120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
#ifdef TESTS_BUILD
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#define CATCH_CONFIG_MAIN
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#include "../extern/catch.hpp"
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#include "../src/Random.hpp"
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TEST_CASE("Random ints", "[Utilities]") {
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auto rand = Arbutils::Random(10);
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CHECK(rand.Get() == 1656398469);
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CHECK(rand.Get() == 641584702);
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CHECK(rand.Get() == 44564466);
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CHECK(rand.Get() == 1062123783);
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CHECK(rand.Get() == 1360749216);
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CHECK(rand.Get() == 951367352);
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CHECK(rand.Get() == 1608044094);
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CHECK(rand.Get() == 1786516046);
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CHECK(rand.Get() == 1070535660);
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CHECK(rand.Get() == 1252673902);
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}
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TEST_CASE("Random ints with limit", "[Utilities]") {
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auto rand = Arbutils::Random(10);
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CHECK(rand.Get(10) == 7);
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CHECK(rand.Get(10) == 2);
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CHECK(rand.Get(10) == 0);
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CHECK(rand.Get(10) == 4);
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CHECK(rand.Get(10) == 6);
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CHECK(rand.Get(10) == 4);
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CHECK(rand.Get(10) == 7);
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CHECK(rand.Get(10) == 8);
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CHECK(rand.Get(10) == 4);
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CHECK(rand.Get(10) == 5);
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CHECK(rand.Get(2) == 0);
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CHECK(rand.Get(2) == 0);
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CHECK(rand.Get(2) == 0);
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CHECK(rand.Get(2) == 1);
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CHECK(rand.Get(2) == 1);
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CHECK(rand.Get(2) == 0);
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CHECK(rand.Get(2) == 0);
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CHECK(rand.Get(2) == 0);
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CHECK(rand.Get(2) == 0);
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}
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TEST_CASE("Random ints with upper and bottom", "[Utilities]") {
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auto rand = Arbutils::Random(10);
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CHECK(rand.Get(10, 30) == 25);
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CHECK(rand.Get(10, 30) == 15);
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CHECK(rand.Get(10, 30) == 10);
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CHECK(rand.Get(10, 30) == 19);
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CHECK(rand.Get(10, 30) == 22);
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CHECK(rand.Get(10, 30) == 18);
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CHECK(rand.Get(10, 30) == 24);
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CHECK(rand.Get(10, 30) == 26);
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CHECK(rand.Get(10, 30) == 19);
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CHECK(rand.Get(10, 30) == 21);
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}
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TEST_CASE("Random distribution (max 0, min 1)", "[Utilities]") {
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auto rand = Arbutils::Random(10);
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const int size = 100000;
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int arr[size];
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for (size_t i = 0; i < size; i++) {
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arr[i] = rand.Get(0, 1);
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}
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for (size_t i = 0; i < size; i++) {
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if (arr[i] != 0)
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FAIL("We expected a value of 0 here, but got a " + std::to_string(arr[i]));
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}
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}
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TEST_CASE("Random distribution (max 0, min 2)", "[Utilities]") {
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auto rand = Arbutils::Random(10);
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const int size = 100000;
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int arr[size];
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for (size_t i = 0; i < size; i++) {
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arr[i] = rand.Get(0, 2);
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}
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auto numZeros = 0;
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auto numOnes = 0;
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for (size_t i = 0; i < size; i++) {
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if (arr[i] != 0 && arr[i] != 1)
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FAIL("We expected a value of 0 or 1 here, but got a " + std::to_string(arr[i]));
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if (arr[i] == 0)
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numZeros++;
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else
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numOnes++;
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}
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auto div = static_cast<float>(numZeros) / static_cast<float>(numOnes);
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INFO("Distribution: " << numZeros << "/" << numOnes);
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CHECK(Approx(div).margin(0.01) == 1);
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}
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TEST_CASE("Random distribution (max 0, min 3)", "[Utilities]") {
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auto rand = Arbutils::Random(10);
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const int size = 100000;
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int arr[size];
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for (size_t i = 0; i < size; i++) {
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arr[i] = rand.Get(0, 3);
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}
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auto numZeros = 0;
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auto numOnes = 0;
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auto numTwos = 0;
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for (size_t i = 0; i < size; i++) {
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if (arr[i] != 0 && arr[i] != 1 && arr[i] != 2)
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FAIL("We expected a value between 0 and 2 here, but got a " + std::to_string(arr[i]));
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if (arr[i] == 0)
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numZeros++;
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else if (arr[i] == 1)
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numOnes++;
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else
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numTwos++;
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}
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INFO("Distribution: " << numZeros << "/" << numOnes << "/" << numTwos);
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CHECK(Approx(static_cast<float>(numZeros) / static_cast<float>(numOnes)).margin(0.01) == 1);
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CHECK(Approx(static_cast<float>(numZeros) / static_cast<float>(numTwos)).margin(0.01) == 1);
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CHECK(Approx(static_cast<float>(numOnes) / static_cast<float>(numTwos)).margin(0.01) == 1);
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}
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#endif |