public void FindNextBiggerNumber_WithNegative_ThrowArgumentOutOfRangeException() => Assert.Throws <ArgumentOutOfRangeException>(() => IntegerFinder.FindNextBiggerNumber(-321, out _));
public int FindNextBiggerNumber_TestWithDiffNumbs(int a, out long l) => IntegerFinder.FindNextBiggerNumber(a, out l);