public void SubTest()
{
int expected = 8;
Calculate calculate = new Calculate();
Assert.AreEqual(expected, calculate.sub(10, 2));
Assert.AreNotEqual(expected, calculate.sub(10, 0));
}
public void AddTest()
{
int expected = 12;
Calculate calculate = new Calculate();
Assert.AreEqual(expected, calculate.add(9, 3));
Assert.AreNotEqual(expected, calculate.add(9, 2));
}