loc_next);

        cx_linked_list_insert_chain(&begin, &end, loc_prev, loc_next, NULL, &nodes[3], NULL);
        CX_TEST_ASSERT(begin == &nodes[3]);
        CX_TEST_ASSERT(end == &nodes[2]);
        CX_TEST_ASSERT(nodes[0].prev == &nodes[4]);
        CX_TEST_ASSERT(nodes[3].prev == NULL);
        CX_TEST_ASSERT(nodes[4].next == &nodes[0]);
    }
}

CX_TEST(test_linked_list_insert_sorted) {
    node nodes[5] = {0};
    void *begin, *end;
    nodes[0].data = 3;
    nodes[1].data = 6;
    nodes[2].data = 10;
    nodes[3].data = 11;
    nodes[4].data = 15;
    for (unsigned i = 0 ; i < 4 ; i++) {
        cx_linked_list_link(&nodes[i], &nodes[i+1], loc_prev, loc_next);
    }
    begin = &nodes[0];
    end = &nodes[4];
    CX_TEST_DO {
        // insert a single node
        node new_node = {0};
        new_node.data = 5;
        cx_linked_list_insert_sorted(
                &begin, &end,
                loc_prev, loc_next,
                &new_node, test_cmp_node
        );
        CX_TEST_ASSERT(new_node.prev == &nodes[0]);
        CX_TEST_ASSERT(new_node.next == &nodes[1]);
        CX_TEST_ASSERT(nodes[0].next == &new_node);
        CX_TEST_ASSERT(nodes[1].prev == &new_node);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[4]);

        // insert a new beginning node
        node new_begin = {0};
        new_begin.data = 1;
        cx_linked_list_insert_sorted(
                &begin, &end,
                loc_prev, loc_next,
                &new_begin, test_cmp_node
        );
        CX_TEST_ASSERT(new_begin.prev == NULL);
        CX_TEST_ASSERT(new_begin.next == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].prev == &new_begin);
        CX_TEST_ASSERT(begin == &new_begin);
        CX_TEST_ASSERT(end == &nodes[4]);

        // duplicate the beginning node
        // (expectation is that the duplicate is inserted after the first node)
        node new_begin_dup = {0};
        new_begin_dup.data = 1;
        cx_linked_list_insert_sorted(
                &begin, &end,
                loc_prev, loc_next,
                &new_begin_dup, test_cmp_node
        );
        CX_TEST_ASSERT(new_begin_dup.prev == &new_begin);
        CX_TEST_ASSERT(new_begin_dup.next == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].prev == &new_begin_dup);
        CX_TEST_ASSERT(new_begin.next == &new_begin_dup);
        CX_TEST_ASSERT(begin == &new_begin);
        CX_TEST_ASSERT(end == &nodes[4]);

        // now insert a chain
        node chain_start  = {NULL, NULL, 8};
        node chain_mid = {NULL, NULL, 14};
        node chain_end = {NULL, NULL, 17};
        cx_linked_list_link(&chain_start, &chain_mid, loc_prev, loc_next);
        cx_linked_list_link(&chain_mid, &chain_end, loc_prev, loc_next);

        cx_linked_list_insert_sorted_chain(
                &begin, &end,
                loc_prev, loc_next,
                &chain_start, test_cmp_node
        );

        CX_TEST_ASSERT(chain_start.prev == &nodes[1]);
        CX_TEST_ASSERT(chain_start.next == &nodes[2]);
        CX_TEST_ASSERT(chain_mid.prev == &nodes[3]);
        CX_TEST_ASSERT(chain_mid.next == &nodes[4]);
        CX_TEST_ASSERT(chain_end.prev == &nodes[4]);
        CX_TEST_ASSERT(chain_end.next == NULL);
        CX_TEST_ASSERT(begin == &new_begin);
        CX_TEST_ASSERT(end == &chain_end);
    }
}

CX_TEST(test_linked_list_insert_unique) {
    node nodes[5] = {0};
    void *begin, *end;
    nodes[0].data = 3;
    nodes[1].data = 6;
    nodes[2].data = 10;
    nodes[3].data = 11;
    nodes[4].data = 15;
    for (unsigned i = 0 ; i < 4 ; i++) {
        cx_linked_list_link(&nodes[i], &nodes[i+1], loc_prev, loc_next);
    }
    begin = &nodes[0];
    end = &nodes[4];
    CX_TEST_DO {
        // insert a single node
        node new_node = {0};
        new_node.data = 5;
        CX_TEST_ASSERT(0 == cx_linked_list_insert_unique(
                &begin, &end,
                loc_prev, loc_next,
                &new_node, test_cmp_node
        ));
        CX_TEST_ASSERT(new_node.prev == &nodes[0]);
        CX_TEST_ASSERT(new_node.next == &nodes[1]);
        CX_TEST_ASSERT(nodes[0].next == &new_node);
        CX_TEST_ASSERT(nodes[1].prev == &new_node);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[4]);

        // now as duplicate
        node new_node_dup = {0};
        new_node_dup.data = 5;
        CX_TEST_ASSERT(0 != cx_linked_list_insert_unique(
                &begin, &end,
                loc_prev, loc_next,
                &new_node_dup, test_cmp_node
        ));
        CX_TEST_ASSERT(new_node_dup.prev == NULL);
        CX_TEST_ASSERT(new_node_dup.next == NULL);
        CX_TEST_ASSERT(new_node.prev == &nodes[0]);
        CX_TEST_ASSERT(new_node.next == &nodes[1]);
        CX_TEST_ASSERT(nodes[0].next == &new_node);
        CX_TEST_ASSERT(nodes[1].prev == &new_node);
        CX_TEST_ASSERT(begin == &nodes[0]);
        CX_TEST_ASSERT(end == &nodes[4]);

        // insert a new beginning node
        node new_begin = {0};
        new_begin.data = 1;
        CX_TEST_ASSERT(0 == cx_linked_list_insert_unique(
                &begin, &end,
                loc_prev, loc_next,
                &new_begin, test_cmp_node
        ));
        CX_TEST_ASSERT(new_begin.prev == NULL);
        CX_TEST_ASSERT(new_begin.next == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].prev == &new_begin);
        CX_TEST_ASSERT(begin == &new_begin);
        CX_TEST_ASSERT(end == &nodes[4]);

        // now as duplicate
        node new_begin_dup = {0};
        new_begin_dup.data = 1;
        CX_TEST_ASSERT(0 != cx_linked_list_insert_unique(
                &begin, &end,
                loc_prev, loc_next,
                &new_begin_dup, test_cmp_node
        ));
        CX_TEST_ASSERT(new_begin_dup.prev == NULL);
        CX_TEST_ASSERT(new_begin_dup.next == NULL);
        CX_TEST_ASSERT(new_begin.prev == NULL);
        CX_TEST_ASSERT(new_begin.next == &nodes[0]);
        CX_TEST_ASSERT(nodes[0].prev == &new_begin);
        CX_TEST_ASSERT(begin == &new_begin);
        CX_TEST_ASSERT(end == &nodes[4]);

        // now insert a chain with two duplicates
        node chain_start  = {NULL, NULL, 8};
        node chain_mid1 = {NULL, NULL, 11};
        node chain_mid2 = {NULL, NULL, 14};
        node chain_mid3 = {NULL, NULL, 15};
        node chain_mid4 = {NULL, NULL, 15};
        node chain_end = {NULL, NULL, 17};
        cx_linked_list_link(&chain_start, &chain_mid1, loc_prev, loc_next);
        cx_linked_list_link(&chain_mid1, &chain_mid2, loc_prev, loc_next);
        cx_linked_list_link(&chain_mid2, &chain_mid3, loc_prev, loc_next);
        cx_linked_list_link(&chain_mid3, &chain_mid4, loc_prev, loc_next);
        cx_linked_list_link(&chain_mid4, &chain_end, loc_prev, loc_next);

        node *dup_start = cx_linked_list_insert_unique_chain(
                &begin, &end,
                loc_prev, loc_next,
                &chain_start, test_cmp_node
        );

        CX_TEST_ASSERT(chain_start.prev == &nodes[1]);
        CX_TEST_ASSERT(chain_start.next == &nodes[2]);
        CX_TEST_ASSERT(chain_mid2.prev == &nodes[3]);
        CX_TEST_ASSERT(chain_mid2.next == &nodes[4]);
        CX_TEST_ASSERT(chain_end.prev == &nodes[4]);
        CX_TEST_ASSERT(chain_end.next == NULL);
        CX_TEST_ASSERT(begin == &new_begin);
        CX_TEST_ASSERT(end == &chain_end);

        // the duplicates
        CX_TEST_ASSERT(dup_start == &chain_mid1);
        CX_TEST_ASSERT(dup_start->prev == NULL);
        CX_TEST_ASSERT(dup_start->next == &chain_mid3);
        CX_TEST_ASSERT(chain_mid3.prev == &chain_mid1);
        CX_TEST_ASSERT(chain_mid3.next == &chain_mid4);
        CX_TEST_ASSERT(chain_mid4.prev == &chain_mid3);
        CX_TEST_ASSERT(chain_mid4.next == NULL);
    }
}

CX_TEST(test_linked_list_first) {
    node *testdata = create_nodes_test_data(3);
    void *begin = testdata;
    CX_TEST_DO {
        CX_TEST_ASSERT(begin == cx_linked_list_first(testdata, loc_prev));
        CX_TEST_ASSERT(begin == cx_linked_list_first(testdata->next, loc_prev));
        CX_TEST_ASSERT(begin == cx_linked_list_first(testdata->next->next, loc_prev));
    }
    destroy_nodes_test_data(testdata);
}

CX_TEST(test_linked_list_last) {
    node *testdata = create_nodes_test_data(3);
    void *end = testdata->next->next;
    CX_TEST_DO {
        CX_TEST_ASSERT(end == cx_linked_list_last(testdata, loc_next));
        CX_TEST_ASSERT(end == cx_linked_list_last(testdata->next, loc_next));
        CX_TEST_ASSERT(end == cx_linked_list_last(testdata->next->next, loc_next));
    }
    destroy_nodes_test_data(testdata);
}

CX_TEST(test_linked_list_prev) {
    node *testdata = create_nodes_test_data(3);
    CX_TEST_DO {
        CX_TEST_ASSERT(cx_linked_list_prev(testdata, loc_next, testdata) == NULL);
        CX_TEST_ASSERT(cx_linked_list_prev(testdata, loc_next, testdata->next) == testdata);
        CX_TEST_ASSERT(cx_linked_list_prev(testdata, loc_next, testdata->next->next) == testdata->next);
    }
    destroy_nodes_test_data(testdata);
}

CX_TEST(test_linked_list_remove) {
    node *testdata = create_nodes_test_data(3);
    assign_nodes_test_data(testdata, 2, 4, 6);
    node *first = testdata;
    node *second = first->next;
    node *third = second->next;
    void *begin = testdata;
    void *end = third;

    CX_TEST_DO {
        cx_linked_list_remove(&begin, &end, loc_prev, loc_next, second);
        CX_TEST_ASSERT(begin == first);
        CX_TEST_ASSERT(end == third);
        CX_TEST_ASSERT(first->prev == NULL);
        CX_TEST_ASSERT(first->next == third);
        CX_TEST_ASSERT(third->prev == first);
        CX_TEST_ASSERT(third->next == NULL);

        cx_linked_list_remove(&begin, &end, loc_prev, loc_next, third);
        CX_TEST_ASSERT(begin == first);
        CX_TEST_ASSERT(end == first);
        CX_TEST_ASSERT(first->prev == NULL);
        CX_TEST_ASSERT(first->next == NULL);

        cx_linked_list_remove(&begin, &end, loc_prev, loc_next, first);
        CX_TEST_ASSERT(begin == NULL);
        CX_TEST_ASSERT(end == NULL);
    }
    // list is not intact anymore, we have to free nodes individually
    free(first);
    free(second);
    free(third);
}

CX_TEST(test_linked_list_remove_chain) {
    node *testdata = create_nodes_test_data(5);
    assign_nodes_test_data(testdata, 2, 4, 6, 8, 10);
    void *begin = testdata;
    void *end = cx_linked_list_last(testdata, loc_next);
    void *orig_end = end;
    // remember what we need to free
    node *kill_list[5];
    kill_list[0] = testdata;
    for (unsigned i = 1 ; i < 5 ; i++) {
        kill_list[i] = kill_list[i-1]->next;
    }

    CX_TEST_DO {
        // remove chain, but pretend that we don't have a prev pointer!
        size_t result = cx_linked_list_remove_chain(
                &begin, &end, -1, loc_next,
                cx_linked_list_at(begin, 0, loc_next, 2),
                2
        );
        CX_TEST_ASSERT(result == 2);
        CX_TEST_ASSERT(begin == testdata);
        CX_TEST_ASSERT(end == orig_end);
        node *new_idx2 = cx_linked_list_at(begin, 0, loc_next, 2);
        CX_TEST_ASSERT(new_idx2->data == 10);
        CX_TEST_ASSERT(new_idx2->next == NULL);
        // we pretended we don't have prev, so it still points to 8!
        CX_TEST_ASSERT(new_idx2->prev->data == 8);

        // remove last elements and try to remove more than we have
        result = cx_linked_list_remove_chain(
                &begin, &end, -1, loc_next,
                cx_linked_list_at(begin, 0, loc_next, 2),
                2
        );
        CX_TEST_ASSERT(result == 1);
        CX_TEST_ASSERT(begin == testdata);
        CX_TEST_ASSERT(end == testdata->next);
        CX_TEST_ASSERT(NULL == testdata->next->next);
    }

    for (unsigned i = 0 ; i < 5 ; i++) {
        free(kill_list[i]);
    }
}

CX_TEST(test_linked_list_size) {
    node *td5 = create_nodes_test_data(5);
    node *td13 = create_nodes_test_data(13);
    CX_TEST_DO {
        CX_TEST_ASSERT(cx_linked_list_size(NULL, loc_next) == 0);
        CX_TEST_ASSERT(cx_linked_list_size(td5, loc_next) == 5);
        CX_TEST_ASSERT(cx_linked_list_size(td13, loc_next) == 13);
    }
    destroy_nodes_test_data(td5);
    destroy_nodes_test_data(td13);
}

CX_TEST(test_linked_list_sort_empty) {
    void *begin = NULL;
    CX_TEST_DO {
        // cannot assert something, we can just test that it does not crash
        cx_linked_list_sort(&begin, NULL, loc_prev, loc_next, loc_data, cx_cmp_int);
        CX_TEST_ASSERT(true);
    }
}

CX_TEST(test_linked_list_sort) {
    const size_t len = 1500;
    int *testdata = int_test_data(len);
    void *scrambled = create_nodes_test_data(len);
    node *n = scrambled;
    for (size_t i = 0; i < len; i++) {
        n->data = testdata[i];
        n = n->next;
    }
    int *sorted = malloc(len*sizeof(int));
    memcpy(sorted, testdata, len*sizeof(int));
    qsort(sorted, len, sizeof(int), cx_cmp_int);

    void *begin = scrambled;
    void *end = cx_linked_list_last(begin, loc_next);

    CX_TEST_DO {
        cx_linked_list_sort(&begin, &end, loc_prev, loc_next, loc_data, cx_cmp_int);
        node *check = begin;
        node *check_last = NULL;
        for (size_t i = 0; i < len; i++) {
            CX_TEST_ASSERT(check->data == sorted[i]);
            CX_TEST_ASSERT(check->prev == check_last);
            if (i < len - 1) {
                CX_TEST_ASSERT(check->next != NULL);
            }
            check_last = check;
            check = check->next;
        }
        CX_TEST_ASSERT(check == NULL);
        CX_TEST_ASSERT(end == check_last);
    }
    destroy_nodes_test_data(begin);
    free(sorted);
    free(testdata);
}

