public void TestSub() { int result = Calculator.Sub(3, 2); Assert.AreEqual(1, result); result = Calculator.Sub(0, 2); Assert.AreEqual(-2, result); result = Calculator.Sub(12, -2); Assert.AreEqual(14, result); result = Calculator.Sub(-3, -2); Assert.AreEqual(-1, result); result = Calculator.Sub(0, 0); Assert.AreEqual(0, result); }