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#include <unittest/unittest.h>
#include <thrust/extrema.h>

template<typename T>
struct TestMin
{
  void operator()(void)
  {
    // 2 < 3
    T two(2), three(3);
    ASSERT_EQUAL(two, thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (two,three));
    ASSERT_EQUAL(two, thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (two,three,thrust::less<T>()));

    ASSERT_EQUAL(two, thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (three,two));
    ASSERT_EQUAL(two, thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (three,two,thrust::less<T>()));

    ASSERT_EQUAL(three, thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (two,three,thrust::greater<T>()));
    ASSERT_EQUAL(three, thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (three,two,thrust::greater<T>()));

    typedef key_value<T,T> KV;
    KV two_and_two(two,two);
    KV two_and_three(two,three);

    // the first element breaks ties
    ASSERT_EQUAL_QUIET(two_and_two,   thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_two, two_and_three));
    ASSERT_EQUAL_QUIET(two_and_three, thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_three, two_and_two));

    ASSERT_EQUAL_QUIET(two_and_two,   thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_two, two_and_three, thrust::less<KV>()));
    ASSERT_EQUAL_QUIET(two_and_three, thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_three, two_and_two, thrust::less<KV>()));

    ASSERT_EQUAL_QUIET(two_and_two,   thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_two, two_and_three, thrust::greater<KV>()));
    ASSERT_EQUAL_QUIET(two_and_three, thrust::min THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_three, two_and_two, thrust::greater<KV>()));
  }
};
SimpleUnitTest<TestMin, NumericTypes> TestMinInstance;

template<typename T>
struct TestMax
{
  void operator()(void)
  {
    // 2 < 3
    T two(2), three(3);
    ASSERT_EQUAL(three, thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (two,three));
    ASSERT_EQUAL(three, thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (two,three,thrust::less<T>()));

    ASSERT_EQUAL(three, thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (three,two));
    ASSERT_EQUAL(three, thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (three,two,thrust::less<T>()));

    ASSERT_EQUAL(two, thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (two,three,thrust::greater<T>()));
    ASSERT_EQUAL(two, thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (three,two,thrust::greater<T>()));

    typedef key_value<T,T> KV;
    KV two_and_two(two,two);
    KV two_and_three(two,three);

    // the first element breaks ties
    ASSERT_EQUAL_QUIET(two_and_two,   thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_two, two_and_three));
    ASSERT_EQUAL_QUIET(two_and_three, thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_three, two_and_two));

    ASSERT_EQUAL_QUIET(two_and_two,   thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_two, two_and_three, thrust::less<KV>()));
    ASSERT_EQUAL_QUIET(two_and_three, thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_three, two_and_two, thrust::less<KV>()));

    ASSERT_EQUAL_QUIET(two_and_two,   thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_two, two_and_three, thrust::greater<KV>()));
    ASSERT_EQUAL_QUIET(two_and_three, thrust::max THRUST_PREVENT_MACRO_SUBSTITUTION (two_and_three, two_and_two, thrust::greater<KV>()));
  }
};
SimpleUnitTest<TestMax, NumericTypes> TestMaxInstance;