CX_TEST(test_linked_list_reverse) {
    void *testdata = create_nodes_test_data(4);
    void *expected = create_nodes_test_data(4);
    assign_nodes_test_data(testdata, 2, 4, 6, 8);
    assign_nodes_test_data(expected, 8, 6, 4, 2);
    void *begin = testdata;
    CX_TEST_DO {
        void *end = cx_linked_list_last(begin, loc_next);
        void *orig_begin = begin, *orig_end = end;

        cx_linked_list_reverse(&begin, &end, loc_prev, loc_next);
        CX_TEST_ASSERT(end == orig_begin);
        CX_TEST_ASSERT(begin == orig_end);
        CX_TEST_ASSERT(0 == cx_linked_list_compare(begin, expected, loc_next, loc_data, cx_cmp_int));
    }
    destroy_nodes_test_data(begin);
    destroy_nodes_test_data(expected);
}


CX_TEST(test_empty_list_size) {
    CX_TEST_DO {
        CX_TEST_ASSERT(cxEmptyList->collection.size == 0);
        CX_TEST_ASSERT(cxListSize(cxEmptyList) == 0);
    }
}

CX_TEST(test_empty_list_iterator) {
    CxList *list = cxEmptyList;

    CxIterator it1 = cxListIterator(list);
    CxIterator it2 = cxListBackwardsIterator(list);

    CX_TEST_DO {
        CX_TEST_ASSERT(!cxIteratorValid(it1));
        CX_TEST_ASSERT(!cxIteratorValid(it2));

        int c = 0;
        cx_foreach(void*, data, it1) c++;
        cx_foreach(void*, data, it2) c++;
        CX_TEST_ASSERT(c == 0);
    }
}

CX_TEST(test_null_list_iterator) {
    CxList *list = NULL;

    CxIterator it1 = cxListIterator(list);
    CxIterator it2 = cxListBackwardsIterator(list);
    CxIterator it3 = cxListIteratorAt(list, 0);
    CxIterator it4 = cxListBackwardsIteratorAt(list, 0);

    CX_TEST_DO {
        CX_TEST_ASSERT(!cxIteratorValid(it1));
        CX_TEST_ASSERT(!cxIteratorValid(it2));
        CX_TEST_ASSERT(!cxIteratorValid(it3));
        CX_TEST_ASSERT(!cxIteratorValid(it4));

        int c = 0;
        cx_foreach(void*, data, it1) c++;
        cx_foreach(void*, data, it2) c++;
        cx_foreach(void*, data, it3) c++;
        cx_foreach(void*, data, it4) c++;
        CX_TEST_ASSERT(c == 0);
    }
}

CX_TEST(test_empty_list_noops) {
    CX_TEST_DO {
        CxList copy = *cxEmptyList;
        cxListSort(cxEmptyList);
        cxListClear(cxEmptyList);
        cxListFree(cxEmptyList);
        CX_TEST_ASSERT(0 == memcmp(&copy, cxEmptyList, sizeof(CxList))); // NOLINT(*-suspicious-memory-comparison)
    }
}

CX_TEST(test_empty_list_at) {
    CX_TEST_DO {
        // the placeholder empty list
        CX_TEST_ASSERT(cxListAt(cxEmptyList, 0) == NULL);
        CX_TEST_ASSERT(cxListAt(cxEmptyList, 1) == NULL);
        // a "true" empty list
        CxList *list = cxLinkedListCreate(NULL, sizeof(int));
        CX_TEST_ASSERT(cxListAt(list, 0) == NULL);
        CX_TEST_ASSERT(cxListAt(list, 1) == NULL);
        cxListFree(list);
    }
}

CX_TEST(test_empty_list_find) {
    int x = 42, y = 1337;
    CX_TEST_DO {
        // the placeholder empty list
        CX_TEST_ASSERT(cxListFind(cxEmptyList, &x) == 0);
        CX_TEST_ASSERT(cxListFindRemove(cxEmptyList, &y) == 0);
        // a "true" empty list
        CxList *list = cxLinkedListCreate(NULL, sizeof(int));
        CX_TEST_ASSERT(cxListFind(list, &x) == 0);
        CX_TEST_ASSERT(cxListFindRemove(list, &y) == 0);
        cxListFree(list);
    }
}

CX_TEST(test_empty_list_compare) {
    CxList *empty = cxEmptyList;
    CxList *ll = cxLinkedListCreate(NULL, sizeof(int));
    CxList *al = cxArrayListCreate(NULL, sizeof(int), 8);
    int x = 5;
    CX_TEST_DO {
        CX_TEST_ASSERT(0 == cxListCompare(empty, cxEmptyList));
        CX_TEST_ASSERT(0 == cxListCompare(ll, cxEmptyList));
        CX_TEST_ASSERT(0 == cxListCompare(al, cxEmptyList));
        CX_TEST_ASSERT(0 == cxListCompare(cxEmptyList, ll));
        CX_TEST_ASSERT(0 == cxListCompare(cxEmptyList, al));

        cxListAdd(ll, &x);
        cxListAdd(al, &x);

        CX_TEST_ASSERT(0 < cxListCompare(ll, cxEmptyList));
        CX_TEST_ASSERT(0 < cxListCompare(al, cxEmptyList));
        CX_TEST_ASSERT(0 > cxListCompare(cxEmptyList, ll));
        CX_TEST_ASSERT(0 > cxListCompare(cxEmptyList, al));
    }
    cxListFree(ll);
    cxListFree(al);
}

CX_TEST(test_null_list_free) {
    CX_TEST_DO {
        // cannot really verify, but asan or valgrind would complain
        cxListFree(NULL);
    }
}

CX_TEST(test_list_ll_create) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        CxList *list = cxLinkedListCreate(alloc, sizeof(int));
        CX_TEST_ASSERT(list != NULL);
        cxSetCompareFunc(list, cx_cmp_int);
        CX_TEST_ASSERT(list->collection.elem_size == sizeof(int));
        CX_TEST_ASSERT(list->collection.simple_destructor == NULL);
        CX_TEST_ASSERT(list->collection.advanced_destructor == NULL);
        CX_TEST_ASSERT(list->collection.destructor_data == NULL);
        CX_TEST_ASSERT(cxListSize(list) == 0);
        CX_TEST_ASSERT(list->collection.allocator == alloc);
        CX_TEST_ASSERT(list->collection.cmpfunc == cx_cmp_int);
        CX_TEST_ASSERT(!list->collection.store_pointer);
        cxListFree(list);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_list_ll_create_simple) {
    CxList *list = cxLinkedListCreate(NULL, sizeof(int));
    CX_TEST_DO {
        CX_TEST_ASSERT(list != NULL);
        CX_TEST_ASSERT(list->collection.elem_size == sizeof(int));
        CX_TEST_ASSERT(list->collection.simple_destructor == NULL);
        CX_TEST_ASSERT(list->collection.advanced_destructor == NULL);
        CX_TEST_ASSERT(list->collection.destructor_data == NULL);
        CX_TEST_ASSERT(cxListSize(list) == 0);
        CX_TEST_ASSERT(list->collection.allocator == cxDefaultAllocator);
        CX_TEST_ASSERT(list->collection.cmpfunc == NULL);
        CX_TEST_ASSERT(!list->collection.store_pointer);
    }
    cxListFree(list);
}

CX_TEST(test_list_ll_create_simple_for_pointers) {
    CxList *list = cxLinkedListCreate(NULL, CX_STORE_POINTERS);
    CX_TEST_DO {
        CX_TEST_ASSERT(list != NULL);
        CX_TEST_ASSERT(list->collection.elem_size == sizeof(void*));
        CX_TEST_ASSERT(list->collection.simple_destructor == NULL);
        CX_TEST_ASSERT(list->collection.advanced_destructor == NULL);
        CX_TEST_ASSERT(list->collection.destructor_data == NULL);
        CX_TEST_ASSERT(cxListSize(list) == 0);
        CX_TEST_ASSERT(list->collection.allocator == cxDefaultAllocator);
        CX_TEST_ASSERT(list->collection.cmpfunc == cx_cmp_ptr);
        CX_TEST_ASSERT(list->collection.store_pointer);
    }
    cxListFree(list);
}

CX_TEST(test_list_arl_create) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        CxList *list = cxArrayListCreate(alloc, sizeof(int), 8);
        CX_TEST_ASSERT(list != NULL);
        cxSetCompareFunc(list, cx_cmp_int);
        CX_TEST_ASSERT(list->collection.elem_size == sizeof(int));
        CX_TEST_ASSERT(list->collection.simple_destructor == NULL);
        CX_TEST_ASSERT(list->collection.advanced_destructor == NULL);
        CX_TEST_ASSERT(list->collection.destructor_data == NULL);
        CX_TEST_ASSERT(cxListSize(list) == 0);
        CX_TEST_ASSERT(list->collection.allocator == alloc);
        CX_TEST_ASSERT(list->collection.cmpfunc == cx_cmp_int);
        CX_TEST_ASSERT(!list->collection.store_pointer);
        cxListFree(list);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_list_arl_create_simple) {
    CxList *list = cxArrayListCreate(NULL, sizeof(int), 8);
    CX_TEST_DO {
        CX_TEST_ASSERT(list != NULL);
        CX_TEST_ASSERT(list->collection.elem_size == sizeof(int));
        CX_TEST_ASSERT(list->collection.simple_destructor == NULL);
        CX_TEST_ASSERT(list->collection.advanced_destructor == NULL);
        CX_TEST_ASSERT(list->collection.destructor_data == NULL);
        CX_TEST_ASSERT(cxListSize(list) == 0);
        CX_TEST_ASSERT(list->collection.allocator == cxDefaultAllocator);
        CX_TEST_ASSERT(list->collection.cmpfunc == NULL);
        CX_TEST_ASSERT(!list->collection.store_pointer);
    }
    cxListFree(list);
}

CX_TEST(test_list_arl_create_simple_for_pointers) {
    CxList *list = cxArrayListCreate(NULL, CX_STORE_POINTERS, 8);
    CX_TEST_DO {
        CX_TEST_ASSERT(list != NULL);
        CX_TEST_ASSERT(list->collection.elem_size == sizeof(void*));
        CX_TEST_ASSERT(list->collection.simple_destructor == NULL);
        CX_TEST_ASSERT(list->collection.advanced_destructor == NULL);
        CX_TEST_ASSERT(list->collection.destructor_data == NULL);
        CX_TEST_ASSERT(cxListSize(list) == 0);
        CX_TEST_ASSERT(list->collection.allocator == cxDefaultAllocator);
        CX_TEST_ASSERT(list->collection.cmpfunc == cx_cmp_ptr);
        CX_TEST_ASSERT(list->collection.store_pointer);
    }
    cxListFree(list);
}

static void test_fake_simple_int_destr(void *elem) {
    *(int *) elem = 42;
}

CX_TEST(test_list_pll_destroy_no_destr) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        void *item = cxMalloc(alloc, sizeof(int));
        CxList *list = cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS);
        cxSetCompareFunc(list, cx_cmp_int);
        cxListAdd(list, item);
        CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc));
        cxListFree(list);
        // item is not yet freed
        CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc));
        cxFree(alloc, item);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_list_pll_destroy_simple_destr) {
    CX_TEST_DO {
        int item = 0;
        CxList *list = cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS);
        cxSetCompareFunc(list, cx_cmp_int);
        list->collection.simple_destructor = test_fake_simple_int_destr;
        cxListAdd(list, &item);
        cxListFree(list);
        CX_TEST_ASSERT(item == 42);
    }
}

CX_TEST(test_list_pll_destroy_adv_destr) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        void *item = cxMalloc(alloc, sizeof(int));
        CxList *list = cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS);
        cxSetCompareFunc(list, cx_cmp_int);
        list->collection.destructor_data = alloc;
        list->collection.advanced_destructor = (cx_destructor_func2) cxFree;
        cxListAdd(list, item);
        CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc));
        cxListFree(list);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_list_parl_destroy_no_destr) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        void *item = cxMalloc(alloc, sizeof(int));
        CxList *list = cxArrayListCreate(cxDefaultAllocator, CX_STORE_POINTERS, 4);
        cxSetCompareFunc(list, cx_cmp_int);
        cxListAdd(list, item);
        CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc));
        cxListFree(list);
        // item is not yet freed
        CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc));
        cxFree(alloc, item);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_list_parl_destroy_simple_destr) {
    CX_TEST_DO {
        int item = 0;
        CxList *list = cxArrayListCreate(cxDefaultAllocator, CX_STORE_POINTERS, 4);
        cxSetCompareFunc(list, cx_cmp_int);
        list->collection.simple_destructor = test_fake_simple_int_destr;
        cxListAdd(list, &item);
        cxListFree(list);
        CX_TEST_ASSERT(item == 42);
    }
}

CX_TEST(test_list_parl_destroy_adv_destr) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        void *item = cxMalloc(alloc, sizeof(int));
        CxList *list = cxArrayListCreate(cxDefaultAllocator, CX_STORE_POINTERS, 4);
        cxSetCompareFunc(list, cx_cmp_int);
        list->collection.destructor_data = alloc;
        list->collection.advanced_destructor = (cx_destructor_func2) cxFree;
        cxListAdd(list, item);
        CX_TEST_ASSERT(!cx_testing_allocator_verify(&talloc));
        cxListFree(list);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

#define set_up_combo \
    CxTestingAllocator talloc; \
    cx_testing_allocator_init(&talloc); \
    CxAllocator *alloc = &talloc.base; \
    CX_TEST_DO {
#define tear_down_combo \
        cxListFree(list); \
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));\
    } \
    cx_testing_allocator_destroy(&talloc);
#define roll_out_test_invokers(name) \
CX_TEST(test_list_ll_##name) { \
    set_up_combo \
        CxList *list = cxLinkedListCreate(alloc, sizeof(int)); \
        cxSetCompareFunc(list, cx_cmp_int); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, false); \
    tear_down_combo \
} \
CX_TEST(test_list_arl_##name) { \
    set_up_combo \
        CxList *list = cxArrayListCreate(alloc, sizeof(int), 8); \
        cxSetCompareFunc(list, cx_cmp_int); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, false); \
    tear_down_combo \
} \
CX_TEST(test_list_kvl_##name) { \
    set_up_combo \
        CxList *list = cxKvListCreate(alloc, sizeof(int)); \
        cxSetCompareFunc(list, cx_cmp_int); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, false); \
    tear_down_combo \
} \
CX_TEST(test_list_pll_##name) { \
    set_up_combo \
        CxList *list = cxLinkedListCreate(alloc, CX_STORE_POINTERS); \
        cxSetCompareFunc(list, cx_cmp_int); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, true); \
    tear_down_combo \
} \
CX_TEST(test_list_parl_##name) { \
    set_up_combo \
        CxList *list = cxArrayListCreate(alloc, CX_STORE_POINTERS, 8); \
        cxSetCompareFunc(list, cx_cmp_int); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, true); \
    tear_down_combo \
} \
CX_TEST(test_list_pkvl_##name) { \
    set_up_combo \
        CxList *list = cxKvListCreate(alloc, CX_STORE_POINTERS); \
        cxSetCompareFunc(list, cx_cmp_int); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, true); \
    tear_down_combo \
}
#define roll_out_test_combos(name, body) \
static CX_TEST_SUBROUTINE(test_list_verify_##name, CxList *list, \
    cx_attr_unused bool isptrlist) body \
roll_out_test_invokers(name)

static void set_default_class_funcs(CxList *list, cx_list_class *defaulted_cl) {
    const cx_list_class *cl = list->climpl == NULL ? list->cl : list->climpl;
    memcpy(defaulted_cl, cl, sizeof(cx_list_class));
    defaulted_cl->insert_array = cx_list_default_insert_array;
    defaulted_cl->insert_unique = cx_list_default_insert_unique;
    defaulted_cl->insert_sorted = cx_list_default_insert_sorted;
    defaulted_cl->sort = cx_list_default_sort;
    defaulted_cl->swap = cx_list_default_swap;
    defaulted_cl->compare = NULL;
    if (list->climpl == NULL) {
        list->cl = defaulted_cl;
    } else {
        list->climpl = defaulted_cl;
    }
}

