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crate::ix!();
//-------------------------------------------[.cpp/bitcoin/src/test/random_tests.cpp]
#[cfg(test)]
#[fixture(BasicTestingSetup)]
pub mod random_tests {
#[test] fn osrandom_tests() {
todo!();
/*
BOOST_CHECK(Random_SanityCheck());
*/
}
#[test] fn fastrandom_tests() {
todo!();
/*
// Check that deterministic FastRandomContexts are deterministic
g_mock_deterministic_tests = true;
FastRandomContext ctx1(true);
FastRandomContext ctx2(true);
for (int i = 10; i > 0; --i) {
BOOST_CHECK_EQUAL(GetRand(std::numeric_limits<uint64_t>::max()), uint64_t{10393729187455219830U});
BOOST_CHECK_EQUAL(GetRandInt(std::numeric_limits<int>::max()), int{769702006});
BOOST_CHECK_EQUAL(GetRandMicros(std::chrono::hours{1}).count(), 2917185654);
BOOST_CHECK_EQUAL(GetRandMillis(std::chrono::hours{1}).count(), 2144374);
}
BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32());
BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32());
BOOST_CHECK_EQUAL(ctx1.rand64(), ctx2.rand64());
BOOST_CHECK_EQUAL(ctx1.randbits(3), ctx2.randbits(3));
BOOST_CHECK(ctx1.randbytes(17) == ctx2.randbytes(17));
BOOST_CHECK(ctx1.rand256() == ctx2.rand256());
BOOST_CHECK_EQUAL(ctx1.randbits(7), ctx2.randbits(7));
BOOST_CHECK(ctx1.randbytes(128) == ctx2.randbytes(128));
BOOST_CHECK_EQUAL(ctx1.rand32(), ctx2.rand32());
BOOST_CHECK_EQUAL(ctx1.randbits(3), ctx2.randbits(3));
BOOST_CHECK(ctx1.rand256() == ctx2.rand256());
BOOST_CHECK(ctx1.randbytes(50) == ctx2.randbytes(50));
// Check that a nondeterministic ones are not
g_mock_deterministic_tests = false;
for (int i = 10; i > 0; --i) {
BOOST_CHECK(GetRand(std::numeric_limits<uint64_t>::max()) != uint64_t{10393729187455219830U});
BOOST_CHECK(GetRandInt(std::numeric_limits<int>::max()) != int{769702006});
BOOST_CHECK(GetRandMicros(std::chrono::hours{1}) != std::chrono::microseconds{2917185654});
BOOST_CHECK(GetRandMillis(std::chrono::hours{1}) != std::chrono::milliseconds{2144374});
}
{
FastRandomContext ctx3, ctx4;
BOOST_CHECK(ctx3.rand64() != ctx4.rand64()); // extremely unlikely to be equal
}
{
FastRandomContext ctx3, ctx4;
BOOST_CHECK(ctx3.rand256() != ctx4.rand256());
}
{
FastRandomContext ctx3, ctx4;
BOOST_CHECK(ctx3.randbytes(7) != ctx4.randbytes(7));
}
*/
}
#[test] fn fastrandom_randbits() {
todo!();
/*
FastRandomContext ctx1;
FastRandomContext ctx2;
for (int bits = 0; bits < 63; ++bits) {
for (int j = 0; j < 1000; ++j) {
uint64_t rangebits = ctx1.randbits(bits);
BOOST_CHECK_EQUAL(rangebits >> bits, 0U);
uint64_t range = ((uint64_t)1) << bits | rangebits;
uint64_t rand = ctx2.randrange(range);
BOOST_CHECK(rand < range);
}
}
*/
}
/**
| Does-it-compile test for compatibility
| with standard C++11 RNG interface.
|
*/
#[test] fn stdrandom_test() {
todo!();
/*
FastRandomContext ctx;
std::uniform_int_distribution<int> distribution(3, 9);
for (int i = 0; i < 100; ++i) {
int x = distribution(ctx);
BOOST_CHECK(x >= 3);
BOOST_CHECK(x <= 9);
std::vector<int> test{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
std::shuffle(test.begin(), test.end(), ctx);
for (int j = 1; j <= 10; ++j) {
BOOST_CHECK(std::find(test.begin(), test.end(), j) != test.end());
}
Shuffle(test.begin(), test.end(), ctx);
for (int j = 1; j <= 10; ++j) {
BOOST_CHECK(std::find(test.begin(), test.end(), j) != test.end());
}
}
*/
}
/**
| Test that Shuffle reaches every permutation
| with equal probability.
|
*/
#[test] fn shuffle_stat_test() {
todo!();
/*
FastRandomContext ctx(true);
uint32_t counts[5 * 5 * 5 * 5 * 5] = {0};
for (int i = 0; i < 12000; ++i) {
int data[5] = {0, 1, 2, 3, 4};
Shuffle(std::begin(data), std::end(data), ctx);
int pos = data[0] + data[1] * 5 + data[2] * 25 + data[3] * 125 + data[4] * 625;
++counts[pos];
}
unsigned int sum = 0;
double chi_score = 0.0;
for (int i = 0; i < 5 * 5 * 5 * 5 * 5; ++i) {
int i1 = i % 5, i2 = (i / 5) % 5, i3 = (i / 25) % 5, i4 = (i / 125) % 5, i5 = i / 625;
uint32_t count = counts[i];
if (i1 == i2 || i1 == i3 || i1 == i4 || i1 == i5 || i2 == i3 || i2 == i4 || i2 == i5 || i3 == i4 || i3 == i5 || i4 == i5) {
BOOST_CHECK(count == 0);
} else {
chi_score += ((count - 100.0) * (count - 100.0)) / 100.0;
BOOST_CHECK(count > 50);
BOOST_CHECK(count < 150);
sum += count;
}
}
BOOST_CHECK(chi_score > 58.1411); // 99.9999% confidence interval
BOOST_CHECK(chi_score < 210.275);
BOOST_CHECK_EQUAL(sum, 12000U);
*/
}
}