[TestFixture] public class CalculatorClassTest { private CalculatorClass _target; [SetUp] public void Setup() { _target = new CalculatorClass(); } [Test] public void TestAdd() { Assert.AreEqual(6,_target.DoAdd(4,2)); } [Test] public void TestSubtract() { Assert.AreEqual(-2, _target.DoSubtract(2, 4)); } } public class CalculatorClass { public int DoAdd(int i, int i1) { throw new NotImplementedException(); } public int DoSubtract(int i, int i1) { throw new NotImplementedException(); } }