#define do_set_default_class_funcs(list) \
    cx_list_class defaulted_cl; \
    set_default_class_funcs(list, &defaulted_cl)
#define roll_out_test_combos_with_defaulted_funcs(name, body) \
static CX_TEST_SUBROUTINE(test_list_verify_##name, CxList *list, \
    cx_attr_unused bool isptrlist) body \
roll_out_test_invokers(name) \
CX_TEST(test_list_llm_##name) { \
    set_up_combo \
        CxList *list = cxLinkedListCreate(alloc, sizeof(int)); \
        cxSetCompareFunc(list, cx_cmp_int); \
        do_set_default_class_funcs(list); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, false); \
    tear_down_combo \
} \
CX_TEST(test_list_arlm_##name) { \
    set_up_combo \
        CxList *list = cxArrayListCreate(alloc, sizeof(int), 8); \
        cxSetCompareFunc(list, cx_cmp_int); \
        do_set_default_class_funcs(list); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, false); \
    tear_down_combo \
} \
CX_TEST(test_list_pllm_##name) { \
    set_up_combo \
        CxList *list = cxLinkedListCreate(alloc, CX_STORE_POINTERS); \
        cxSetCompareFunc(list, cx_cmp_int); \
        do_set_default_class_funcs(list); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, true); \
    tear_down_combo \
} \
CX_TEST(test_list_parlm_##name) { \
    set_up_combo \
        CxList *list = cxArrayListCreate(alloc, CX_STORE_POINTERS, 8); \
        cxSetCompareFunc(list, cx_cmp_int); \
        do_set_default_class_funcs(list); \
        CX_TEST_CALL_SUBROUTINE(test_list_verify_##name, list, true); \
    tear_down_combo \
}

#define array_init(...) {__VA_ARGS__}

static inline int *int_test_data_added_to_list(CxList *list, bool isptrlist, size_t len) {
    int *testdata = int_test_data(len);
    if (isptrlist) {
        for (size_t i = 0; i < len; i++) {
            cxListAdd(list, &testdata[i]);
        }
    } else {
        cxListAddArray(list, testdata, len);
    }
    return testdata;
}

roll_out_test_combos(add, {
    const size_t len = 250;
    int *testdata = int_test_data(len);
    for (size_t i = 0; i < len; i++) {
        CX_TEST_ASSERT(cxListAdd(list, &testdata[i]) == 0);
    }
    CX_TEST_ASSERT(cxListSize(list) == len);
    for (size_t i = 0; i < len; i++) {
        CX_TEST_ASSERT(*(int *) cxListAt(list, i) == testdata[i]);
    }
    for (size_t i = 0; i < len; i++) {
        ++testdata[i];
    }
    if (isptrlist) {
        for (size_t i = 0; i < len; i++) {
            CX_TEST_ASSERT(*(int *) cxListAt(list, i) == testdata[i]);
        }
    } else {
        for (size_t i = 0; i < len; i++) {
            CX_TEST_ASSERT(*(int *) cxListAt(list, i) == testdata[i] - 1);
        }
    }
    free(testdata);
})

roll_out_test_combos(insert, {
    int a = 5;
    int b = 47;
    int c = 13;
    int d = 42;
    CX_TEST_ASSERT(cxListInsert(list, 1, &a) != 0);
    CX_TEST_ASSERT(cxListSize(list) == 0);
    CX_TEST_ASSERT(cxListInsert(list, 0, &a) == 0);
    CX_TEST_ASSERT(cxListSize(list) == 1);
    CX_TEST_ASSERT(cxListInsert(list, 0, &b) == 0);
    CX_TEST_ASSERT(cxListSize(list) == 2);
    CX_TEST_ASSERT(cxListInsert(list, 1, &c) == 0);
    CX_TEST_ASSERT(cxListSize(list) == 3);
    CX_TEST_ASSERT(cxListInsert(list, 3, &d) == 0);
    CX_TEST_ASSERT(cxListSize(list) == 4);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 0) == 47);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 1) == 13);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 2) == 5);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 3) == 42);
})

roll_out_test_combos(emplace, {
    if (isptrlist) {
        int **x;
        int y = 5;
        int z = 7;
        int w = 13;

        x = cxListEmplace(list);
        CX_TEST_ASSERT(x != NULL);
        CX_TEST_ASSERT(cxListSize(list) == 1);
        *x = &y;
        CX_TEST_ASSERT(*(int*)cxListAt(list, 0) == 5);

        x = cxListEmplace(list);
        CX_TEST_ASSERT(x != NULL);
        CX_TEST_ASSERT(cxListSize(list) == 2);
        *x = &z;
        CX_TEST_ASSERT(*(int*)cxListAt(list, 1) == 7);

        CX_TEST_ASSERT(NULL == cxListEmplaceAt(list, 3));
        CX_TEST_ASSERT(cxListSize(list) == 2);

        x = cxListEmplaceAt(list, 1);
        CX_TEST_ASSERT(x != NULL);
        CX_TEST_ASSERT(cxListSize(list) == 3);
        *x = &w;
        CX_TEST_ASSERT(*(int*)cxListAt(list, 0) == 5);
        CX_TEST_ASSERT(*(int*)cxListAt(list, 1) == 13);
        CX_TEST_ASSERT(*(int*)cxListAt(list, 2) == 7);
    } else {
        int *x;

        x = cxListEmplace(list);
        CX_TEST_ASSERT(x != NULL);
        CX_TEST_ASSERT(cxListSize(list) == 1);
        *x = 5;
        CX_TEST_ASSERT(*(int*)cxListAt(list, 0) == 5);

        x = cxListEmplace(list);
        CX_TEST_ASSERT(x != NULL);
        CX_TEST_ASSERT(cxListSize(list) == 2);
        *x = 7;
        CX_TEST_ASSERT(*(int*)cxListAt(list, 1) == 7);

        CX_TEST_ASSERT(NULL == cxListEmplaceAt(list, 3));
        CX_TEST_ASSERT(cxListSize(list) == 2);

        x = cxListEmplaceAt(list, 1);
        CX_TEST_ASSERT(x != NULL);
        CX_TEST_ASSERT(cxListSize(list) == 3);
        *x = 13;
        CX_TEST_ASSERT(*(int*)cxListAt(list, 0) == 5);
        CX_TEST_ASSERT(*(int*)cxListAt(list, 1) == 13);
        CX_TEST_ASSERT(*(int*)cxListAt(list, 2) == 7);
    }
})

roll_out_test_combos_with_defaulted_funcs(insert_array, {
    int a[5] = array_init(5, 47, 11, 13, 42);
    int b[5] = array_init(9, 18, 72, 50, 7);
    int *aptr[5];
    int *bptr[5];
    for (size_t i = 0; i < 5; i++) {
        aptr[i] = &a[i];
        bptr[i] = &b[i];
    }

    size_t inserted;

    if (isptrlist) {
        inserted = cxListInsertArray(list, 0, aptr, 5);
    } else {
        inserted = cxListInsertArray(list, 0, a, 5);
    }
    CX_TEST_ASSERT(inserted == 5);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 0) == 5);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 1) == 47);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 2) == 11);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 3) == 13);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 4) == 42);
    if (isptrlist) {
        inserted = cxListInsertArray(list, 3, bptr, 5);
    } else {
        inserted = cxListInsertArray(list, 3, b, 5);
    }
    CX_TEST_ASSERT(inserted == 5);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 0) == 5);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 1) == 47);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 2) == 11);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 3) == 9);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 4) == 18);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 5) == 72);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 6) == 50);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 7) == 7);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 8) == 13);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 9) == 42);
})

roll_out_test_combos_with_defaulted_funcs(emplace_array, {
    int a[5] = array_init(5, 47, 11, 13, 42);
    int b[5] = array_init(9, 18, 72, 50, 7);

    CxIterator iter;

    iter = cxListEmplaceArray(list, 5);
    CX_TEST_ASSERT(cxListSize(list) == 5);
    CX_TEST_ASSERT(iter.elem_count == 5);
    CX_TEST_ASSERT(iter.index == 0);
    if (isptrlist) {
        cx_foreach(int **, elem, iter) {
            *elem = a + iter.index;
        }
    } else {
        cx_foreach(int *, elem, iter) {
            *elem = a[iter.index];
        }
    }
    CX_TEST_ASSERT(*(int *) cxListAt(list, 0) == 5);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 1) == 47);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 2) == 11);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 3) == 13);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 4) == 42);
    iter = cxListEmplaceArrayAt(list, 3, 5);
    CX_TEST_ASSERT(cxListSize(list) == 10);
    CX_TEST_ASSERT(iter.elem_count == 5);
    CX_TEST_ASSERT(iter.index == 0);
    if (isptrlist) {
        cx_foreach(int **, elem, iter) {
            *elem = b + iter.index;
        }
    } else {
        cx_foreach(int *, elem, iter) {
            *elem = b[iter.index];
        }
    }
    CX_TEST_ASSERT(*(int *) cxListAt(list, 0) == 5);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 1) == 47);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 2) == 11);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 3) == 9);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 4) == 18);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 5) == 72);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 6) == 50);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 7) == 7);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 8) == 13);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 9) == 42);
})

roll_out_test_combos_with_defaulted_funcs(insert_sorted, {
    int d1 = 50;
    int d2 = 80;
    int d3 = 60;
    int d4 = 40;
    int d5 = 70;
    int d6a[6] = array_init(52, 54, 56, 62, 64, 75);
    int d7a[6] = array_init(51, 57, 58, 65, 77, 78);
    int d8 = 90;
    int d9 = 56;
    int d10a[3] = array_init(67, 75, 90);
    int *d6ptr[6];
    int *d7ptr[6];
    int *d10ptr[3];
    for (size_t i = 0; i < 6; i++) {
        d6ptr[i] = &d6a[i];
        d7ptr[i] = &d7a[i];
    }
    for (size_t i = 0 ; i < 3 ; i++) {
        d10ptr[i] = &d10a[i];
    }
    size_t inserted;
    int expected[22] = array_init(
        40, 50, 51, 52, 54, 56, 56, 57, 58, 60,
        62, 64, 65, 67, 70, 75, 75, 77, 78, 80, 90, 90
    );

    CX_TEST_ASSERT(0 == cxListInsertSorted(list, &d1));
    CX_TEST_ASSERT(0 == cxListInsertSorted(list, &d2));
    CX_TEST_ASSERT(0 == cxListInsertSorted(list, &d3));
    CX_TEST_ASSERT(0 == cxListInsertSorted(list, &d4));
    CX_TEST_ASSERT(0 == cxListInsertSorted(list, &d5));
    if (isptrlist) {
        inserted = cxListInsertSortedArray(list, d6ptr, 6);
    } else {
        inserted = cxListInsertSortedArray(list, d6a, 6);
    }
    CX_TEST_ASSERT(inserted == 6);
    if (isptrlist) {
        inserted = cxListInsertSortedArray(list, d7ptr, 6);
    } else {
        inserted = cxListInsertSortedArray(list, d7a, 6);
    }
    CX_TEST_ASSERT(inserted == 6);
    CX_TEST_ASSERT(0 == cxListInsertSorted(list, &d8));
    CX_TEST_ASSERT(0 == cxListInsertSorted(list, &d9));
    if (isptrlist) {
        inserted = cxListInsertSortedArray(list, d10ptr, 3);
    } else {
        inserted = cxListInsertSortedArray(list, d10a, 3);
    }
    CX_TEST_ASSERT(inserted == 3);
    CX_TEST_ASSERT(cxListSize(list) == 22);
    for (size_t i = 0; i < 22; i++) {
        CX_TEST_ASSERT(*(int *) cxListAt(list, i) == expected[i]);
    }
})

roll_out_test_combos_with_defaulted_funcs(insert_unique, {
    int d1 = 50;
    int d2 = 80;
    int d3 = 60;
    int d4 = 40;
    int d5 = 70;
    int d6a[8] = array_init(52, 54, 56, 56, 62, 62, 64, 75);
    int d7a[8] = array_init(51, 51, 57, 58, 65, 77, 78, 78);
    int d8 = 90;
    int d9 = 56;
    int d10a[5] = array_init(58, 58, 67, 75, 90);
    int *d6ptr[8];
    int *d7ptr[8];
    int *d10ptr[5];
    for (size_t i = 0; i < 8; i++) {
        d6ptr[i] = &d6a[i];
        d7ptr[i] = &d7a[i];
    }
    for (size_t i = 0 ; i < 5 ; i++) {
        d10ptr[i] = &d10a[i];
    }
    size_t processed;
    int expected[19] = array_init(
        40, 50, 51, 52, 54, 56, 57, 58, 60,
        62, 64, 65, 67, 70, 75, 77, 78, 80, 90
    );

    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d1));
    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d2));
    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d3));
    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d4));
    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d5));
    if (isptrlist) {
        processed = cxListInsertUniqueArray(list, d6ptr, 8);
    } else {
        processed = cxListInsertUniqueArray(list, d6a, 8);
    }
    CX_TEST_ASSERT(processed == 8);
    if (isptrlist) {
        processed = cxListInsertUniqueArray(list, d7ptr, 8);
    } else {
        processed = cxListInsertUniqueArray(list, d7a, 8);
    }
    CX_TEST_ASSERT(processed == 8);
    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d8));
    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d9));
    if (isptrlist) {
        processed = cxListInsertUniqueArray(list, d10ptr, 5);
    } else {
        processed = cxListInsertUniqueArray(list, d10a, 5);
    }
    CX_TEST_ASSERT(processed == 5);
    CX_TEST_ASSERT(cxListSize(list) == 19);
    for (size_t i = 0; i < 19; i++) {
        CX_TEST_ASSERT(*(int *) cxListAt(list, i) == expected[i]);
    }
})

roll_out_test_combos_with_defaulted_funcs(insert_unique_not_sorted, {
    int d1 = 50;
    int d2 = 80;
    int d3 = 60;
    int d4 = 40;
    int d5 = 70;
    int d6a[6] = array_init(52, 54, 56, 62, 64, 75);
    int d7a[6] = array_init(51, 57, 58, 65, 77, 78);
    int d8 = 90;
    int d9 = 56;
    int d10a[3] = array_init(67, 75, 90);
    int *d6ptr[6];
    int *d7ptr[6];
    int *d10ptr[3];
    for (size_t i = 0; i < 6; i++) {
        d6ptr[i] = &d6a[i];
        d7ptr[i] = &d7a[i];
    }
    for (size_t i = 0 ; i < 3 ; i++) {
        d10ptr[i] = &d10a[i];
    }
    size_t inserted;
    int expected[19] = array_init(
        50, 80, 60, 40, 70, 52, 54, 56, 62, 64,
        75, 51, 57, 58, 65, 77, 78, 90, 67
    );

    // begin with an unsorted list!
    CX_TEST_ASSERT(0 == cxListAdd(list, &d1));
    CX_TEST_ASSERT(0 == cxListAdd(list, &d2));
    CX_TEST_ASSERT(0 == cxListAdd(list, &d3));
    CX_TEST_ASSERT(0 == cxListAdd(list, &d4));

    // not start adding unique items
    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d5));
    if (isptrlist) {
        inserted = cxListInsertUniqueArray(list, d6ptr, 6);
    } else {
        inserted = cxListInsertUniqueArray(list, d6a, 6);
    }
    CX_TEST_ASSERT(inserted == 6);
    if (isptrlist) {
        inserted = cxListInsertUniqueArray(list, d7ptr, 6);
    } else {
        inserted = cxListInsertUniqueArray(list, d7a, 6);
    }
    CX_TEST_ASSERT(inserted == 6);
    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d8));
    CX_TEST_ASSERT(0 == cxListInsertUnique(list, &d9));
    if (isptrlist) {
        inserted = cxListInsertUniqueArray(list, d10ptr, 3);
    } else {
        inserted = cxListInsertUniqueArray(list, d10a, 3);
    }
    CX_TEST_ASSERT(inserted == 3);
    CX_TEST_ASSERT(cxListSize(list) == 19);
    for (size_t i = 0; i < 19; i++) {
        CX_TEST_ASSERT(*(int *) cxListAt(list, i) == expected[i]);
    }
})

roll_out_test_combos(remove, {
    const size_t testdata_len = 32;
    int *testdata = int_test_data_added_to_list(list, isptrlist, testdata_len);

