test/test_map.cpp

Tue, 30 Aug 2022 19:34:22 +0200

author
Mike Becker <universe@uap-core.de>
date
Tue, 30 Aug 2022 19:34:22 +0200
changeset 577
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parent 563
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child 594
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permissions
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wrong position of struct identifier

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include "cx/hash_map.h"
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30 #include "cx/utils.h"
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31 #include "util_allocator.h"
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32
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33 #include <gtest/gtest.h>
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34 #include <unordered_map>
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35 #include <unordered_set>
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36
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37 struct map_operation {
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38 enum {
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39 put, rm
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40 } op;
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41 char const *key;
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42 char const *value;
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43 };
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44
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45 auto generate_map_operations() -> std::vector<map_operation> {
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46 return {
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47 {map_operation::put, "key 1", "test"},
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48 {map_operation::put, "key 2", "blub"},
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49 {map_operation::put, "key 3", "hallo"},
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50 {map_operation::put, "key 2", "foobar"},
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51 {map_operation::put, "key 4", "value 4"},
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52 {map_operation::put, "key 5", "value 5"},
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53 {map_operation::put, "key 6", "value 6"},
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54 {map_operation::rm, "key 4", nullptr},
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55 {map_operation::put, "key 7", "value 7"},
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56 {map_operation::put, "key 8", "value 8"},
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57 {map_operation::rm, "does not exist", nullptr},
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58 {map_operation::put, "key 9", "value 9"},
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59 {map_operation::put, "key 6", "other value"},
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60 {map_operation::put, "key 7", "something else"},
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61 {map_operation::rm, "key 8", nullptr},
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62 {map_operation::rm, "key 2", nullptr},
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63 {map_operation::put, "key 8", "new value"},
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64 };
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65 }
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66
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67 static void verify_map_contents(
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68 CxMap *map,
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69 std::unordered_map<std::string, std::string> const &refmap
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70 ) {
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71 // verify key iterator
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72 {
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73 auto keyiter = cxMapIteratorKeys(map);
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74 std::unordered_set<std::string> keys;
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75 cx_foreach(CxHashKey*, elem, keyiter) {
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76 // we use that our test keys contain NULL-terminated strings
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77 keys.insert(std::string(elem->data.cstr));
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78 }
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79 EXPECT_EQ(keyiter.index, map->size);
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80 ASSERT_EQ(keys.size(), map->size);
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81 for (auto &&k: keys) {
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82 EXPECT_NE(refmap.find(k), refmap.end());
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83 }
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84 }
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85
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86 // verify value iterator
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87 {
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88 auto valiter = cxMapIteratorValues(map);
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89 std::unordered_set<std::string> values; // we use that the values in our test data are unique strings
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90 cx_foreach(char const*, elem, valiter) {
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91 values.insert(std::string(elem));
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92 }
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93 EXPECT_EQ(valiter.index, map->size);
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94 ASSERT_EQ(values.size(), map->size);
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95 for (auto &&v: values) {
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96 EXPECT_NE(std::find_if(refmap.begin(), refmap.end(),
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97 [v](auto const &e) { return e.second == v; }), refmap.end());
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98 }
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99 }
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100
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101 // verify pair iterator
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102 {
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103 auto pairiter = cxMapIterator(map);
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104 std::unordered_map<std::string, std::string> pairs;
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105 cx_foreach(CxMapEntry*, entry, pairiter) {
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106 pairs[std::string(entry->key->data.cstr)] = std::string((char *) entry->value);
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107 }
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108 EXPECT_EQ(pairiter.index, map->size);
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109 ASSERT_EQ(pairs.size(), refmap.size());
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110 for (auto &&p: pairs) {
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111 ASSERT_EQ(p.second, refmap.at(p.first));
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112 }
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113 }
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114 }
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115
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116 TEST(CxHashMap, Create) {
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117 CxTestingAllocator allocator;
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118 auto map = cxHashMapCreate(&allocator, 0);
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119 auto hmap = reinterpret_cast<struct cx_hash_map_s *>(map);
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120 EXPECT_GT(hmap->bucket_count, 0);
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121 cx_for_n(i, hmap->bucket_count) {
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122 EXPECT_EQ(hmap->buckets[i], nullptr);
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123 }
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124 EXPECT_EQ(map->size, 0);
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125 EXPECT_EQ(map->allocator, &allocator);
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126
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127 cxMapDestroy(map);
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128 EXPECT_TRUE(allocator.verify());
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129 }
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130
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131 TEST(CxHashMap, BasicOperations) {
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132 // create the map
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133 CxTestingAllocator allocator;
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134 auto map = cxHashMapCreate(&allocator, 8);
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135
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136 // create a reference map
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137 std::unordered_map<std::string, std::string> refmap;
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138
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139 // generate operations
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140 auto ops = generate_map_operations();
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141
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142 // verify iterators for empty map
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143 verify_map_contents(map, refmap);
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144
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145 // execute operations and verify results
