tests/test_json.c

/*
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 *
 * Copyright 2024 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
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#include "cx/test.h"

#include "cx/json.h"

CX_TEST(test_json_init_default) {
    CxJson json;
    CX_TEST_DO {
        cxJsonInit(&json);
        CX_TEST_ASSERT(json.states == json.states_internal);
        CX_TEST_ASSERT(json.nstates == 0);
        CX_TEST_ASSERT(json.states_alloc == 8);
        CX_TEST_ASSERT(json.reader_array_alloc == 8);
    }
}

CX_TEST(test_json_simple_object) {
    cxstring text = cx_str(
            "{\n"
            "\t\"message\":\"success\",\n"
            "\t\"position\":{\n"
            "\t\t\"longitude\":-94.7099,\n"
            "\t\t\"latitude\":51.5539\n"
            "\t},\n"
            "\t\"timestamp\":1729348561,\n"
            "\t\"alive\":true\n"
            "}"
    );

    CX_TEST_DO {
        int result;

        CxJson json;
        cxJsonInit(&json);
        cxJsonFill(&json, text.ptr, text.length);

        // parse the big fat object
        CxJsonValue *obj;
        result = cxJsonNext(&json, &obj);
        CX_TEST_ASSERT(result == 1);

        // check the contents
        CX_TEST_ASSERT(cxJsonIsObject(obj));

        CxJsonValue *message = cxJsonObjGet(obj, "message");
        CX_TEST_ASSERT(cxJsonIsString(message));
        CX_TEST_ASSERT(0 == cx_strcmp(
                cx_strcast(cxJsonAsString(message)),
                cx_str("success"))
        );

        CxJsonValue *position = cxJsonObjGet(obj, "position");
        CX_TEST_ASSERT(cxJsonIsObject(position));
        CxJsonValue *longitude = cxJsonObjGet(position, "longitude");
        CX_TEST_ASSERT(cxJsonIsNumber(longitude));
        CX_TEST_ASSERT(cxJsonAsDouble(longitude) == -94.7099);
        CxJsonValue *latitude = cxJsonObjGet(position, "latitude");
        CX_TEST_ASSERT(cxJsonIsNumber(latitude));
        CX_TEST_ASSERT(cxJsonAsDouble(latitude) == 51.5539);

        CxJsonValue *timestamp = cxJsonObjGet(obj, "timestamp");
        CX_TEST_ASSERT(cxJsonIsInteger(timestamp));
        CX_TEST_ASSERT(cxJsonAsInteger(timestamp) == 1729348561);

        CxJsonValue *alive = cxJsonObjGet(obj, "alive");
        CX_TEST_ASSERT(cxJsonIsBool(alive));
        CX_TEST_ASSERT(cxJsonIsTrue(alive));
        CX_TEST_ASSERT(!cxJsonIsFalse(alive));
        CX_TEST_ASSERT(cxJsonAsBool(alive));

        // this recursively frees everything else
        cxJsonValueFree(obj);

        // we only have one object that already contained all the data
        result = cxJsonNext(&json, &obj);
        CX_TEST_ASSERT(result == 0);

        cxJsonDestroy(&json);
    }
}

CX_TEST(test_json_object_incomplete_token) {
    cxstring text = cx_str(
            "{\"message\":\"success\"  ,     \"__timestamp\":1729348561}");
    cxstring parts[16];
    size_t nparts = 0; // split the json text into mulple parts
    for(size_t i=0;i<text.length;i+=4) {
        parts[nparts++] = cx_strsubsl(text, i, 4);
    }
    
    CX_TEST_DO {
        int result;

        CxJson json;
        cxJsonInit(&json);
        CxJsonValue *obj;
        
        size_t part = 0;
        while(part < nparts) {
            cxJsonFill(&json, parts[part].ptr, parts[part].length);
            part++;
            result = cxJsonNext(&json, &obj);
            
            if(result != 0) {
                break;
            }
        }
        
        CX_TEST_ASSERT(result == 1);
        CX_TEST_ASSERT(part == nparts);
        CX_TEST_ASSERT(obj);
        
        CxJsonValue *message = cxJsonObjGet(obj, "message");
        CX_TEST_ASSERT(cxJsonIsString(message));
        CX_TEST_ASSERT(0 == cx_strcmp(
                cx_strcast(cxJsonAsString(message)),
                cx_str("success"))
        );
        CxJsonValue *timestamp = cxJsonObjGet(obj, "__timestamp");
        CX_TEST_ASSERT(message->type == CX_JSON_STRING);
        CX_TEST_ASSERT(cxJsonIsInteger(timestamp));
        CX_TEST_ASSERT(cxJsonAsInteger(timestamp) == 1729348561);
        