    CX_TEST_ASSERT(cxListRemove(list, 2) == 0);
    CX_TEST_ASSERT(cxListRemove(list, 4) == 0);
    CX_TEST_ASSERT(cxListSize(list) == testdata_len - 2);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 0) == testdata[0]);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 1) == testdata[1]);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 2) == testdata[3]);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 3) == testdata[4]);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 4) == testdata[6]);
    CX_TEST_ASSERT(cxListRemove(list, 0) == 0);
    CX_TEST_ASSERT(cxListSize(list) == testdata_len - 3);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 0) == testdata[1]);
    CX_TEST_ASSERT(*(int *) cxListAt(list, 1) == testdata[3]);
    CX_TEST_ASSERT(cxListRemove(list, testdata_len) != 0);
    free(testdata);
})

roll_out_test_combos(remove_and_get, {
    int testdata[10];
    for (unsigned i = 0 ; i < 10 ; i++) {
        testdata[i] = 2*i;
        cxListAdd(list, &testdata[i]);
    }
    if (isptrlist) {
        int *x;
        CX_TEST_ASSERT(cxListPop(list, &x) == 0);
        CX_TEST_ASSERT(*x == 18);
        CX_TEST_ASSERT(cxListPop(list, &x) == 0);
        CX_TEST_ASSERT(*x == 16);
        CX_TEST_ASSERT(cxListPopFront(list, &x) == 0);
        CX_TEST_ASSERT(*x == 0);
        CX_TEST_ASSERT(cxListPopFront(list, &x) == 0);
        CX_TEST_ASSERT(*x == 2);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 3, &x) == 0);
        CX_TEST_ASSERT(*x == 10);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 3, &x) == 0);
        CX_TEST_ASSERT(*x == 12);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 8, &x) != 0);
        CX_TEST_ASSERT(*x == 12);

        *x = 1337;
        cxListClear(list);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 0, &x) != 0);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 1, &x) != 0);
        CX_TEST_ASSERT(cxListPop(list, &x) != 0);
        CX_TEST_ASSERT(cxListPopFront(list, &x) != 0);
        CX_TEST_ASSERT(*x == 1337);
    } else {
        int x;
        CX_TEST_ASSERT(cxListPop(list, &x) == 0);
        CX_TEST_ASSERT(x == 18);
        CX_TEST_ASSERT(cxListPop(list, &x) == 0);
        CX_TEST_ASSERT(x == 16);
        CX_TEST_ASSERT(cxListPopFront(list, &x) == 0);
        CX_TEST_ASSERT(x == 0);
        CX_TEST_ASSERT(cxListPopFront(list, &x) == 0);
        CX_TEST_ASSERT(x == 2);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 3, &x) == 0);
        CX_TEST_ASSERT(x == 10);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 3, &x) == 0);
        CX_TEST_ASSERT(x == 12);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 8, &x) != 0);
        CX_TEST_ASSERT(x == 12);

        x = 1337;
        cxListClear(list);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 0, &x) != 0);
        CX_TEST_ASSERT(cxListRemoveAndGet(list, 1, &x) != 0);
        CX_TEST_ASSERT(cxListPop(list, &x) != 0);
        CX_TEST_ASSERT(cxListPopFront(list, &x) != 0);
        CX_TEST_ASSERT(x == 1337);
    }
})

static unsigned test_remove_array_destr_ctr;
static void test_remove_array_destr(cx_attr_unused void *d) {
    test_remove_array_destr_ctr++;
}

roll_out_test_combos(remove_array, {
    const size_t testdata_len = 32;
    int *testdata = int_test_data_added_to_list(list, isptrlist, testdata_len);
    cxSetDestructor(list, test_remove_array_destr);
    test_remove_array_destr_ctr = 0;

    // first, remove and get - no destructor must be called
    int targete[8];
    int *targetp[8];
    memset(targete, 0, sizeof(targete));
    memset(targetp, 0, sizeof(targetp));
    void *target = isptrlist ? (void*) targetp : targete;
    CX_TEST_ASSERT(8 == cxListRemoveArrayAndGet(list, 8, 8, target));
    CX_TEST_ASSERT(0 == test_remove_array_destr_ctr);
    CX_TEST_ASSERT(24 == cxListSize(list));
    for (unsigned int i = 0 ; i < 8 ; i++) {
        CX_TEST_ASSERT((*(int*)cxListAt(list, i)) == testdata[i]);
    }
    for (unsigned int i = 8 ; i < 24 ; i++) {
        CX_TEST_ASSERT((*(int*)cxListAt(list, i)) == testdata[8+i]);
    }
    for (unsigned int i = 0 ; i < 8 ; i++) {
        if (isptrlist) {
            CX_TEST_ASSERT(targetp[i] == &testdata[8 + i]);
        } else {
            CX_TEST_ASSERT(targete[i] == testdata[8 + i]);
        }
    }

    // now, just remove - destructor must be called
    CX_TEST_ASSERT(8 == cxListRemoveArray(list, 8, 8));
    CX_TEST_ASSERT(8 == test_remove_array_destr_ctr);
    CX_TEST_ASSERT(16 == cxListSize(list));
    for (unsigned int i = 0 ; i < 8 ; i++) {
        CX_TEST_ASSERT((*(int*)cxListAt(list, i)) == testdata[i]);
    }
    for (unsigned int i = 8 ; i < 16 ; i++) {
        CX_TEST_ASSERT((*(int*)cxListAt(list, i)) == testdata[16+i]);
    }

    // finally, remove and get out of bounds
    test_remove_array_destr_ctr = 0;
    memset(targete, 0, sizeof(targete));
    memset(targetp, 0, sizeof(targetp));
    CX_TEST_ASSERT(4 == cxListRemoveArrayAndGet(list, 12, 8, target));
    CX_TEST_ASSERT(0 == test_remove_array_destr_ctr);
    CX_TEST_ASSERT(12 == cxListSize(list));
    for (unsigned int i = 0 ; i < 8 ; i++) {
        CX_TEST_ASSERT((*(int*)cxListAt(list, i)) == testdata[i]);
    }
    for (unsigned int i = 8 ; i < 12 ; i++) {
        CX_TEST_ASSERT((*(int*)cxListAt(list, i)) == testdata[16+i]);
    }
    for (unsigned int i = 0 ; i < 4 ; i++) {
        if (isptrlist) {
            CX_TEST_ASSERT(targetp[i] == &testdata[28 + i]);
        } else {
            CX_TEST_ASSERT(targete[i] == testdata[28 + i]);
        }
    }
    for (unsigned int i = 4 ; i < 8 ; i++) {
        if (isptrlist) {
            CX_TEST_ASSERT(targetp[i] == NULL);
        } else {
            CX_TEST_ASSERT(targete[i] == 0);
        }
    }

    free(testdata);
})

roll_out_test_combos(find_remove, {
    const size_t testdata_len = 250;
    int *testdata = int_test_data_added_to_list(list, isptrlist, testdata_len);

    unsigned exp = rand() % testdata_len; // NOLINT(cert-msc50-cpp)
    int val = testdata[exp];
    // randomly picked number could occur earlier in list - find first position
    for (unsigned i = 0 ; i < exp ; i++) {
        if (testdata[i] == val) {
            exp = i;
            break;
        }
    }
    CX_TEST_ASSERT(cxListSize(list) == testdata_len);
    CX_TEST_ASSERT(cxListFind(list, &val) == exp);
    CX_TEST_ASSERT(cxListFindRemove(list, &val) == exp);
    CX_TEST_ASSERT(cxListSize(list) == testdata_len - 1);
    CX_TEST_ASSERT(cxListFind(list, &val) != exp);

    int notinlist = -1;
    CX_TEST_ASSERT(cxListFindRemove(list, &notinlist) == cxListSize(list));
    CX_TEST_ASSERT(cxListSize(list) == testdata_len - 1);

    free(testdata);
})

roll_out_test_combos(find_remove_sorted, {
    const size_t testdata_len = 250;
    int *testdata = int_test_data_added_to_list(list, isptrlist, testdata_len);
    qsort(testdata, testdata_len, sizeof(int), cx_cmp_int);
    cxListSort(list);

    unsigned exp = rand() % testdata_len; // NOLINT(cert-msc50-cpp)
    int val = testdata[exp];
    // randomly picked number could occur earlier in list - find first position
    for (unsigned i = 0 ; i < exp ; i++) {
        if (testdata[i] == val) {
            exp = i;
            break;
        }
    }
    CX_TEST_ASSERT(cxListSize(list) == testdata_len);
    CX_TEST_ASSERT(cxListFind(list, &val) == exp);
    CX_TEST_ASSERT(cxListFindRemove(list, &val) == exp);
    CX_TEST_ASSERT(cxListSize(list) == testdata_len - 1);
    CX_TEST_ASSERT(cxListFind(list, &val) != exp);

    int notinlist = -1;
    CX_TEST_ASSERT(cxListFindRemove(list, &notinlist) == cxListSize(list));
    CX_TEST_ASSERT(cxListSize(list) == testdata_len - 1);

    free(testdata);
})

roll_out_test_combos(contains, {
    int a = 37;
    int b = 42;
    int c = 55;
    cxListAdd(list, &a);
    cxListAdd(list, &b);
    cxListAdd(list, &c);
    int x;
    x = 37;
    CX_TEST_ASSERT(cxListContains(list, &x));
    x = 42;
    CX_TEST_ASSERT(cxListContains(list, &x));
    x = 55;
    CX_TEST_ASSERT(cxListContains(list, &x));
    x = 47;
    CX_TEST_ASSERT(!cxListContains(list, &x));
})

roll_out_test_combos(clear, {
    int *testdata = int_test_data_added_to_list(list, isptrlist, 8);
    CX_TEST_ASSERT(cxListSize(list) > 0);
    cxListClear(list);
    CX_TEST_ASSERT(cxListSize(list) == 0);
    free(testdata);
})

roll_out_test_combos(at, {
    size_t len = 128;
    int *testdata = int_test_data_added_to_list(list, isptrlist, 128);
    CX_TEST_ASSERT(cxListSize(list) == len);
    for (size_t i = 0; i < len; i++) {
        CX_TEST_ASSERT(cxListIndexValid(list, i));
        CX_TEST_ASSERT(*(int *) cxListAt(list, i) == testdata[i]);
    }
    CX_TEST_ASSERT(!cxListIndexValid(list, len));
    CX_TEST_ASSERT(cxListAt(list, len) == NULL);
    free(testdata);
})

roll_out_test_combos(set, {
    // Add some values
    int v1 = 42;
    cxListAdd(list, &v1);
    int v2 = 100;
    cxListAdd(list, &v2);
    int v3 = 47;
    cxListAdd(list, &v3);

    // Change the first element
    int v1new = 99;
    CX_TEST_ASSERT(cxListSet(list, 0, &v1new) == 0);
    CX_TEST_ASSERT(*(int *) cxListFirst(list) == 99);

    // Change the last element
    int v3new = 101;
    CX_TEST_ASSERT(cxListSet(list, 2, &v3new) == 0);
    CX_TEST_ASSERT(*(int *) cxListLast(list) == 101);

    // Try index out of bounds
    int oob = 1337;
    CX_TEST_ASSERT(cxListSet(list, 3, &oob) != 0);
})

roll_out_test_combos_with_defaulted_funcs(swap, {
    int original[16] = array_init(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
    int swapped[16] = array_init(8, 4, 14, 3, 1, 5, 9, 12, 0, 6, 11, 10, 7, 15, 2, 13);

    for (size_t i = 0; i < 16; i++) {
        cxListAdd(list, &original[i]);
    }

    CX_TEST_ASSERT(0 == cxListSwap(list, 1, 4));
    CX_TEST_ASSERT(0 == cxListSwap(list, 2, 14));
    CX_TEST_ASSERT(0 == cxListSwap(list, 9, 6));
    CX_TEST_ASSERT(0 == cxListSwap(list, 3, 3));
    CX_TEST_ASSERT(0 == cxListSwap(list, 10, 11));
    CX_TEST_ASSERT(0 == cxListSwap(list, 8, 0));
    CX_TEST_ASSERT(0 == cxListSwap(list, 7, 12));
    CX_TEST_ASSERT(0 == cxListSwap(list, 13, 15));

    CX_TEST_ASSERT(0 != cxListSwap(list, 5, 16));
    CX_TEST_ASSERT(0 != cxListSwap(list, 16, 6));
    CX_TEST_ASSERT(0 != cxListSwap(list, 16, 17));

    CxIterator iter = cxListIterator(list);
    cx_foreach(int*, e, iter) {
        CX_TEST_ASSERT(*e == swapped[iter.index]);
    }
    iter = cxListBackwardsIterator(list);
    cx_foreach(int*, e, iter) {
        CX_TEST_ASSERT(*e == swapped[iter.index]);
    }
})

CX_TEST(test_list_arl_swap_no_sbo) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *alloc = &talloc.base;
    CX_TEST_DO {
        size_t item_size = 2*cx_array_swap_sbo_size;
        CxList *list = cxArrayListCreate(alloc, item_size, 8);
        cxSetCompareFunc(list, cx_cmp_int);

        char *obj = malloc(item_size);
        for (char c = 'a' ; c <= 'z' ; c++) {
            obj[0] = c;
            obj[item_size-1] = c;
            cxListAdd(list, obj);
        }
        free(obj);

        CX_TEST_ASSERT(((char*)cxListAt(list, 3))[0] == 'd');
        CX_TEST_ASSERT(((char*)cxListAt(list, 17))[0] == 'r');
        CX_TEST_ASSERT(((char*)cxListAt(list, 3))[item_size-1] == 'd');
        CX_TEST_ASSERT(((char*)cxListAt(list, 17))[item_size-1] == 'r');
        cxListSwap(list, 3, 17);
        CX_TEST_ASSERT(((char*)cxListAt(list, 17))[0] == 'd');
        CX_TEST_ASSERT(((char*)cxListAt(list, 3))[0] == 'r');
        CX_TEST_ASSERT(((char*)cxListAt(list, 17))[item_size-1] == 'd');
        CX_TEST_ASSERT(((char*)cxListAt(list, 3))[item_size-1] == 'r');

        cxListFree(list);
        CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    }
    cx_testing_allocator_destroy(&talloc);
}

roll_out_test_combos(find, {
    const size_t testdata_len = 500;
    int *testdata = int_test_data_added_to_list(list, isptrlist, testdata_len);

    for (size_t attempt = 0; attempt < 25; attempt++) {
        unsigned exp = rand() % testdata_len; // NOLINT(cert-msc50-cpp)
        int val = testdata[exp];
        // randomly picked number could occur earlier in list - find first position
        for (unsigned i = 0 ; i < exp ; i++) {
            if (testdata[i] == val) {
                exp = i;
                break;
            }
        }
        CX_TEST_ASSERT(cxListFind(list, &val) == exp);
    }

    int notinlist = -1;
    CX_TEST_ASSERT(cxListFind(list, &notinlist) == cxListSize(list));

    free(testdata);
})

roll_out_test_combos_with_defaulted_funcs(sort, {
    const size_t testdata_len = 250;
    int *testdata = int_test_data_added_to_list(list, isptrlist, testdata_len);
    int *expected = malloc(testdata_len*sizeof(int));
    memcpy(expected, testdata, testdata_len*sizeof(int));
    qsort(expected, testdata_len, sizeof(int), cx_cmp_int);

    cxListSort(list);
    for (size_t i = 0; i < testdata_len; i++) {
        CX_TEST_ASSERT(*(int *) cxListAt(list, i) == expected[i]);
    }

    free(expected);
    free(testdata);
})

roll_out_test_combos(reverse, {
    const size_t testdata_len = 50;
    int *testdata = int_test_data_added_to_list(list, isptrlist, testdata_len);
    cxListReverse(list);
    for (size_t i = 0; i < testdata_len; i++) {
        CX_TEST_ASSERT(*(int *) cxListAt(list, i) == testdata[testdata_len - 1 - i]);
    }
    free(testdata);
})

roll_out_test_combos(iterator, {
    const size_t len = 50;
    int *testdata = int_test_data_added_to_list(list, isptrlist, len);

