static void ReverseTestHelper <T, TSize>(T start, bool isStartIncluded, TSize addition, bool isEndIncluded)
where T : IComparable <T>
where TSize : IComparable <TSize>
{
IInterval <T, TSize> interval = NewInterval(start, addition, isStartIncluded, isEndIncluded);
T small = interval.Start;
T big = interval.End;
bool smallIncluded = interval.IsStartIncluded;
bool bigIncluded = interval.IsEndIncluded;
interval = interval.Reverse();
Assert.True(interval.IsReversed);
Assert.Equal(small, interval.End);
Assert.Equal(smallIncluded, interval.IsEndIncluded);
Assert.Equal(big, interval.Start);
Assert.Equal(bigIncluded, interval.IsStartIncluded);
interval = interval.Reverse();
Assert.False(interval.IsReversed);
Assert.Equal(small, interval.Start);
Assert.Equal(smallIncluded, interval.IsStartIncluded);
Assert.Equal(big, interval.End);
Assert.Equal(bigIncluded, interval.IsEndIncluded);
}