133 lines
4.2 KiB
C
133 lines
4.2 KiB
C
/**
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* Copyright (c) 2026 Dominic Masters
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*
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* This software is released under the MIT License.
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* https://opensource.org/licenses/MIT
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*/
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#include "dusktest.h"
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#include <SDL2/SDL.h>
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// Mocks
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static uint64_t SDL_GETTICKS_TICKS = 0;
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static bool_t SDL_GETTICKS_CALLED = false;
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uint64_t SDL_GetTicks64(void) {
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SDL_GETTICKS_CALLED = true;
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return SDL_GETTICKS_TICKS;
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}
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// Mocked includes
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#include "util/memory.h"
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#include "time/time.h"
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// Tests
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static void test_timeInit(void **state) {
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(void)state;
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// Fill time with garbage
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memorySet(&TIME, 0xFF, sizeof(TIME));
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// Init
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timeInit();
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// Inital struct is set.
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assert_float_equal(TIME.time, TIME_STEP, 0.0001f);
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assert_float_equal(TIME.delta, TIME_STEP, 0.0001f);
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assert_float_equal(TIME.dynamicTime, TIME_STEP, 0.0001f);
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assert_float_equal(TIME.dynamicDelta, TIME_STEP, 0.0001f);
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assert_false(TIME.dynamicUpdate);
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}
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static void test_timeUpdate(void **state) {
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(void)state;
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// Init first
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timeInit();
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// First time update, calls SDL_GetTicks
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SDL_GETTICKS_TICKS = 14; // Simulate 15ms elapsed (just barely not one step)
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SDL_GETTICKS_CALLED = false;
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timeUpdate();
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assert_true(SDL_GETTICKS_CALLED);
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assert_true(TIME.dynamicUpdate);
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assert_float_equal(TIME.dynamicDelta, 0.014f, 0.0001f);
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assert_float_equal(TIME.dynamicTime, TIME_STEP + TIME.dynamicDelta, 0.0001f);
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assert_float_equal(TIME.delta, TIME_STEP, 0.0001f); // Not changed
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assert_float_equal(TIME.time, TIME_STEP, 0.0001f); // Not changed
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// Simulate total 16ms elapsed (2ms more)
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SDL_GETTICKS_TICKS = 16;
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SDL_GETTICKS_CALLED = false;
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timeUpdate();
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assert_true(SDL_GETTICKS_CALLED);
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assert_false(TIME.dynamicUpdate);
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assert_float_equal(TIME.dynamicDelta, 0.002f, 0.0001f);
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assert_float_equal(TIME.dynamicTime, TIME_STEP * 2, 0.0001f);
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assert_float_equal(TIME.delta, TIME_STEP, 0.0001f);
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assert_float_equal(TIME.time, TIME_STEP * 2, 0.0001f); // Stepped once
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// Second test, half step (16 + 8)
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SDL_GETTICKS_TICKS = 24;
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SDL_GETTICKS_CALLED = false;
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timeUpdate();
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assert_true(SDL_GETTICKS_CALLED);
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assert_true(TIME.dynamicUpdate);
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assert_float_equal(TIME.dynamicDelta, 0.008f, 0.0001f);
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assert_float_equal(TIME.dynamicTime, TIME_STEP + 0.024f, 0.0001f);
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assert_float_equal(TIME.delta, TIME_STEP, 0.0001f);
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assert_float_equal(TIME.time, TIME_STEP * 2, 0.0001f);// Unchanged.
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// Third test, another half step, leading to non dynamic update
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SDL_GETTICKS_TICKS = 32;
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SDL_GETTICKS_CALLED = false;
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timeUpdate();
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assert_true(SDL_GETTICKS_CALLED);
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assert_false(TIME.dynamicUpdate);
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assert_float_equal(TIME.dynamicDelta, 0.008f, 0.0001f);
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assert_float_equal(TIME.dynamicTime, TIME_STEP + 0.032f, 0.0001f);
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assert_float_equal(TIME.delta, TIME_STEP, 0.0001f);
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assert_float_equal(TIME.time, TIME_STEP * 3, 0.0001f);
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// Fourth test, large jump, should only step once
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SDL_GETTICKS_TICKS = 100; // Simulate 100ms elapsed
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SDL_GETTICKS_CALLED = false;
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timeUpdate();
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assert_true(SDL_GETTICKS_CALLED);
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assert_false(TIME.dynamicUpdate);
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assert_float_equal(TIME.dynamicDelta, 0.068f, 0.0001f);
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assert_float_equal(TIME.dynamicTime, TIME_STEP + 0.100f, 0.0001f);
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assert_float_equal(TIME.delta, TIME_STEP, 0.0001f);
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assert_float_equal(TIME.time, TIME_STEP * 4, 0.0001f);
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// Fifth test, despite a small time passing the game should not start
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// trying to run ahead
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SDL_GETTICKS_TICKS = 104; // Simulate 4ms elapsed
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SDL_GETTICKS_CALLED = false;
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timeUpdate();
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assert_true(SDL_GETTICKS_CALLED);
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assert_true(TIME.dynamicUpdate);
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assert_float_equal(TIME.dynamicDelta, 0.004f, 0.0001f);
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assert_float_equal(TIME.dynamicTime, TIME_STEP + 0.104f, 0.0001f);
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assert_float_equal(TIME.delta, TIME_STEP, 0.0001f);
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assert_float_equal(TIME.time, TIME_STEP * 4, 0.0001f);
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// Time can stand still if needed
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SDL_GETTICKS_CALLED = false;
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SDL_GETTICKS_TICKS = 104; // No time elapsed
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timeUpdate();
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assert_true(SDL_GETTICKS_CALLED);
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// Time cannot go backwards
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SDL_GETTICKS_TICKS = 90;
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SDL_GETTICKS_CALLED = false;
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expect_assert_failure(timeUpdate());
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}
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int main(int argc, char **argv) {
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const struct CMUnitTest tests[] = {
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cmocka_unit_test(test_timeInit),
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cmocka_unit_test(test_timeUpdate),
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};
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return cmocka_run_group_tests(tests, NULL, NULL);
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} |