    CxIterator iter = cxListIterator(list);
    CX_TEST_ASSERT(iter.elem_size == list->collection.elem_size);
    CX_TEST_ASSERT(iter.elem_count == list->collection.size);
    size_t i = 0;
    cx_foreach(int*, x, iter) {
        CX_TEST_ASSERT(i == iter.index);
        CX_TEST_ASSERT(*x == testdata[iter.index]);
        i++;
    }
    CX_TEST_ASSERT(i == cxListSize(list));
    iter = cxListBackwardsIterator(list);
    cx_foreach(int*, x, iter) {
        CX_TEST_ASSERT(i - 1 == iter.index);
        CX_TEST_ASSERT(*x == testdata[iter.index]);
        i--;
    }
    CX_TEST_ASSERT(i == 0);
    i = len / 2;
    CxIterator mut_iter = cxListIteratorAt(list, i);
    CX_TEST_ASSERT(mut_iter.elem_size == list->collection.elem_size);
    CX_TEST_ASSERT(mut_iter.elem_count == list->collection.size);
    size_t j = 0;
    cx_foreach(int*, x, mut_iter) {
        CX_TEST_ASSERT(mut_iter.index == len / 2 + j / 2);
        CX_TEST_ASSERT(*x == testdata[i]);
        if (i % 2 == 1) cxIteratorFlagRemoval(mut_iter);
        i++;
        j++;
    }
    CX_TEST_ASSERT(i == len);
    i = len / 2;
    j = 0;
    mut_iter = cxListBackwardsIteratorAt(list, i - 1);
    cx_foreach(int*, x, mut_iter) {
        CX_TEST_ASSERT(mut_iter.index == len / 2 - 1 - j);
        CX_TEST_ASSERT(*x == testdata[i - 1]);
        if (i % 2 == 0) cxIteratorFlagRemoval(mut_iter);
        i--;
        j++;
    }
    CX_TEST_ASSERT(i == 0);
    CX_TEST_ASSERT(cxListSize(list) == len / 2);
    CX_TEST_ASSERT(mut_iter.elem_count == len / 2);
    for (size_t k = 0; k < len / 2; k++) {
        CX_TEST_ASSERT(*(int *) cxListAt(list, k) == testdata[k * 2]);
    }

    free(testdata);
})

roll_out_test_combos(insert_with_iterator, {
    int fivenums[] = array_init(0, 1, 2, 3, 4);
    for (size_t i = 0; i < 5; i++) {
        cxListAdd(list, &fivenums[i]);
    }
    int newdata[] = array_init(10, 20, 30, 40, 50);

    CxIterator iter = cxListIteratorAt(list, 2);
    CX_TEST_ASSERT(cxIteratorValid(iter));
    CX_TEST_ASSERT(iter.index == 2);
    CX_TEST_ASSERT(*(int *) cxIteratorCurrent(iter) == 2);
    CX_TEST_ASSERT(iter.elem_count == 5);
    cxListInsertAfter(&iter, &newdata[0]);
    CX_TEST_ASSERT(cxIteratorValid(iter));
    CX_TEST_ASSERT(iter.index == 2);
    CX_TEST_ASSERT(*(int *) cxIteratorCurrent(iter) == 2);
    CX_TEST_ASSERT(iter.elem_count == 6);
    cxListInsertBefore(&iter, &newdata[1]);
    CX_TEST_ASSERT(cxIteratorValid(iter));
    CX_TEST_ASSERT(iter.index == 3);
    CX_TEST_ASSERT(*(int *) cxIteratorCurrent(iter) == 2);
    CX_TEST_ASSERT(iter.elem_count == 7);

    iter = cxListIterator(list);
    cxListInsertBefore(&iter, &newdata[2]);
    CX_TEST_ASSERT(cxIteratorValid(iter));
    CX_TEST_ASSERT(iter.index == 1);
    CX_TEST_ASSERT(*(int *) cxIteratorCurrent(iter) == 0);
    CX_TEST_ASSERT(iter.elem_count == 8);
    iter = cxListIteratorAt(list, cxListSize(list));
    cxListInsertBefore(&iter, &newdata[3]);
    CX_TEST_ASSERT(!cxIteratorValid(iter));
    CX_TEST_ASSERT(iter.index == 9);
    CX_TEST_ASSERT(iter.elem_count == 9);
    iter = cxListIteratorAt(list, cxListSize(list));
    cxListInsertAfter(&iter, &newdata[4]);
    CX_TEST_ASSERT(!cxIteratorValid(iter));
    CX_TEST_ASSERT(iter.index == 10);
    CX_TEST_ASSERT(iter.elem_count == 10);

    int expdata[] = array_init(30, 0, 1, 20, 2, 10, 3, 4, 40, 50);
    for (size_t j = 0; j < 10; j++) {
        CX_TEST_ASSERT(*(int *) cxListAt(list, j) == expdata[j]);
    }
})

static CX_TEST_SUBROUTINE(test_list_verify_compare, CxList *left, CxList *right) {
    CX_TEST_ASSERTM(cxListCompare(left, right) == 0, "lists don't start identical");
    int x = 42;
    cxListAdd(left, &x);
    CX_TEST_ASSERT(cxListSize(left) > cxListSize(right));
    CX_TEST_ASSERT(cxListCompare(left, right) > 0);
    CX_TEST_ASSERT(cxListCompare(right, left) < 0);
    cxListAdd(right, &x);
    CX_TEST_ASSERT(cxListSize(left) == cxListSize(right));
    CX_TEST_ASSERT(cxListCompare(left, right) == 0);
    int a = 5, b = 10;
    cxListInsert(left, 15, &a);
    cxListInsert(right, 15, &b);
    CX_TEST_ASSERT(cxListSize(left) == cxListSize(right));
    CX_TEST_ASSERT(cxListCompare(left, right) < 0);
    CX_TEST_ASSERT(cxListCompare(right, left) > 0);
    *(int *) cxListAt(left, 15) = 10;
    CX_TEST_ASSERT(cxListCompare(left, right) == 0);
}

#define roll_out_compare_tests(suffix, otherctr) \
roll_out_test_combos(compare_##suffix, { \
    const size_t len = 47; \
    int *testdata = int_test_data_added_to_list(list, isptrlist, len); \
    CxList *other = otherctr; \
    cxSetCompareFunc(other, cx_cmp_int); \
    for (size_t i = 0; i < len; i++) cxListAdd(other, &testdata[i]); \
    CX_TEST_CALL_SUBROUTINE(test_list_verify_compare, list, other); \
    cxListFree(other); \
    free(testdata); \
})

roll_out_compare_tests(
        ll, cxLinkedListCreate(cxDefaultAllocator, sizeof(int))
)

roll_out_compare_tests(
        pll, cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS)
)

roll_out_compare_tests(
        arl, cxArrayListCreate(cxDefaultAllocator, sizeof(int), 50)
)

roll_out_compare_tests(
        parl, cxArrayListCreate(cxDefaultAllocator, CX_STORE_POINTERS, 50)
)

roll_out_test_combos_with_defaulted_funcs(compare_unoptimized, {
    const size_t len = 33;
    int *testdata = int_test_data_added_to_list(list, isptrlist, len);
    CxList *other = cxArrayListCreate(cxDefaultAllocator, sizeof(int), 50);
    cxSetCompareFunc(other, cx_cmp_int);
    do_set_default_class_funcs(other);
    for (size_t i = 0; i < len; i++) cxListAdd(other, &testdata[i]);
    CX_TEST_CALL_SUBROUTINE(test_list_verify_compare, list, other);
    cxListFree(other);
    free(testdata);
})

static unsigned destr_test_ctr;
static int destr_last_value;

static void simple_destr_test_fun(void *data) {
    int *ptr = data;
    destr_last_value = *ptr;
    *ptr = destr_last_value + 1;
    destr_test_ctr++;
}

static void advanced_destr_test_fun(cx_attr_unused void *u, void *data) {
    simple_destr_test_fun(data);
}

static CX_TEST_SUBROUTINE(test_list_verify_destructor, CxList *list,
                          const int *testdata, size_t testdata_len) {
    destr_test_ctr = 0;

    int off = list->collection.store_pointer ? 1 : 0;

    cxListRemove(list, 15);
    CX_TEST_ASSERT(1 == destr_test_ctr);
    CX_TEST_ASSERT(testdata[15] == destr_last_value + off);
    CX_TEST_ASSERT(testdata_len - destr_test_ctr == cxListSize(list));
    cxListRemove(list, 47);
    CX_TEST_ASSERT(2 == destr_test_ctr);
    CX_TEST_ASSERT(testdata[48] == destr_last_value + off);
    CX_TEST_ASSERT(testdata_len - destr_test_ctr == cxListSize(list));

    CxIterator iter = cxListIteratorAt(list, 7);
    CX_TEST_ASSERT(iter.elem_count == testdata_len - 2);
    cxIteratorNext(iter);
    CX_TEST_ASSERT(2 == destr_test_ctr);
    CX_TEST_ASSERT(testdata[48] == destr_last_value + off);
    CX_TEST_ASSERT(testdata_len - destr_test_ctr == cxListSize(list));
    cxIteratorFlagRemoval(iter);
    cxIteratorNext(iter);
    CX_TEST_ASSERT(iter.elem_count == testdata_len - 3);
    CX_TEST_ASSERT(3 == destr_test_ctr);
    CX_TEST_ASSERT(testdata[8] == destr_last_value + off);
    CX_TEST_ASSERT(testdata_len - destr_test_ctr == cxListSize(list));

    iter = cxListBackwardsIteratorAt(list, 5);
    cxIteratorNext(iter);
    CX_TEST_ASSERT(3 == destr_test_ctr);
    CX_TEST_ASSERT(testdata[8] == destr_last_value + off);
    CX_TEST_ASSERT(testdata_len - destr_test_ctr == cxListSize(list));
    cxIteratorFlagRemoval(iter);
    cxIteratorNext(iter);
    CX_TEST_ASSERT(iter.elem_count == testdata_len - 4);
    CX_TEST_ASSERT(4 == destr_test_ctr);
    CX_TEST_ASSERT(testdata[4] == destr_last_value + off);
    CX_TEST_ASSERT(testdata_len - destr_test_ctr == cxListSize(list));

    cxListClear(list);
    CX_TEST_ASSERT(testdata_len == destr_test_ctr);
    CX_TEST_ASSERT(testdata[testdata_len - 1] == destr_last_value + off);
}

roll_out_test_combos(simple_destr, {
    const size_t len = 60;
    int *testdata = int_test_data_added_to_list(list, isptrlist, len);
    cxSetDestructor(list, simple_destr_test_fun);
    CX_TEST_CALL_SUBROUTINE(test_list_verify_destructor, list, testdata, len);
    free(testdata);
})

roll_out_test_combos(advanced_destr, {
    const size_t len = 75;
    int *testdata = int_test_data_added_to_list(list, isptrlist, len);
    cxSetAdvancedDestructor(list, advanced_destr_test_fun, NULL);
    CX_TEST_CALL_SUBROUTINE(test_list_verify_destructor, list, testdata, len);
    free(testdata);
})

roll_out_test_combos(reserve_and_shrink, {
    // there is no actual observable behavior,
    // so we just check that the functions return zero
    int *td1 = int_test_data_added_to_list(list, isptrlist, 500);
    CX_TEST_ASSERT(0 == cxListReserve(list, 200));
    CX_TEST_ASSERT(0 == cxListReserve(list, 1000));
    int *td2 = int_test_data_added_to_list(list, isptrlist, 500);
    int *td3 = int_test_data_added_to_list(list, isptrlist, 500);
    CX_TEST_ASSERT(0 == cxListShrink(list));
    size_t i = 0;
    for (size_t j = 0 ; j < 500 ; j++, i++) {
        CX_TEST_ASSERT(*(int*)cxListAt(list, i) == td1[j]);
    }
    for (size_t j = 0 ; j < 500 ; j++, i++) {
        CX_TEST_ASSERT(*(int*)cxListAt(list, i) == td2[j]);
    }
    for (size_t j = 0 ; j < 500 ; j++, i++) {
        CX_TEST_ASSERT(*(int*)cxListAt(list, i) == td3[j]);
    }
    free(td1);
    free(td2);
    free(td3);
})

static bool test_clone_func_max_enabled = false;
static unsigned test_clone_func_max_clones;
static void *test_clone_func(void *dest, const void *src, const CxAllocator *al, void *data) {
    if (test_clone_func_max_enabled) {
        if (test_clone_func_max_clones == 0) return NULL;
        test_clone_func_max_clones--;
    }

    if (dest == NULL) {
        dest = cxMalloc(al, sizeof(int));
    }

    int z = 0;
    if (data == NULL) {
        data = &z;
    }

    *((int*) dest) = *(int*) src + *(int*) data;
    (*(int*) data)++;

    return dest;
}

static CX_TEST_SUBROUTINE(verify_clone, CxList *target, CxList *source, bool target_isptrlist) {
    // testing allocator for the target elements if target_isptrlist is true
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *testing_alloc = &talloc.base;

    // register a destructor for the target list if it is storing pointers
    if (target_isptrlist) {
        cxSetAdvancedDestructor(target, cxFree, testing_alloc);
    }

    // fill the source list
    int source_data[8] = array_init(1, 2, 3, 4, 5, 6, 7, 8);
    for (unsigned i = 0 ; i < 8 ; i++) {
        cxListAdd(source, &source_data[i]);
    }

    // add some initial data to the target
    int initial_data[4] = array_init(1, 2, 3, 4);
    for (unsigned i = 0; i < 4; i++) {
        if (target_isptrlist) {
            int *x = cxMalloc(testing_alloc, sizeof(int));
            *x = initial_data[i];
            cxListAdd(target, x);
        } else {
            cxListAdd(target, &initial_data[i]);
        }
    }

    // perform the test
    int expected_data[12] = array_init(1, 2, 3, 4, 1, 3, 5, 7, 9, 11, 13, 15);
    int c = 0;
    CX_TEST_ASSERT(0 == cxListClone(target, source, test_clone_func, testing_alloc, &c));
    CX_TEST_ASSERT(c == 8);
    CX_TEST_ASSERT(cxListSize(target) == 12);
    CX_TEST_ASSERT(cxListSize(source) == 8);
    for (unsigned i = 0 ; i < 12 ; i++) {
        CX_TEST_ASSERT(*(int*)cxListAt(target, i) == expected_data[i]);
    }
    for (unsigned i = 0 ; i < 8 ; i++) {
        CX_TEST_ASSERT(*(int*)cxListAt(source, i) == source_data[i]);
    }
    cxListFree(target);
    CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    cx_testing_allocator_destroy(&talloc);
}

static CX_TEST_SUBROUTINE(verify_clone_alloc_fail, CxList *target, CxList *source, bool target_isptrlist) {
    // testing allocator for the target elements if target_isptrlist is true
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);
    CxAllocator *testing_alloc = &talloc.base;

    // register a destructor for the target list if it is storing pointers
    if (target_isptrlist) {
        cxSetAdvancedDestructor(target, cxFree, testing_alloc);
    }

    // fill the source list
    int source_data[8] = array_init(1, 2, 3, 4, 5, 6, 7, 8);
    for (unsigned i = 0 ; i < 8 ; i++) {
        cxListAdd(source, &source_data[i]);
    }

    // add some initial data to the target
    int initial_data[4] = array_init(1, 2, 3, 4);
    for (unsigned i = 0; i < 4; i++) {
        if (target_isptrlist) {
            int *x = cxMalloc(testing_alloc, sizeof(int));
            *x = initial_data[i];
            cxListAdd(target, x);
        } else {
            cxListAdd(target, &initial_data[i]);
        }
    }