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146 for (auto &&op: ops) {
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147 CxHashKey key = cx_hash_key_str(op.key);
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148 key.hash = 0; // force the hash map to compute the hash
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149 if (op.op == map_operation::put) {
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150 // execute a put operation and verify that the exact value can be read back
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151 refmap[std::string(op.key)] = std::string(op.value);
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152 int result = cxMapPut(map, key, (void *) op.value);
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153 EXPECT_EQ(result, 0);
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154 auto added = cxMapGet(map, key);
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155 EXPECT_EQ(memcmp(op.value, added, strlen(op.value)), 0);
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156 } else {
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157 // execute a remove and verify that the removed element was returned (or nullptr)
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158 auto found = refmap.find(op.key);
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159 auto removed = cxMapRemove(map, key);
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160 if (found == refmap.end()) {
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161 EXPECT_EQ(removed, nullptr);
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162 } else {
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163 EXPECT_EQ(std::string((char *) removed), found->second);
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164 refmap.erase(found);
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165 }
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166 }
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167 // compare the current map state with the reference map
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168 verify_map_contents(map, refmap);
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169 }
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170
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171 // destroy the map and verify the memory (de)allocations
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172 cxMapDestroy(map);
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173 EXPECT_TRUE(allocator.verify());
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174 }
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175
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176 TEST(CxHashMap, RemoveViaIterator) {
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177 CxTestingAllocator allocator;
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178 auto map = cxHashMapCreate(&allocator, 4);
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179
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180 cxMapPut(map, cx_hash_key_str("key 1"), (void *) "val 1");
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181 cxMapPut(map, cx_hash_key_str("key 2"), (void *) "val 2");
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182 cxMapPut(map, cx_hash_key_str("key 3"), (void *) "val 3");
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183 cxMapPut(map, cx_hash_key_str("key 4"), (void *) "val 4");
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184 cxMapPut(map, cx_hash_key_str("key 5"), (void *) "val 5");
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185 cxMapPut(map, cx_hash_key_str("key 6"), (void *) "val 6");
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186
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187 auto iter = cxMapIterator(map);
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188 cx_foreach(CxMapEntry*, entry, iter) {
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189 if (entry->key->data.cstr[4] % 2 == 1) iter.remove = true;
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190 }
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191 EXPECT_EQ(map->size, 3);
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192 EXPECT_EQ(iter.index, map->size);
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193
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194 EXPECT_EQ(cxMapGet(map, cx_hash_key_str("key 1")), nullptr);
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195 EXPECT_NE(cxMapGet(map, cx_hash_key_str("key 2")), nullptr);
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196 EXPECT_EQ(cxMapGet(map, cx_hash_key_str("key 3")), nullptr);
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197 EXPECT_NE(cxMapGet(map, cx_hash_key_str("key 4")), nullptr);
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198 EXPECT_EQ(cxMapGet(map, cx_hash_key_str("key 5")), nullptr);
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199 EXPECT_NE(cxMapGet(map, cx_hash_key_str("key 6")), nullptr);
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200
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201 cxMapDestroy(map);
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202 EXPECT_TRUE(allocator.verify());
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203 }
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204
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205 TEST(CxHashMap, RehashNotRequired) {
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206 CxTestingAllocator allocator;
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207 auto map = cxHashMapCreate(&allocator, 8);
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208
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209 cxMapPut(map, cx_hash_key_str("key 1"), (void *) "val 1");
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210 cxMapPut(map, cx_hash_key_str("key 2"), (void *) "val 2");
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211 cxMapPut(map, cx_hash_key_str("key 3"), (void *) "val 3");
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212 cxMapPut(map, cx_hash_key_str("key 4"), (void *) "val 4");
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213 cxMapPut(map, cx_hash_key_str("key 5"), (void *) "val 5");
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214 cxMapPut(map, cx_hash_key_str("key 6"), (void *) "val 6");
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215
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216 // 6/8 does not exceed 0.75, therefore the function should not rehash
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217 int result = cxMapRehash(map);
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218 EXPECT_EQ(result, 0);
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219 EXPECT_EQ(reinterpret_cast<struct cx_hash_map_s *>(map)->bucket_count, 8);
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220
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221 cxMapDestroy(map);
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222 EXPECT_TRUE(allocator.verify());
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223 }
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224
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225 TEST(CxHashMap, Rehash) {
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226 CxTestingAllocator allocator;
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227 auto map = cxHashMapCreate(&allocator, 8);
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228
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229 cxMapPut(map, cx_hash_key_str("key 1"), (void *) "val 1");
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230 cxMapPut(map, cx_hash_key_str("key 2"), (void *) "val 2");
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231 cxMapPut(map, cx_hash_key_str("key 3"), (void *) "val 3");
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232 cxMapPut(map, cx_hash_key_str("key 4"), (void *) "val 4");
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233 cxMapPut(map, cx_hash_key_str("key 5"), (void *) "val 5");
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234 cxMapPut(map, cx_hash_key_str("key 6"), (void *) "val 6");
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235 cxMapPut(map, cx_hash_key_str("key 7"), (void *) "val 7");
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236
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237 int result = cxMapRehash(map);
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238 EXPECT_EQ(result, 0);
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239 EXPECT_EQ(reinterpret_cast<struct cx_hash_map_s *>(map)->bucket_count, 17);
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240 EXPECT_EQ(map->size, 7);
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241
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242 EXPECT_EQ(strcmp((char *) cxMapGet(map, cx_hash_key_str("key 1")), "val 1"), 0);
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243 EXPECT_EQ(strcmp((char *) cxMapGet(map, cx_hash_key_str("key 2")), "val 2"), 0);
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244 EXPECT_EQ(strcmp((char *) cxMapGet(map, cx_hash_key_str("key 3")), "val 3"), 0);
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245 EXPECT_EQ(strcmp((char *) cxMapGet(map, cx_hash_key_str("key 4")), "val 4"), 0);
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246 EXPECT_EQ(strcmp((char *) cxMapGet(map, cx_hash_key_str("key 5")), "val 5"), 0);
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247 EXPECT_EQ(strcmp((char *) cxMapGet(map, cx_hash_key_str("key 6")), "val 6"), 0);
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248 EXPECT_EQ(strcmp((char *) cxMapGet(map, cx_hash_key_str("key 7")), "val 7"), 0);
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249
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250 cxMapDestroy(map);
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251 EXPECT_TRUE(allocator.verify());
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252 }

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