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#include "common_ops.h"
#include "random.h"
#include <library/cpp/testing/unittest/registar.h>
#include <util/digest/numeric.h>
#include <random>
Y_UNIT_TEST_SUITE(TestCommonRNG) {
template <class T>
struct TRng: public TCommonRNG<T, TRng<T>> {
inline T GenRand() noexcept {
return IntHash(C_++);
}
T C_ = RandomNumber<T>();
};
Y_UNIT_TEST(TestUniform1) {
TRng<ui32> r;
for (size_t i = 0; i < 1000; ++i) {
UNIT_ASSERT(r.Uniform(10) < 10);
}
}
Y_UNIT_TEST(TestUniform2) {
TRng<ui32> r;
for (size_t i = 0; i < 1000; ++i) {
UNIT_ASSERT(r.Uniform(1) == 0);
}
}
Y_UNIT_TEST(TestUniform3) {
TRng<ui32> r;
for (size_t i = 0; i < 1000; ++i) {
auto x = r.Uniform(100, 200);
UNIT_ASSERT(x >= 100);
UNIT_ASSERT(x < 200);
}
}
Y_UNIT_TEST(TestStlCompatibility) {
{
TRng<ui32> r;
r.C_ = 17;
std::normal_distribution<float> nd(0, 1);
UNIT_ASSERT_DOUBLES_EQUAL(nd(r), -0.877167, 0.01);
}
{
TRng<ui64> r;
r.C_ = 17;
std::normal_distribution<double> nd(0, 1);
UNIT_ASSERT_DOUBLES_EQUAL(nd(r), -0.5615566731, 0.01);
}
{
TRng<ui16> r;
r.C_ = 17;
std::normal_distribution<long double> nd(0, 1);
UNIT_ASSERT_DOUBLES_EQUAL(nd(r), -0.430375088, 0.01);
}
}
}
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