    // perform the test
    int expected_data[9] = array_init(1, 2, 3, 4, 1, 3, 5, 7, 9);
    int c = 0;
    test_clone_func_max_enabled = true;
    test_clone_func_max_clones = 5;
    CX_TEST_ASSERT(0 != cxListClone(target, source, test_clone_func, testing_alloc, &c));
    test_clone_func_max_enabled = false;
    CX_TEST_ASSERT(c == 5);
    CX_TEST_ASSERT(cxListSize(target) == 9);
    CX_TEST_ASSERT(cxListSize(source) == 8);
    for (unsigned i = 0 ; i < 9 ; i++) {
        CX_TEST_ASSERT(*(int*)cxListAt(target, i) == expected_data[i]);
    }
    for (unsigned i = 0 ; i < 8 ; i++) {
        CX_TEST_ASSERT(*(int*)cxListAt(source, i) == source_data[i]);
    }
    cxListFree(target);
    CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    cx_testing_allocator_destroy(&talloc);
}

roll_out_test_combos(clone_into_arl, {
    CxList *target = cxArrayListCreate(cxDefaultAllocator, sizeof(int), 8);
    cxSetCompareFunc(target, cx_cmp_int);
    CX_TEST_CALL_SUBROUTINE(verify_clone, target, list, false);
})

roll_out_test_combos(clone_into_ll, {
    CxList *target = cxLinkedListCreate(cxDefaultAllocator, sizeof(int));
    cxSetCompareFunc(target, cx_cmp_int);
    CX_TEST_CALL_SUBROUTINE(verify_clone, target, list, false);
})

roll_out_test_combos(clone_into_parl, {
    CxList *target = cxArrayListCreate(cxDefaultAllocator, CX_STORE_POINTERS, 8);
    cxSetCompareFunc(target, cx_cmp_int);
    CX_TEST_CALL_SUBROUTINE(verify_clone, target, list, true);
})

roll_out_test_combos(clone_into_pll, {
    CxList *target = cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS);
    cxSetCompareFunc(target, cx_cmp_int);
    CX_TEST_CALL_SUBROUTINE(verify_clone, target, list, true);
})

roll_out_test_combos(clone_alloc_fail_into_arl, {
    CxList *target = cxArrayListCreate(cxDefaultAllocator, sizeof(int), 8);
    cxSetCompareFunc(target, cx_cmp_int);
    CX_TEST_CALL_SUBROUTINE(verify_clone_alloc_fail, target, list, false);
})

roll_out_test_combos(clone_alloc_fail_into_ll, {
    CxList *target = cxLinkedListCreate(cxDefaultAllocator,  sizeof(int));
    cxSetCompareFunc(target, cx_cmp_int);
    CX_TEST_CALL_SUBROUTINE(verify_clone_alloc_fail, target, list, false);
})

roll_out_test_combos(clone_alloc_fail_into_parl, {
    CxList *target = cxArrayListCreate(cxDefaultAllocator,  CX_STORE_POINTERS, 8);
    cxSetCompareFunc(target, cx_cmp_int);
    CX_TEST_CALL_SUBROUTINE(verify_clone_alloc_fail, target, list, true);
})

roll_out_test_combos(clone_alloc_fail_into_pll, {
    CxList *target = cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS);
    cxSetCompareFunc(target, cx_cmp_int);
    CX_TEST_CALL_SUBROUTINE(verify_clone_alloc_fail, target, list, true);
})

static CX_TEST_SUBROUTINE(verify_difference, bool sorted, bool alloc_fail) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);

    CxList *dst = cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS);
    cxSetAdvancedDestructor(dst, cxFree, &talloc);
    CxList *minuend = cxLinkedListCreate(cxDefaultAllocator, sizeof(int));
    CxList *subtrahend = cxLinkedListCreate(cxDefaultAllocator, sizeof(int));
    cxSetCompareFunc(dst, cx_cmp_int);
    cxSetCompareFunc(minuend, cx_cmp_int);
    cxSetCompareFunc(subtrahend, cx_cmp_int);

    int dst_data[] = {47, 178, 176, 83};
    int minuend_data[] = {
        153, 106, 171, 130, 74, 173, 150, 94, 27, 92, 70, 175, 200, 20, 29, 161, 88, 116, 71, 53, 199, 124, 32, 9, 76,
        151, 33, 51, 37, 65, 176, 49, 12, 162, 28, 85, 4, 177, 198, 54, 109, 188, 44, 77, 194, 63, 41, 129, 97, 83
    };
    int subtrahend_data[] = {
        75, 137, 176, 111, 85, 27, 197, 141, 46, 103, 69, 146, 49, 79, 63, 130, 154, 45, 38, 139, 193, 90, 64, 142, 115,
        120, 78, 100, 101, 42, 21, 1, 161, 10, 114, 198, 181, 178, 136, 188, 59, 41, 73, 99, 151, 144, 118, 53, 199, 71
    };

    for (unsigned i = 0 ; i < cx_nmemb(dst_data) ; i++) {
        int *x = cxMalloc(&talloc.base, sizeof(int));
        *x = dst_data[i];
        cxListAdd(dst, x);
    }
    cxListAddArray(minuend, minuend_data, 50);
    cxListAddArray(subtrahend, subtrahend_data, 50);
    if (sorted) {
        cxListSort(dst);
        cxListSort(minuend);
        cxListSort(subtrahend);
    }

    // expected 36 elements in the difference
    size_t expected_len = 40;
    int expected_unsorted[] = {
        47, 178, 176, 83,
        153, 106, 171, 74, 173, 150, 94, 92, 70, 175, 200, 20, 29, 88, 116, 124, 32, 9, 76, 33, 51, 37, 65, 12, 162,
        28, 4, 177, 54, 109, 44, 77, 194, 129, 97, 83
    };
    int expected_sorted[] = {
        47, 83, 176, 178,
        4, 9, 12, 20, 28, 29, 32, 33, 37, 44, 51, 54, 65, 70, 74, 76, 77, 83, 88, 92, 94, 97, 106, 109, 116, 124, 129,
        150, 153, 162, 171, 173, 175, 177, 194, 200
    };

    if (alloc_fail) {
        test_clone_func_max_enabled = true;
        test_clone_func_max_clones = 30;
        expected_len = 34;
    }
    CxList *expected = cxArrayListCreate(cxDefaultAllocator, sizeof(int), expected_len);
    cxSetCompareFunc(expected, cx_cmp_int);
    cxListAddArray(expected, sorted ? expected_sorted : expected_unsorted, expected_len);

    int result = cxListDifference(dst, minuend, subtrahend, test_clone_func, &talloc.base, NULL);
    if (alloc_fail) {
        CX_TEST_ASSERT(result != 0);
    } else {
        CX_TEST_ASSERT(result == 0);
    }
    test_clone_func_max_enabled = false;
    CX_TEST_ASSERT(expected_len == cxListSize(dst));
    CX_TEST_ASSERT(0 == cxListCompare(dst, expected));

    cxListFree(dst);
    cxListFree(minuend);
    cxListFree(subtrahend);
    cxListFree(expected);
    CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_list_difference_unsorted) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_difference, false, false);
    }
}

CX_TEST(test_list_difference_sorted) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_difference, true, false);
    }
}

CX_TEST(test_list_difference_unsorted_alloc_fail) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_difference, false, true);
    }
}

CX_TEST(test_list_difference_sorted_alloc_fail) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_difference, true, true);
    }
}

static CX_TEST_SUBROUTINE(verify_intersection, bool sorted, bool alloc_fail) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);

    CxList *dst = cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS);
    cxSetAdvancedDestructor(dst, cxFree, &talloc);
    CxList *src = cxLinkedListCreate(cxDefaultAllocator, sizeof(int));
    CxList *other = cxLinkedListCreate(cxDefaultAllocator, sizeof(int));
    cxSetCompareFunc(dst, cx_cmp_int);
    cxSetCompareFunc(src, cx_cmp_int);
    cxSetCompareFunc(other, cx_cmp_int);

    int dst_data[] = {47, 178, 176, 83};
    int src_data[] = {
        153, 106, 171, 130, 74, 173, 150, 94, 27, 92, 70, 175, 200, 20, 29, 161, 88, 116, 71, 53, 199, 124, 32, 9, 76,
        151, 33, 51, 37, 65, 176, 49, 12, 162, 28, 85, 4, 177, 198, 54, 109, 188, 44, 77, 194, 63, 41, 129, 97, 83
    };
    int other_data[] = {
        75, 137, 176, 111, 85, 27, 197, 141, 46, 103, 69, 146, 49, 79, 63, 130, 154, 45, 38, 139, 193, 90, 64, 142, 115,
        120, 78, 100, 101, 42, 21, 1, 161, 10, 114, 198, 181, 178, 136, 188, 59, 41, 73, 99, 151, 144, 118, 53, 199, 71
    };

    for (unsigned i = 0 ; i < cx_nmemb(dst_data) ; i++) {
        int *x = cxMalloc(&talloc.base, sizeof(int));
        *x = dst_data[i];
        cxListAdd(dst, x);
    }
    cxListAddArray(src, src_data, 50);
    cxListAddArray(other, other_data, 50);
    if (sorted) {
        cxListSort(dst);
        cxListSort(src);
        cxListSort(other);
    }

    // expected 14 elements in the intersection
    size_t expected_len = 18;
    int expected_unsorted[] = {
        47, 178, 176, 83,
        130, 27, 161, 71, 53, 199, 151, 176, 49, 85, 198, 188, 63, 41
    };
    int expected_sorted[] = {
        47, 83, 176, 178,
        27, 41, 49, 53, 63, 71, 85, 130, 151, 161, 176, 188, 198, 199
    };

    if (alloc_fail) {
        test_clone_func_max_enabled = true;
        test_clone_func_max_clones = 10;
        expected_len = 14;
    }
    CxList *expected = cxArrayListCreate(cxDefaultAllocator, sizeof(int), expected_len);
    cxSetCompareFunc(expected, cx_cmp_int);
    cxListAddArray(expected, sorted ? expected_sorted : expected_unsorted, expected_len);

    int result = cxListIntersection(dst, src, other, test_clone_func, &talloc.base, NULL);
    if (alloc_fail) {
        CX_TEST_ASSERT(result != 0);
    } else {
        CX_TEST_ASSERT(result == 0);
    }
    test_clone_func_max_enabled = false;
    CX_TEST_ASSERT(expected_len == cxListSize(dst));
    CX_TEST_ASSERT(0 == cxListCompare(dst, expected));

    cxListFree(dst);
    cxListFree(src);
    cxListFree(other);
    cxListFree(expected);
    CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_list_intersection_unsorted) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_intersection, false, false);
    }
}

CX_TEST(test_list_intersection_sorted) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_intersection, true, false);
    }
}

CX_TEST(test_list_intersection_unsorted_alloc_fail) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_intersection, false, true);
    }
}

CX_TEST(test_list_intersection_sorted_alloc_fail) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_intersection, true, true);
    }
}

static CX_TEST_SUBROUTINE(verify_union, bool sorted, bool alloc_fail) {
    CxTestingAllocator talloc;
    cx_testing_allocator_init(&talloc);

    CxList *dst = cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS);
    cxSetCompareFunc(dst, cx_cmp_int);
    cxSetAdvancedDestructor(dst, cxFree, &talloc);
    CxList *src = cxLinkedListCreate(cxDefaultAllocator, sizeof(int));
    CxList *other = cxLinkedListCreate(cxDefaultAllocator, sizeof(int));
    cxSetCompareFunc(src, cx_cmp_int);
    cxSetCompareFunc(other, cx_cmp_int);

    int dst_data[] = {47, 178, 176, 83};
    int src_data[] = {
        153, 106, 171, 130, 74, 173, 150, 94, 27, 92, 70, 175, 200, 20, 29, 161, 88, 116, 71, 53, 199, 124, 32, 9, 76,
        151, 33, 51, 37, 65, 176, 49, 12, 162, 28, 85, 4, 177, 198, 54, 109, 188, 44, 77, 194, 63, 41, 129, 97, 83
    };
    int other_data[] = {
        75, 137, 176, 111, 85, 27, 197, 141, 46, 103, 69, 146, 49, 79, 63, 130, 154, 45, 38, 139, 193, 90, 64, 142, 115,
        120, 78, 100, 101, 42, 21, 1, 161, 10, 114, 198, 181, 178, 136, 188, 59, 41, 73, 99, 151, 144, 118, 53, 199, 71
    };

    for (unsigned i = 0 ; i < cx_nmemb(dst_data) ; i++) {
        int *x = cxMalloc(&talloc.base, sizeof(int));
        *x = dst_data[i];
        cxListAdd(dst, x);
    }
    cxListAddArray(src, src_data, 50);
    cxListAddArray(other, other_data, 50);
    if (sorted) {
        cxListSort(dst);
        cxListSort(src);
        cxListSort(other);
    }

    // the 14 elements from the intersection should not appear twice in the destination:
    // 27, 41, 49, 53, 63, 71, 85, 130, 151, 161, 176, 188, 198, 199
    // however, the elements that are already in dst may appear twice
    size_t expected_len = 90;
    int expected_unsorted[] = {
        47, 178, 176, 83,
        153, 106, 171, 130, 74, 173, 150, 94, 27, 92, 70, 175, 200, 20, 29, 161,
        88, 116, 71, 53, 199, 124, 32, 9, 76, 151, 33, 51, 37, 65, 176, 49, 12,
        162, 28, 85, 4, 177, 198, 54, 109, 188, 44, 77, 194, 63, 41, 129, 97,
        83, 75, 137, 111, 197, 141, 46, 103, 69, 146, 79, 154, 45, 38, 139, 193,
        90, 64, 142, 115, 120, 78, 100, 101, 42, 21, 1, 10, 114, 181, 178, 136,
        59, 73, 99, 144, 118
    };
    int expected_sorted[] = {
        47, 83, 176, 178,
        1, 4, 9, 10, 12, 20, 21, 27, 28, 29, 32, 33, 37, 38, 41, 42, 44, 45,
        46, 49, 51, 53, 54, 59, 63, 64, 65, 69, 70, 71, 73, 74, 75, 76, 77, 78,
        79, 83, 85, 88, 90, 92, 94, 97, 99, 100, 101, 103, 106, 109, 111, 114,
        115, 116, 118, 120, 124, 129, 130, 136, 137, 139, 141, 142, 144, 146,
        150, 151, 153, 154, 161, 162, 171, 173, 175, 176, 177, 178, 181, 188,
        193, 194, 197, 198, 199, 200
    };

    if (alloc_fail) {
        test_clone_func_max_enabled = true;
        test_clone_func_max_clones = 66;
        expected_len = 70;
    }
    CxList *expected = cxArrayListCreate(cxDefaultAllocator, sizeof(int), expected_len);
    cxSetCompareFunc(expected, cx_cmp_int);
    cxListAddArray(expected, sorted ? expected_sorted : expected_unsorted, expected_len);

    int result = cxListUnion(dst, src, other, test_clone_func, &talloc.base, NULL);
    if (alloc_fail) {
        CX_TEST_ASSERT(result != 0);
    } else {
        CX_TEST_ASSERT(result == 0);
    }
    test_clone_func_max_enabled = false;
    CX_TEST_ASSERT(expected_len == cxListSize(dst));
    CX_TEST_ASSERT(0 == cxListCompare(dst, expected));

    cxListFree(dst);
    cxListFree(src);
    cxListFree(other);
    cxListFree(expected);
    CX_TEST_ASSERT(cx_testing_allocator_verify(&talloc));
    cx_testing_allocator_destroy(&talloc);
}

CX_TEST(test_list_union_unsorted) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_union, false, false);
    }
}

CX_TEST(test_list_union_sorted) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_union, true, false);
    }
}

CX_TEST(test_list_union_unsorted_alloc_fail) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_union, false, true);
    }
}

