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With the goal of centralizing all tests in the system, this is a first step to establish a Tests sub-tree. It will contain all of the unit tests and test harnesses for the various components in the system.
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Sahan Fernando <sahan.h.fernando@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/QuickSort.h>
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#include <AK/String.h>
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#include <AK/Vector.h>
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#include <stdio.h>
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#include <stdlib.h>
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const size_t NUM_RUNS = 100;
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struct SortableObject {
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int m_key;
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int m_payload;
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};
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static int compare_sortable_object(const void* a, const void* b)
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{
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const int key1 = static_cast<const SortableObject*>(a)->m_key;
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const int key2 = static_cast<const SortableObject*>(b)->m_key;
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if (key1 < key2) {
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return -1;
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} else if (key1 == key2) {
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return 0;
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} else {
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return 1;
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}
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}
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static int calc_payload_for_pos(size_t pos)
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{
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pos *= 231;
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return pos ^ (pos << 8) ^ (pos << 16) ^ (pos << 24);
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}
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static void shuffle_vec(Vector<SortableObject>& test_objects)
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{
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for (size_t i = 0; i < test_objects.size() * 3; ++i) {
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auto i1 = rand() % test_objects.size();
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auto i2 = rand() % test_objects.size();
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swap(test_objects[i1], test_objects[i2]);
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}
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}
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int main()
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{
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// Generate vector of SortableObjects in sorted order, with payloads determined by their sorted positions
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Vector<SortableObject> test_objects;
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for (auto i = 0; i < 1024; ++i) {
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test_objects.append({ i * 137, calc_payload_for_pos(i) });
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}
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for (size_t i = 0; i < NUM_RUNS; i++) {
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// Shuffle the vector, then sort it again
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shuffle_vec(test_objects);
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qsort(test_objects.data(), test_objects.size(), sizeof(SortableObject), compare_sortable_object);
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// Check that the objects are sorted by key
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for (auto i = 0u; i + 1 < test_objects.size(); ++i) {
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const auto& key1 = test_objects[i].m_key;
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const auto& key2 = test_objects[i + 1].m_key;
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if (key1 > key2) {
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printf("\x1b[01;35mTests failed: saw key %d before key %d\n", key1, key2);
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return 1;
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}
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}
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// Check that the object's payloads have not been corrupted
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for (auto i = 0u; i < test_objects.size(); ++i) {
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const auto expected = calc_payload_for_pos(i);
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const auto payload = test_objects[i].m_payload;
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if (payload != expected) {
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printf("\x1b[01;35mTests failed: expected payload %d for pos %u, got payload %d\n", expected, i, payload);
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return 1;
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}
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}
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}
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printf("PASS\n");
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return 0;
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}
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