public void TestSquare_input_is_zero()
{
Square s = new Square();
int number = 0;
int result = Square.square(number);
int expected = 0;
Assert.AreEqual(expected, result);
}
public void TestSquare_input_is_minus_5()
{
Square s = new Square();
int number = -5;
int result = Square.square(number);
int expected = 25;
Assert.AreEqual(expected, result);
}