CX_TEST(test_list_union_sorted_alloc_fail) {
    CX_TEST_DO {
        CX_TEST_CALL_SUBROUTINE(verify_union, true, true);
    }
}

CX_TEST(test_list_simple_clones) {

    int a[] = {1, 2, 5, 8, 10};
    int b[] = {1, 3, 5, 7, 9, 11};
    int c[] = {2, 4, 6, 8, 10, 12};
    int d[] = {4, 8, 12};

    CxList *la = cxArrayListCreate(NULL, sizeof(int), 8);
    cxSetCompareFunc(la, cx_cmp_int);
    cxListInsertSortedArray(la, a, cx_nmemb(a));
    CxList *lb = cxArrayListCreate(NULL, sizeof(int), 8);
    cxSetCompareFunc(lb, cx_cmp_int);
    cxListInsertSortedArray(lb, b, cx_nmemb(b));
    CxList *lc = cxArrayListCreate(NULL, sizeof(int), 8);
    cxSetCompareFunc(lc, cx_cmp_int);
    cxListInsertSortedArray(lc, c, cx_nmemb(c));
    CxList *ld = cxArrayListCreate(NULL, sizeof(int), 8);
    cxSetCompareFunc(ld, cx_cmp_int);
    cxListInsertSortedArray(ld, d, cx_nmemb(d));

    CxList *d1 = cxArrayListCreate(NULL, sizeof(int), 8);
    cxSetCompareFunc(d1, cx_cmp_int);
    CxList *d2 = cxArrayListCreate(NULL, sizeof(int), 8);
    cxSetCompareFunc(d2, cx_cmp_int);

    CX_TEST_DO {
        // clone a into d1
        CX_TEST_ASSERT(0 == cxListCloneShallow(d1, la));
        CX_TEST_ASSERT(0 == cxListCompare(d1, la));
        CX_TEST_ASSERT(cxCollectionSorted(d1));

        // union of a (in d1) and b
        CX_TEST_ASSERT(0 == cxListUnionShallow(d2, d1, lb));
        CX_TEST_ASSERT(cxCollectionSorted(d2));
        CxList *expected_union = cxArrayListCreate(NULL, sizeof(int), 8);
        {
            int expected[] = {1, 2, 3, 5, 7, 8, 9, 10, 11};
            cxListAddArray(expected_union, expected, cx_nmemb(expected));
        }
        CX_TEST_ASSERT(0 == cxListCompare(d2, expected_union));
        cxListFree(expected_union);

        // intersection of (a union b) and c
        cxListClear(d1);
        CX_TEST_ASSERT(0 == cxListIntersectionShallow(d1, d2, lc));
        CX_TEST_ASSERT(cxCollectionSorted(d1));
        CxList *expected_intersection = cxArrayListCreate(NULL, sizeof(int), 8);
        {
            int expected[] = {2, 8, 10};
            cxListAddArray(expected_intersection, expected, cx_nmemb(expected));
        }
        CX_TEST_ASSERT(0 == cxListCompare(d1, expected_intersection));
        cxListFree(expected_intersection);

        // difference of ((a union b) intersect c) minus d
        cxListClear(d2);
        CX_TEST_ASSERT(0 == cxListDifferenceShallow(d2, d1, ld));
        CX_TEST_ASSERT(cxCollectionSorted(d2));
        CxList *expected_difference = cxArrayListCreate(NULL, sizeof(int), 8);
        {
            int expected[] = {2, 10};
            cxListAddArray(expected_difference, expected, cx_nmemb(expected));
        }
        CX_TEST_ASSERT(0 == cxListCompare(d2, expected_difference));
        cxListFree(expected_difference);
    }

    cxListFree(d1);
    cxListFree(d2);
    cxListFree(la);
    cxListFree(lb);
    cxListFree(lc);
    cxListFree(ld);
}

CX_TEST(test_list_pointer_list_supports_null) {
    CxList *list = cxLinkedListCreate(cxDefaultAllocator, CX_STORE_POINTERS);
    cxSetCompareFunc(list, cx_cmp_int);
    int x = 47;
    int y = 11;
    int z = 1337;
    int *nptr = NULL;
    cxListAdd(list, &x);
    cxListAdd(list, &y);
    cxListAdd(list, nptr);
    cxListAdd(list, &z);
    CX_TEST_DO {
        CX_TEST_ASSERT(cxListSize(list) == 4);
        CX_TEST_ASSERT(*(int *) cxListAt(list, 0) == 47);
        CX_TEST_ASSERT(*(int *) cxListAt(list, 1) == 11);
        CX_TEST_ASSERT((int *) cxListAt(list, 2) == NULL);
        CX_TEST_ASSERT(*(int *) cxListAt(list, 3) == 1337);
        CX_TEST_ASSERT(cxListFind(list, nptr) == 2);

        // when we sort the list, NULL is supposed to be smaller than any value
        cxListSort(list);
        CX_TEST_ASSERT((int *) cxListAt(list, 0) == NULL);
        CX_TEST_ASSERT(*(int *) cxListAt(list, 1) == 11);
        CX_TEST_ASSERT(*(int *) cxListAt(list, 2) == 47);
        CX_TEST_ASSERT(*(int *) cxListAt(list, 3) == 1337);
    }
    cxListFree(list);
}

CX_TEST(test_list_use_insert_unique_to_remove_duplicates) {
    CxList *linked_list = cxLinkedListCreate(cxDefaultAllocator, sizeof(int));
    CxList *array_list = cxArrayListCreate(cxDefaultAllocator, sizeof(int), 8);
    CxList *defaulted_list = cxArrayListCreate(cxDefaultAllocator, sizeof(int), 8);
    cxSetCompareFunc(linked_list, cx_cmp_int);
    cxSetCompareFunc(array_list, cx_cmp_int);
    cxSetCompareFunc(defaulted_list, cx_cmp_int);
    do_set_default_class_funcs(defaulted_list);
    int test_array[23] = {
        120, -13, 100, -90, 13, -56, 74, 20, 28, 80, 18, -56, 130, 12, 15, 0, 39, 100, 0, 29, 28, 85, 20
    };
    int test_array_unique[18] = {
        -90, -56, -13, 0, 12, 13, 15, 18, 20, 28, 29, 39, 74, 80, 85, 100, 120, 130
    };
    CX_TEST_DO {
        qsort(test_array, 23, sizeof(int), cx_cmp_int);
        cxListInsertUniqueArray(linked_list, test_array, 23);
        cxListInsertUniqueArray(array_list, test_array, 23);
        cxListInsertUniqueArray(defaulted_list, test_array, 23);
        CX_TEST_ASSERT(cxListSize(linked_list) == 18);
        CX_TEST_ASSERT(cxListSize(array_list) == 18);
        CX_TEST_ASSERT(cxListSize(defaulted_list) == 18);
        for (unsigned i = 0; i < 18; i++) {
            CX_TEST_ASSERT(*(int *) cxListAt(linked_list, i) == test_array_unique[i]);
            CX_TEST_ASSERT(*(int *) cxListAt(array_list, i) == test_array_unique[i]);
            CX_TEST_ASSERT(*(int *) cxListAt(defaulted_list, i) == test_array_unique[i]);
        }
    }
    cxListFree(defaulted_list);
    cxListFree(linked_list);
    cxListFree(array_list);
}

CX_TEST(test_list_use_insert_unique_with_duplicates_in_source) {
    CxList *linked_list = cxLinkedListCreate(cxDefaultAllocator, sizeof(int));
    CxList *array_list = cxArrayListCreate(cxDefaultAllocator, sizeof(int), 8);
    CxList *defaulted_list = cxArrayListCreate(cxDefaultAllocator, sizeof(int), 8);
    cxSetCompareFunc(linked_list, cx_cmp_int);
    cxSetCompareFunc(array_list, cx_cmp_int);
    cxSetCompareFunc(defaulted_list, cx_cmp_int);
    do_set_default_class_funcs(defaulted_list);
    int pre_filled[10] = {-13, 5, 18, 30, 40, 45, 50, 80, 85, 110};
    cxListInsertSortedArray(linked_list, pre_filled, 10);
    cxListInsertSortedArray(array_list, pre_filled, 10);
    cxListInsertSortedArray(defaulted_list, pre_filled, 10);
    int test_array[23] = {
        120, -13, 100, -90, 13, -56, 74, 20, 28, 80, 18, -56, 130, 12, 15, 0, 39, 100, 0, 29, 28, 85, 20
    };
    int test_array_unique[24] = {
        -90, -56, -13, 0, 5, 12, 13, 15, 18, 20, 28, 29, 30, 39, 40, 45, 50, 74, 80, 85, 100, 110, 120, 130
    };
    CX_TEST_DO {
        qsort(test_array, 23, sizeof(int), cx_cmp_int);
        cxListInsertUniqueArray(linked_list, test_array, 23);
        cxListInsertUniqueArray(array_list, test_array, 23);
        cxListInsertUniqueArray(defaulted_list, test_array, 23);
        CX_TEST_ASSERT(cxListSize(linked_list) == 24);
        CX_TEST_ASSERT(cxListSize(array_list) == 24);
        CX_TEST_ASSERT(cxListSize(defaulted_list) == 24);
        for (unsigned i = 0; i < 24; i++) {
            CX_TEST_ASSERT(*(int *) cxListAt(linked_list, i) == test_array_unique[i]);
            CX_TEST_ASSERT(*(int *) cxListAt(array_list, i) == test_array_unique[i]);
            CX_TEST_ASSERT(*(int *) cxListAt(defaulted_list, i) == test_array_unique[i]);
        }
        CX_TEST_ASSERT(*(int*)cxListLast(linked_list) == 130);
        CX_TEST_ASSERT(*(int*)cxListLast(array_list) == 130);
        CX_TEST_ASSERT(*(int*)cxListLast(defaulted_list) == 130);
    }
    cxListFree(defaulted_list);
    cxListFree(linked_list);
    cxListFree(array_list);
}

CxTestSuite *cx_test_suite_array_list(void) {
    CxTestSuite *suite = cx_test_suite_new("array_list");

    cx_test_register(suite, test_array_add);
    cx_test_register(suite, test_array_copy_overlap);
    cx_test_register(suite, test_array_reserve);
    cx_test_register(suite, test_array_reserve_unsupported_width);
    cx_test_register(suite, test_array_insert_sorted);
    cx_test_register(suite, test_array_insert_unique);
    cx_test_register(suite, test_array_binary_search);
    cx_test_register(suite, test_array_binary_search_with_duplicates);

    cx_test_register(suite, test_list_arl_create);
    cx_test_register(suite, test_list_arl_create_simple);
    cx_test_register(suite, test_list_arl_create_simple_for_pointers);
    cx_test_register(suite, test_list_parl_destroy_no_destr);
    cx_test_register(suite, test_list_parl_destroy_simple_destr);
    cx_test_register(suite, test_list_parl_destroy_adv_destr);

    cx_test_register(suite, test_list_arl_add);
    cx_test_register(suite, test_list_parl_add);
    cx_test_register(suite, test_list_arl_insert);
    cx_test_register(suite, test_list_parl_insert);
    cx_test_register(suite, test_list_arl_emplace);
    cx_test_register(suite, test_list_parl_emplace);
    cx_test_register(suite, test_list_arl_insert_array);
    cx_test_register(suite, test_list_parl_insert_array);
    cx_test_register(suite, test_list_arl_emplace_array);
    cx_test_register(suite, test_list_parl_emplace_array);
    cx_test_register(suite, test_list_arl_insert_sorted);
    cx_test_register(suite, test_list_parl_insert_sorted);
    cx_test_register(suite, test_list_arl_insert_unique);
    cx_test_register(suite, test_list_parl_insert_unique);
    cx_test_register(suite, test_list_arl_insert_unique_not_sorted);
    cx_test_register(suite, test_list_parl_insert_unique_not_sorted);
    cx_test_register(suite, test_list_arl_remove);
    cx_test_register(suite, test_list_parl_remove);
    cx_test_register(suite, test_list_arl_remove_and_get);
    cx_test_register(suite, test_list_parl_remove_and_get);
    cx_test_register(suite, test_list_arl_remove_array);
    cx_test_register(suite, test_list_parl_remove_array);
    cx_test_register(suite, test_list_arl_find_remove);
    cx_test_register(suite, test_list_parl_find_remove);
    cx_test_register(suite, test_list_arl_find_remove_sorted);
    cx_test_register(suite, test_list_parl_find_remove_sorted);
    cx_test_register(suite, test_list_arl_contains);
    cx_test_register(suite, test_list_parl_contains);
    cx_test_register(suite, test_list_arl_clear);
    cx_test_register(suite, test_list_parl_clear);
    cx_test_register(suite, test_list_arl_at);
    cx_test_register(suite, test_list_parl_at);
    cx_test_register(suite, test_list_arl_set);
    cx_test_register(suite, test_list_parl_set);
    cx_test_register(suite, test_list_arl_swap);
    cx_test_register(suite, test_list_parl_swap);
    cx_test_register(suite, test_list_arl_swap_no_sbo);
    cx_test_register(suite, test_list_arl_find);
    cx_test_register(suite, test_list_parl_find);
    cx_test_register(suite, test_list_arl_sort);
    cx_test_register(suite, test_list_parl_sort);
    cx_test_register(suite, test_list_arl_reverse);
    cx_test_register(suite, test_list_parl_reverse);
    cx_test_register(suite, test_list_arl_iterator);
    cx_test_register(suite, test_list_parl_iterator);
    cx_test_register(suite, test_list_arl_insert_with_iterator);
    cx_test_register(suite, test_list_parl_insert_with_iterator);
    cx_test_register(suite, test_list_arl_compare_ll);
    cx_test_register(suite, test_list_arl_compare_arl);
    cx_test_register(suite, test_list_arl_compare_pll);
    cx_test_register(suite, test_list_arl_compare_parl);
    cx_test_register(suite, test_list_parl_compare_ll);
    cx_test_register(suite, test_list_parl_compare_arl);
    cx_test_register(suite, test_list_parl_compare_pll);
    cx_test_register(suite, test_list_parl_compare_parl);
    cx_test_register(suite, test_list_arl_simple_destr);
    cx_test_register(suite, test_list_parl_simple_destr);
    cx_test_register(suite, test_list_arl_advanced_destr);
    cx_test_register(suite, test_list_parl_advanced_destr);
    cx_test_register(suite, test_list_arl_reserve_and_shrink);
    cx_test_register(suite, test_list_parl_reserve_and_shrink);
    cx_test_register(suite, test_list_arl_clone_into_arl);
    cx_test_register(suite, test_list_parl_clone_into_arl);
    cx_test_register(suite, test_list_arl_clone_into_ll);
    cx_test_register(suite, test_list_parl_clone_into_ll);
    cx_test_register(suite, test_list_arl_clone_into_parl);
    cx_test_register(suite, test_list_parl_clone_into_parl);
    cx_test_register(suite, test_list_arl_clone_into_pll);
    cx_test_register(suite, test_list_parl_clone_into_pll);
    cx_test_register(suite, test_list_arl_clone_alloc_fail_into_arl);
    cx_test_register(suite, test_list_parl_clone_alloc_fail_into_arl);
    cx_test_register(suite, test_list_arl_clone_alloc_fail_into_ll);
    cx_test_register(suite, test_list_parl_clone_alloc_fail_into_ll);
    cx_test_register(suite, test_list_arl_clone_alloc_fail_into_parl);
    cx_test_register(suite, test_list_parl_clone_alloc_fail_into_parl);
    cx_test_register(suite, test_list_arl_clone_alloc_fail_into_pll);
    cx_test_register(suite, test_list_parl_clone_alloc_fail_into_pll);

    return suite;
}

CxTestSuite *cx_test_suite_array_list_defaulted_funcs(void) {
    CxTestSuite *suite = cx_test_suite_new(
            "array_list with defaulted functions");