        // this recursively frees everything else
        cxJsonValueFree(obj);

        // we only have one object that already contained all the data
        result = cxJsonNext(&json, &obj);
        CX_TEST_ASSERT(result == 0);

        cxJsonDestroy(&json);
    }
}

CX_TEST(test_json_object_error) {
    cxstring text0 = cx_str(
            "{\n"
            "\t\"message\":\"success\",\n"
            "\t\"data\":{\n"
            "\t\t\"obj\":{\n"
            "\t\t\t\"array\": [1, 2, 3, ?syntaxerror? ]\n"
            "\t\t\"}\n"
            "\t},\n"
            "\t\"timestamp\":1729348561,\n"
            "}"
    );
    cxstring text1 = cx_str("{ \"string\" }");
    cxstring text2 = cx_str("{ \"a\" : }");
    cxstring text3 = cx_str("{ \"a\" : \"b\" ]");
    cxstring text4 = cx_str("{ \"name\": \"value\" ]");
    
    cxstring tests[] = { text0, text1, text2, text3, text4 };
    
    CX_TEST_DO {
        int result;
        CxJson json;
        CxJsonValue *obj = NULL;
        
        for(int i=0;i<5;i++) {
            cxJsonInit(&json);
            cxJsonFill(&json, tests[i].ptr, tests[i].length);
            result = cxJsonNext(&json, &obj);

            CX_TEST_ASSERT(result == -1);
            CX_TEST_ASSERT(obj == NULL);
            cxJsonDestroy(&json);
        }
    }
}

CX_TEST(test_json_large_nesting_depth) {
    CxJson json;
    CxJsonValue *d1;
    cxstring text = cx_str("{\"test\": [{},{\"foo\": [[{\"bar\":[4, 2, [null, {\"key\": 47}]]}]]}]}");
    CX_TEST_DO {
        cxJsonInit(&json);
        cxJsonFill(&json, text.ptr, text.length);
        cxJsonNext(&json, &d1);

        CX_TEST_ASSERT(d1 != NULL);
        CX_TEST_ASSERT(cxJsonIsObject(d1));
        CxJsonValue *d2 = cxJsonObjGet(d1, "test");
        CX_TEST_ASSERT(cxJsonIsArray(d2));
        CX_TEST_ASSERT(cxJsonArrSize(d2) == 2);
        CxJsonValue *d3 = cxJsonArrGet(d2, 1);
        CX_TEST_ASSERT(cxJsonIsObject(d3));
        CxJsonValue *d4 = cxJsonObjGet(d3, "foo");
        CX_TEST_ASSERT(cxJsonIsArray(d4));
        CX_TEST_ASSERT(cxJsonArrSize(d4) == 1);
        CxJsonValue *d5 = cxJsonArrGet(d4, 0);
        CX_TEST_ASSERT(cxJsonIsArray(d5));
        CX_TEST_ASSERT(cxJsonArrSize(d5) == 1);
        CxJsonValue *d6 = cxJsonArrGet(d5, 0);
        CX_TEST_ASSERT(cxJsonIsObject(d6));
        CxJsonValue *d7 = cxJsonObjGet(d6, "bar");
        CX_TEST_ASSERT(cxJsonIsArray(d7));
        CX_TEST_ASSERT(cxJsonArrSize(d7) == 3);
        CxJsonValue *d8 = cxJsonArrGet(d7, 2);
        CX_TEST_ASSERT(cxJsonIsArray(d8));
        CX_TEST_ASSERT(cxJsonArrSize(d8) == 2);
        CxJsonValue *d9a = cxJsonArrGet(d8, 0);
        CX_TEST_ASSERT(cxJsonIsNull(d9a));
        CxJsonValue *d9b = cxJsonArrGet(d8, 1);
        CX_TEST_ASSERT(cxJsonIsObject(d9b));
        CxJsonValue *d10 = cxJsonObjGet(d9b, "key");
        CX_TEST_ASSERT(cxJsonIsInteger(d10));
        CX_TEST_ASSERT(cxJsonAsInteger(d10) == 47);

        CX_TEST_ASSERT(json.states != json.states_internal);
        CX_TEST_ASSERT(json.states_alloc > cx_nmemb(json.states_internal));

        cxJsonDestroy(&json);
    }
}

CxTestSuite *cx_test_suite_json(void) {
    CxTestSuite *suite = cx_test_suite_new("json");

    cx_test_register(suite, test_json_init_default);
    cx_test_register(suite, test_json_simple_object);
    cx_test_register(suite, test_json_object_incomplete_token);
    cx_test_register(suite, test_json_object_error);
    cx_test_register(suite, test_json_large_nesting_depth);

    return suite;
}