public void Test_CubeWithOverflowCheck_ThrowsArithmeticOverflowException(int x)
 {
     Assert.Throws <OverflowException>(() => Integers.CubeWithOverflowCheck(x));
 }
 public void Test_CubeWithOverflowCheck_ReturnsCorrectValue(int x, int cube)
 {
     Assert.Equal(Integers.CubeWithOverflowCheck(x), cube);
 }