test/std/utilities/time/time.hms/time.hms.members/hours.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
// <chrono>

// template <class Duration>
// class hh_mm_ss
// 
// constexpr chrono::hours hours() const noexcept;
   
// Test values
// duration     hours   minutes seconds fractional
// 5000s            1       23      20      0
// 5000 minutes     83      20      0       0
// 123456789ms      34      17      36      789ms
// 123456789us      0       2       3       456789us
// 123456789ns      0       0       0       123456789ns
// 1000mfn          0       20      9       0.6 (6000/10000)
// 10000mfn         3       21      36      0


#include <chrono>
#include <cassert>

#include "test_macros.h"

template <typename Duration>
constexpr long check_hours(Duration d)
{
    using HMS = std::chrono::hh_mm_ss<Duration>;
    ASSERT_SAME_TYPE(std::chrono::hours, decltype(std::declval<HMS>().hours()));
    ASSERT_NOEXCEPT(                              std::declval<HMS>().hours());
    return HMS(d).hours().count();
}

int main(int, char**)
{
    using microfortnights = std::chrono::duration<int, std::ratio<756, 625>>;
    
    static_assert( check_hours(std::chrono::minutes( 1)) == 0, "");
    static_assert( check_hours(std::chrono::minutes(-1)) == 0, "");
    
    assert( check_hours(std::chrono::seconds( 5000)) == 1);
    assert( check_hours(std::chrono::seconds(-5000)) == 1);
    assert( check_hours(std::chrono::minutes( 5000)) == 83);
    assert( check_hours(std::chrono::minutes(-5000)) == 83);
    assert( check_hours(std::chrono::hours( 11))     == 11);
    assert( check_hours(std::chrono::hours(-11))     == 11);

    assert( check_hours(std::chrono::milliseconds( 123456789LL)) == 34);
    assert( check_hours(std::chrono::milliseconds(-123456789LL)) == 34);
    assert( check_hours(std::chrono::microseconds( 123456789LL)) ==  0);
    assert( check_hours(std::chrono::microseconds(-123456789LL)) ==  0);
    assert( check_hours(std::chrono::nanoseconds( 123456789LL))  ==  0);
    assert( check_hours(std::chrono::nanoseconds(-123456789LL))  ==  0);

    assert( check_hours(microfortnights(  1000)) == 0);
    assert( check_hours(microfortnights( -1000)) == 0);
    assert( check_hours(microfortnights( 10000)) == 3);
    assert( check_hours(microfortnights(-10000)) == 3);

    return 0;
}