mirror of
https://github.com/godotengine/godot.git
synced 2024-12-21 10:25:24 +08:00
faab6ff97a
The comma operator should be preferred now according to doctest. Moved macro aliases from `ClassDB` tests to `test_macros.h`, because those are also used in `TextServer` tests.
276 lines
9.2 KiB
C++
276 lines
9.2 KiB
C++
/*************************************************************************/
|
|
/* test_random_number_generator.h */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#ifndef TEST_RANDOM_NUMBER_GENERATOR_H
|
|
#define TEST_RANDOM_NUMBER_GENERATOR_H
|
|
|
|
#include "core/math/random_number_generator.h"
|
|
#include "tests/test_macros.h"
|
|
|
|
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);
|
|
uint32_t n1 = rng->randi();
|
|
uint32_t n2 = rng->randi();
|
|
INFO("Initial random values: ", n1, " ", n2);
|
|
CHECK(n1 != 0);
|
|
|
|
rng->set_seed(1);
|
|
uint32_t n3 = rng->randi();
|
|
uint32_t n4 = rng->randi();
|
|
INFO("Values after changing the seed: ", n3, " ", n4);
|
|
CHECK(n3 != 0);
|
|
}
|
|
|
|
TEST_CASE("[RandomNumberGenerator] Restore state") {
|
|
Ref<RandomNumberGenerator> rng = memnew(RandomNumberGenerator);
|
|
rng->randomize();
|
|
uint64_t last_seed = rng->get_seed();
|
|
INFO("Current seed: ", last_seed);
|
|
|
|
rng->randi();
|
|
rng->randi();
|
|
|
|
CHECK_MESSAGE(rng->get_seed() == last_seed,
|
|
"The seed should remain the same after generating some numbers");
|
|
|
|
uint64_t saved_state = rng->get_state();
|
|
INFO("Current state: ", saved_state);
|
|
|
|
real_t f1_before = rng->randf();
|
|
real_t f2_before = rng->randf();
|
|
INFO("This seed produces: ", f1_before, " ", f2_before);
|
|
|
|
// Restore now.
|
|
rng->set_state(saved_state);
|
|
|
|
real_t f1_after = rng->randf();
|
|
real_t f2_after = rng->randf();
|
|
INFO("Resetting the state produces: ", f1_after, " ", f2_after);
|
|
|
|
String msg = "Should restore the sequence of numbers after resetting the state";
|
|
CHECK_MESSAGE(f1_before == f1_after, msg);
|
|
CHECK_MESSAGE(f2_before == f2_after, msg);
|
|
}
|
|
|
|
TEST_CASE("[RandomNumberGenerator] Restore from seed") {
|
|
Ref<RandomNumberGenerator> rng = memnew(RandomNumberGenerator);
|
|
rng->set_seed(0);
|
|
INFO("Current seed: ", rng->get_seed());
|
|
uint32_t s0_1_before = rng->randi();
|
|
uint32_t s0_2_before = rng->randi();
|
|
INFO("This seed produces: ", s0_1_before, " ", s0_2_before);
|
|
|
|
rng->set_seed(9000);
|
|
INFO("Current seed: ", rng->get_seed());
|
|
uint32_t s9000_1 = rng->randi();
|
|
uint32_t s9000_2 = rng->randi();
|
|
INFO("This seed produces: ", s9000_1, " ", s9000_2);
|
|
|
|
rng->set_seed(0);
|
|
INFO("Current seed: ", rng->get_seed());
|
|
uint32_t s0_1_after = rng->randi();
|
|
uint32_t s0_2_after = rng->randi();
|
|
INFO("This seed produces: ", s0_1_after, " ", s0_2_after);
|
|
|
|
String msg = "Should restore the sequence of numbers after resetting the seed";
|
|
CHECK_MESSAGE(s0_1_before == s0_1_after, msg);
|
|
CHECK_MESSAGE(s0_2_before == s0_2_after, msg);
|
|
}
|
|
|
|
TEST_CASE_MAY_FAIL("[RandomNumberGenerator] randi_range bias check") {
|
|
int zeros = 0;
|
|
int ones = 0;
|
|
Ref<RandomNumberGenerator> rng = memnew(RandomNumberGenerator);
|
|
for (int i = 0; i < 10000; i++) {
|
|
int val = rng->randi_range(0, 1);
|
|
val == 0 ? zeros++ : ones++;
|
|
}
|
|
CHECK_MESSAGE(abs(zeros * 1.0 / ones - 1.0) < 0.1, "The ratio of zeros to ones should be nearly 1");
|
|
|
|
int vals[10] = { 0 };
|
|
for (int i = 0; i < 1000000; i++) {
|
|
vals[rng->randi_range(0, 9)]++;
|
|
}
|
|
|
|
for (int i = 0; i < 10; i++) {
|
|
CHECK_MESSAGE(abs(vals[i] / 1000000.0 - 0.1) < 0.01, "Each element should appear roughly 10% of the time");
|
|
}
|
|
}
|
|
} // namespace TestRandomNumberGenerator
|
|
|
|
#endif // TEST_RANDOM_NUMBER_GENERATOR_H
|