diff options
| -rw-r--r-- | tests/test_macros.h | 3 | ||||
| -rw-r--r-- | tests/test_random_number_generator.h | 144 |
2 files changed, 147 insertions, 0 deletions
diff --git a/tests/test_macros.h b/tests/test_macros.h index 05fae128b3..ae6af93825 100644 --- a/tests/test_macros.h +++ b/tests/test_macros.h @@ -41,6 +41,9 @@ // The test is skipped with this, run pending tests with `--test --no-skip`. #define TEST_CASE_PENDING(name) TEST_CASE(name *doctest::skip()) +// The test case is marked as failed, but does not fail the entire test run. +#define TEST_CASE_MAY_FAIL(name) TEST_CASE(name *doctest::may_fail()) + // Temporarily disable error prints to test failure paths. // This allows to avoid polluting the test summary with error messages. // The `_print_error_enabled` boolean is defined in `core/print_string.cpp` and diff --git a/tests/test_random_number_generator.h b/tests/test_random_number_generator.h index 50ad5ee362..900bb55ffd 100644 --- a/tests/test_random_number_generator.h +++ b/tests/test_random_number_generator.h @@ -36,6 +36,150 @@ namespace TestRandomNumberGenerator { +TEST_CASE("[RandomNumberGenerator] Float") { + Ref<RandomNumberGenerator> rng = memnew(RandomNumberGenerator); + rng->set_seed(0); + + INFO("Should give float between 0.0 and 1.0."); + for (int i = 0; i < 1000; i++) { + real_t n = rng->randf(); + CHECK(n >= 0.0); + CHECK(n <= 1.0); + } +} + +TEST_CASE("[RandomNumberGenerator] Integer range via modulo") { + Ref<RandomNumberGenerator> rng = memnew(RandomNumberGenerator); + rng->set_seed(0); + + INFO("Should give integer between 0 and 100."); + for (int i = 0; i < 1000; i++) { + uint32_t n = rng->randi() % 100; + CHECK(n >= 0); + CHECK(n <= 100); + } +} + +TEST_CASE_MAY_FAIL("[RandomNumberGenerator] Integer 32 bit") { + Ref<RandomNumberGenerator> rng = memnew(RandomNumberGenerator); + rng->set_seed(0); // Change the seed if this fails. + + bool higher = false; + int i; + for (i = 0; i < 1000; i++) { + uint32_t n = rng->randi(); + if (n > 0x0fff'ffff) { + higher = true; + break; + } + } + INFO("Current seed: " << rng->get_seed()); + INFO("Current iteration: " << i); + CHECK_MESSAGE(higher, "Given current seed, this should give an integer higher than 0x0fff'ffff at least once."); +} + +TEST_CASE("[RandomNumberGenerator] Float and integer range") { + Ref<RandomNumberGenerator> rng = memnew(RandomNumberGenerator); + rng->set_seed(0); + uint64_t initial_state = rng->get_state(); + uint32_t initial_seed = rng->get_seed(); + + INFO("Should give float between -100.0 and 100.0, base test."); + for (int i = 0; i < 1000; i++) { + real_t n0 = rng->randf_range(-100.0, 100.0); + CHECK(n0 >= -100); + CHECK(n0 <= 100); + } + + rng->randomize(); + INFO("Should give float between -75.0 and 75.0."); + INFO("Shouldn't be affected by randomize."); + for (int i = 0; i < 1000; i++) { + real_t n1 = rng->randf_range(-75.0, 75.0); + CHECK(n1 >= -75); + CHECK(n1 <= 75); + } + + rng->set_state(initial_state); + INFO("Should give integer between -50 and 50."); + INFO("Shouldn't be affected by set_state."); + for (int i = 0; i < 1000; i++) { + real_t n2 = rng->randi_range(-50, 50); + CHECK(n2 >= -50); + CHECK(n2 <= 50); + } + + rng->set_seed(initial_seed); + INFO("Should give integer between -25 and 25."); + INFO("Shouldn't be affected by set_seed."); + for (int i = 0; i < 1000; i++) { + int32_t n3 = rng->randi_range(-25, 25); + CHECK(n3 >= -25); + CHECK(n3 <= 25); + } + + rng->randf(); + rng->randf(); + + INFO("Should give float between -10.0 and 10.0."); + INFO("Shouldn't be affected after generating new numbers."); + for (int i = 0; i < 1000; i++) { + real_t n4 = rng->randf_range(-10.0, 10.0); + CHECK(n4 >= -10); + CHECK(n4 <= 10); + } + + rng->randi(); + rng->randi(); + + INFO("Should give integer between -5 and 5."); + INFO("Shouldn't be affected after generating new numbers."); + for (int i = 0; i < 1000; i++) { + real_t n5 = rng->randf_range(-5, 5); + CHECK(n5 >= -5); + CHECK(n5 <= 5); + } +} + +TEST_CASE_MAY_FAIL("[RandomNumberGenerator] Normal distribution") { + Ref<RandomNumberGenerator> rng = memnew(RandomNumberGenerator); + rng->set_seed(1); // Change the seed if this fails. + INFO("Should give a number between -5 to 5 (5 std deviations away; above 99.7% chance it will be in this range)."); + INFO("Standard randfn function call."); + for (int i = 0; i < 100; i++) { + real_t n = rng->randfn(); + CHECK(n >= -5); + CHECK(n <= 5); + } + + INFO("Should give number between -5 to 5 after multiple randi/randf calls."); + INFO("5 std deviations away; above 99.7% chance it will be in this range."); + rng->randf(); + rng->randi(); + for (int i = 0; i < 100; i++) { + real_t n = rng->randfn(); + CHECK(n >= -5); + CHECK(n <= 5); + } + + INFO("Checks if user defined mean and deviation work properly."); + INFO("5 std deviations away; above 99.7% chance it will be in this range."); + for (int i = 0; i < 100; i++) { + real_t n = rng->randfn(5, 10); + CHECK(n >= -45); + CHECK(n <= 55); + } + + INFO("Checks if randfn works with changed seeds."); + INFO("5 std deviations away; above 99.7% chance it will be in this range."); + rng->randomize(); + for (int i = 0; i < 100; i++) { + real_t n = rng->randfn(3, 3); + CHECK(n >= -12); + CHECK(n <= 18); + } +} + TEST_CASE("[RandomNumberGenerator] Zero for first number immediately after seeding") { Ref<RandomNumberGenerator> rng = memnew(RandomNumberGenerator); rng->set_seed(0); |