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#include <range/v3/view/sample.hpp>
#include <range/v3/algorithm/equal.hpp>
#include <numeric>
#include <vector>
#include <random>
#include "../simple_test.hpp"
#include "../test_utils.hpp"
using namespace ranges;
int main ()
{
std::mt19937 engine;
std::vector<int> pop(100);
std::iota(std::begin(pop), std::end(pop), 0);
{
constexpr int N = 32;
std::array<int, N> tmp;
auto rng = pop | views::sample(N, engine);
using Rng = decltype(rng);
CPP_assert(input_range<Rng> && view_<Rng>);
CPP_assert(!forward_range<Rng>);
ranges::copy(rng, tmp.begin());
rng = pop | views::sample(N, engine);
CHECK(!ranges::equal(rng, tmp));
engine = decltype(engine){};
rng = pop | views::sample(N, engine);
CHECK(ranges::equal(rng, tmp));
}
{
int const some_ints[] = {0,1,2,3,4,5,6,7,8};
auto rng = debug_input_view<int const>{some_ints} | views::sample(4, engine);
using Rng = decltype(rng);
CPP_assert(input_range<Rng> && view_<Rng>);
CPP_assert(!forward_range<Rng>);
CHECK(ranges::distance(rng) == 4);
}
return ::test_result();
}
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