public void DivisionTaskTest(string val1, string val2) { using (StreamWriter w = File.AppendText("log.txt")) { Log("division Test " + "Values:" + val1 + ";" + val2, w); } // Arrange ValuesController controller = new ValuesController(); Values values = new Values() { Val1 = val1, Val2 = val2 }; // Act var result = controller.DivisionTask(values); // Assert Assert.NotNull(controller); Assert.NotNull(values); Assert.NotNull(result); Assert.IsType <Values>(values); Assert.IsType <ValuesController>(controller); }