public void AddTest() { // Prepare test case double[] aArray = new double[] { 0.0, 1.0, 2.0, -1.0, 10000000000.0 }; double[] bArray = new double[] { 0.0, 2.0, -20.0, -2.0, -10000000000.0 }; double[] addedExpectedArray = new double[] { 0.0, 3.0, -18.0, -3.0, 0.0 }; // Run test for (int i = 0; i < 5; i++) { double a = aArray[i]; double b = bArray[i]; double addedExpected = addedExpectedArray[i]; double added = SumClass.Add(a, b); // Make sure that the results are expected values Assert.AreEqual(addedExpected, added); } }