    cx_test_register(suite, test_list_arlm_insert_array);
    cx_test_register(suite, test_list_parlm_insert_array);
    cx_test_register(suite, test_list_arlm_emplace_array);
    cx_test_register(suite, test_list_parlm_emplace_array);
    cx_test_register(suite, test_list_arlm_insert_sorted);
    cx_test_register(suite, test_list_parlm_insert_sorted);
    cx_test_register(suite, test_list_arlm_insert_unique);
    cx_test_register(suite, test_list_parlm_insert_unique);
    cx_test_register(suite, test_list_arlm_insert_unique_not_sorted);
    cx_test_register(suite, test_list_parlm_insert_unique_not_sorted);
    cx_test_register(suite, test_list_arlm_swap);
    cx_test_register(suite, test_list_parlm_swap);
    cx_test_register(suite, test_list_arlm_sort);
    cx_test_register(suite, test_list_parlm_sort);

    cx_test_register(suite, test_list_arl_compare_unoptimized);
    cx_test_register(suite, test_list_parl_compare_unoptimized);
    cx_test_register(suite, test_list_arlm_compare_unoptimized);
    cx_test_register(suite, test_list_parlm_compare_unoptimized);

    return suite;
}

CxTestSuite *cx_test_suite_linked_list(void) {
    CxTestSuite *suite = cx_test_suite_new("linked_list");

    cx_test_register(suite, test_linked_list_link_unlink);
    cx_test_register(suite, test_linked_list_at);
    cx_test_register(suite, test_linked_list_find);
    cx_test_register(suite, test_linked_list_compare);
    cx_test_register(suite, test_linked_list_add);
    cx_test_register(suite, test_linked_list_prepend);
    cx_test_register(suite, test_linked_list_insert);
    cx_test_register(suite, test_linked_list_insert_chain);
    cx_test_register(suite, test_linked_list_insert_sorted);
    cx_test_register(suite, test_linked_list_insert_unique);
    cx_test_register(suite, test_linked_list_first);
    cx_test_register(suite, test_linked_list_last);
    cx_test_register(suite, test_linked_list_prev);
    cx_test_register(suite, test_linked_list_remove);
    cx_test_register(suite, test_linked_list_remove_chain);
    cx_test_register(suite, test_linked_list_size);
    cx_test_register(suite, test_linked_list_sort_empty);
    cx_test_register(suite, test_linked_list_sort);
    cx_test_register(suite, test_linked_list_reverse);

    cx_test_register(suite, test_list_ll_create);
    cx_test_register(suite, test_list_ll_create_simple);
    cx_test_register(suite, test_list_ll_create_simple_for_pointers);
    cx_test_register(suite, test_list_pll_destroy_no_destr);
    cx_test_register(suite, test_list_pll_destroy_simple_destr);
    cx_test_register(suite, test_list_pll_destroy_adv_destr);

    cx_test_register(suite, test_list_ll_add);
    cx_test_register(suite, test_list_pll_add);
    cx_test_register(suite, test_list_ll_insert);
    cx_test_register(suite, test_list_pll_insert);
    cx_test_register(suite, test_list_ll_emplace);
    cx_test_register(suite, test_list_pll_emplace);
    cx_test_register(suite, test_list_ll_insert_array);
    cx_test_register(suite, test_list_pll_insert_array);
    cx_test_register(suite, test_list_ll_emplace_array);
    cx_test_register(suite, test_list_pll_emplace_array);
    cx_test_register(suite, test_list_ll_insert_sorted);
    cx_test_register(suite, test_list_pll_insert_sorted);
    cx_test_register(suite, test_list_ll_insert_unique);
    cx_test_register(suite, test_list_pll_insert_unique);
    cx_test_register(suite, test_list_ll_insert_unique_not_sorted);
    cx_test_register(suite, test_list_pll_insert_unique_not_sorted);
    cx_test_register(suite, test_list_ll_remove);
    cx_test_register(suite, test_list_pll_remove);
    cx_test_register(suite, test_list_ll_remove_and_get);
    cx_test_register(suite, test_list_pll_remove_and_get);
    cx_test_register(suite, test_list_ll_remove_array);
    cx_test_register(suite, test_list_pll_remove_array);
    cx_test_register(suite, test_list_ll_find_remove);
    cx_test_register(suite, test_list_pll_find_remove);
    cx_test_register(suite, test_list_ll_find_remove_sorted);
    cx_test_register(suite, test_list_pll_find_remove_sorted);
    cx_test_register(suite, test_list_ll_contains);
    cx_test_register(suite, test_list_pll_contains);
    cx_test_register(suite, test_list_ll_clear);
    cx_test_register(suite, test_list_pll_clear);
    cx_test_register(suite, test_list_ll_at);
    cx_test_register(suite, test_list_pll_at);
    cx_test_register(suite, test_list_ll_set);
    cx_test_register(suite, test_list_pll_set);
    cx_test_register(suite, test_list_ll_swap);
    cx_test_register(suite, test_list_pll_swap);
    cx_test_register(suite, test_list_ll_find);
    cx_test_register(suite, test_list_pll_find);
    cx_test_register(suite, test_list_ll_sort);
    cx_test_register(suite, test_list_pll_sort);
    cx_test_register(suite, test_list_ll_reverse);
    cx_test_register(suite, test_list_pll_reverse);
    cx_test_register(suite, test_list_ll_iterator);
    cx_test_register(suite, test_list_pll_iterator);
    cx_test_register(suite, test_list_ll_insert_with_iterator);
    cx_test_register(suite, test_list_pll_insert_with_iterator);
    cx_test_register(suite, test_list_ll_compare_ll);
    cx_test_register(suite, test_list_ll_compare_arl);
    cx_test_register(suite, test_list_ll_compare_pll);
    cx_test_register(suite, test_list_ll_compare_parl);
    cx_test_register(suite, test_list_pll_compare_ll);
    cx_test_register(suite, test_list_pll_compare_arl);
    cx_test_register(suite, test_list_pll_compare_pll);
    cx_test_register(suite, test_list_pll_compare_parl);
    cx_test_register(suite, test_list_ll_simple_destr);
    cx_test_register(suite, test_list_pll_simple_destr);
    cx_test_register(suite, test_list_ll_advanced_destr);
    cx_test_register(suite, test_list_pll_advanced_destr);
    cx_test_register(suite, test_list_ll_reserve_and_shrink);
    cx_test_register(suite, test_list_pll_reserve_and_shrink);
    cx_test_register(suite, test_list_ll_clone_into_arl);
    cx_test_register(suite, test_list_pll_clone_into_arl);
    cx_test_register(suite, test_list_ll_clone_into_ll);
    cx_test_register(suite, test_list_pll_clone_into_ll);
    cx_test_register(suite, test_list_ll_clone_into_parl);
    cx_test_register(suite, test_list_pll_clone_into_parl);
    cx_test_register(suite, test_list_ll_clone_into_pll);
    cx_test_register(suite, test_list_pll_clone_into_pll);
    cx_test_register(suite, test_list_ll_clone_alloc_fail_into_arl);
    cx_test_register(suite, test_list_pll_clone_alloc_fail_into_arl);
    cx_test_register(suite, test_list_ll_clone_alloc_fail_into_ll);
    cx_test_register(suite, test_list_pll_clone_alloc_fail_into_ll);
    cx_test_register(suite, test_list_ll_clone_alloc_fail_into_parl);
    cx_test_register(suite, test_list_pll_clone_alloc_fail_into_parl);
    cx_test_register(suite, test_list_ll_clone_alloc_fail_into_pll);
    cx_test_register(suite, test_list_pll_clone_alloc_fail_into_pll);

    return suite;
}

CxTestSuite *cx_test_suite_linked_list_defaulted_funcs(void) {
    CxTestSuite *suite = cx_test_suite_new(
            "linked_list with defaulted functions");

    cx_test_register(suite, test_list_llm_insert_array);
    cx_test_register(suite, test_list_pllm_insert_array);
    cx_test_register(suite, test_list_llm_emplace_array);
    cx_test_register(suite, test_list_pllm_emplace_array);
    cx_test_register(suite, test_list_llm_insert_sorted);
    cx_test_register(suite, test_list_pllm_insert_sorted);
    cx_test_register(suite, test_list_llm_insert_unique);
    cx_test_register(suite, test_list_pllm_insert_unique);
    cx_test_register(suite, test_list_llm_insert_unique_not_sorted);
    cx_test_register(suite, test_list_pllm_insert_unique_not_sorted);
    cx_test_register(suite, test_list_llm_swap);
    cx_test_register(suite, test_list_pllm_swap);
    cx_test_register(suite, test_list_llm_sort);
    cx_test_register(suite, test_list_pllm_sort);

    cx_test_register(suite, test_list_ll_compare_unoptimized);
    cx_test_register(suite, test_list_pll_compare_unoptimized);
    cx_test_register(suite, test_list_llm_compare_unoptimized);
    cx_test_register(suite, test_list_pllm_compare_unoptimized);

    return suite;
}

CxTestSuite *cx_test_suite_kv_list(void) {
    CxTestSuite *suite = cx_test_suite_new("kv_list");

    cx_test_register(suite, test_list_kvl_add);
    cx_test_register(suite, test_list_pkvl_add);
    cx_test_register(suite, test_list_kvl_insert);
    cx_test_register(suite, test_list_pkvl_insert);
    cx_test_register(suite, test_list_kvl_emplace);
    cx_test_register(suite, test_list_pkvl_emplace);
    cx_test_register(suite, test_list_kvl_insert_array);
    cx_test_register(suite, test_list_pkvl_insert_array);
    cx_test_register(suite, test_list_kvl_emplace_array);
    cx_test_register(suite, test_list_pkvl_emplace_array);
    cx_test_register(suite, test_list_kvl_insert_sorted);
    cx_test_register(suite, test_list_pkvl_insert_sorted);
    cx_test_register(suite, test_list_kvl_insert_unique);
    cx_test_register(suite, test_list_pkvl_insert_unique);
    cx_test_register(suite, test_list_kvl_insert_unique_not_sorted);
    cx_test_register(suite, test_list_pkvl_insert_unique_not_sorted);
    cx_test_register(suite, test_list_kvl_remove);
    cx_test_register(suite, test_list_pkvl_remove);
    cx_test_register(suite, test_list_kvl_remove_and_get);
    cx_test_register(suite, test_list_pkvl_remove_and_get);
    cx_test_register(suite, test_list_kvl_remove_array);
    cx_test_register(suite, test_list_pkvl_remove_array);
    cx_test_register(suite, test_list_kvl_find_remove);
    cx_test_register(suite, test_list_pkvl_find_remove);
    cx_test_register(suite, test_list_kvl_find_remove_sorted);
    cx_test_register(suite, test_list_pkvl_find_remove_sorted);
    cx_test_register(suite, test_list_kvl_contains);
    cx_test_register(suite, test_list_pkvl_contains);
    cx_test_register(suite, test_list_kvl_clear);
    cx_test_register(suite, test_list_pkvl_clear);
    cx_test_register(suite, test_list_kvl_at);
    cx_test_register(suite, test_list_pkvl_at);
    cx_test_register(suite, test_list_kvl_set);
    cx_test_register(suite, test_list_pkvl_set);
    cx_test_register(suite, test_list_kvl_swap);
    cx_test_register(suite, test_list_pkvl_swap);
    cx_test_register(suite, test_list_kvl_find);
    cx_test_register(suite, test_list_pkvl_find);
    cx_test_register(suite, test_list_kvl_sort);
    cx_test_register(suite, test_list_pkvl_sort);
    cx_test_register(suite, test_list_kvl_reverse);
    cx_test_register(suite, test_list_pkvl_reverse);
    cx_test_register(suite, test_list_kvl_iterator);
    cx_test_register(suite, test_list_pkvl_iterator);
    cx_test_register(suite, test_list_kvl_insert_with_iterator);
    cx_test_register(suite, test_list_pkvl_insert_with_iterator);
    cx_test_register(suite, test_list_kvl_compare_ll);
    cx_test_register(suite, test_list_kvl_compare_arl);
    cx_test_register(suite, test_list_kvl_compare_pll);
    cx_test_register(suite, test_list_kvl_compare_parl);
    cx_test_register(suite, test_list_pkvl_compare_ll);
    cx_test_register(suite, test_list_pkvl_compare_arl);
    cx_test_register(suite, test_list_pkvl_compare_pll);
    cx_test_register(suite, test_list_pkvl_compare_parl);
    cx_test_register(suite, test_list_kvl_simple_destr);
    cx_test_register(suite, test_list_pkvl_simple_destr);
    cx_test_register(suite, test_list_kvl_advanced_destr);
    cx_test_register(suite, test_list_pkvl_advanced_destr);
    cx_test_register(suite, test_list_kvl_reserve_and_shrink);
    cx_test_register(suite, test_list_pkvl_reserve_and_shrink);
    // note: kv-lists also support a list clone, but that does not clone the keys
    cx_test_register(suite, test_list_kvl_clone_into_arl);
    cx_test_register(suite, test_list_pkvl_clone_into_arl);
    cx_test_register(suite, test_list_kvl_clone_into_ll);
    cx_test_register(suite, test_list_pkvl_clone_into_ll);
    cx_test_register(suite, test_list_kvl_clone_into_parl);
    cx_test_register(suite, test_list_pkvl_clone_into_parl);
    cx_test_register(suite, test_list_kvl_clone_into_pll);
    cx_test_register(suite, test_list_pkvl_clone_into_pll);
    cx_test_register(suite, test_list_kvl_clone_alloc_fail_into_arl);
    cx_test_register(suite, test_list_pkvl_clone_alloc_fail_into_arl);
    cx_test_register(suite, test_list_kvl_clone_alloc_fail_into_ll);
    cx_test_register(suite, test_list_pkvl_clone_alloc_fail_into_ll);
    cx_test_register(suite, test_list_kvl_clone_alloc_fail_into_parl);
    cx_test_register(suite, test_list_pkvl_clone_alloc_fail_into_parl);
    cx_test_register(suite, test_list_kvl_clone_alloc_fail_into_pll);
    cx_test_register(suite, test_list_pkvl_clone_alloc_fail_into_pll);

    return suite;
}

CxTestSuite *cx_test_suite_empty_list(void) {
    CxTestSuite *suite = cx_test_suite_new("empty list dummy");

    cx_test_register(suite, test_empty_list_size);
    cx_test_register(suite, test_empty_list_iterator);
    cx_test_register(suite, test_null_list_iterator);
    cx_test_register(suite, test_empty_list_noops);
    cx_test_register(suite, test_empty_list_at);
    cx_test_register(suite, test_empty_list_find);
    cx_test_register(suite, test_empty_list_compare);
    cx_test_register(suite, test_null_list_free);

    return suite;
}

CxTestSuite *cx_test_suite_list_set_ops(void) {
    CxTestSuite *suite = cx_test_suite_new("list collection operations");

    // we do not perform the following tests with every combination of list types
    cx_test_register(suite, test_list_union_unsorted);
    cx_test_register(suite, test_list_union_sorted);
    cx_test_register(suite, test_list_union_unsorted_alloc_fail);
    cx_test_register(suite, test_list_union_sorted_alloc_fail);
    cx_test_register(suite, test_list_difference_unsorted);
    cx_test_register(suite, test_list_difference_sorted);
    cx_test_register(suite, test_list_difference_unsorted_alloc_fail);
    cx_test_register(suite, test_list_difference_sorted_alloc_fail);
    cx_test_register(suite, test_list_intersection_unsorted);
    cx_test_register(suite, test_list_intersection_sorted);
    cx_test_register(suite, test_list_intersection_unsorted_alloc_fail);
    cx_test_register(suite, test_list_intersection_sorted_alloc_fail);
    cx_test_register(suite, test_list_simple_clones);

    return suite;
}

CxTestSuite *cx_test_suite_list_corner_cases(void) {
    CxTestSuite *suite = cx_test_suite_new("list corner cases");

    cx_test_register(suite, test_list_pointer_list_supports_null);
    cx_test_register(suite, test_list_use_insert_unique_with_duplicates_in_source);
    cx_test_register(suite, test_list_use_insert_unique_to_remove_duplicates);

    return suite;
}