Unit Testing Events with Anonymous Delegates in .NET 2.0

22nd February 2006

How do you unit test your event code?

How do you unit test your event code? You use Anonymous Delegates

Here’s a sample unit test that I’ve created that makes use of this technique:

        [TestMethod()]
        public void UpdateTestTimesTest()
        {
            object expected = UniSA.UniSAnet.SmartMark.DataAccess.DataItemChangedEventArgs.ChangeType.Update;
            object actual = null;
            UniSA.UniSAnet.SmartMark.DataAccess.TestComponent.DataItemChanged += delegate(object sender, UniSA.UniSAnet.SmartMark.DataAccess.DataItemChangedEventArgs e)
            {
                actual = e.Change;
            };

            Test test = UniSA.UniSAnet.SmartMark.DataAccess.TestComponent.GetTest(UnitTestingTestId);
            test.MinutesAllowed += 1;
            UniSA.UniSAnet.SmartMark.DataAccess.TestComponent.UpdateTestTimes(test);
            Assert.AreEqual(expected, actual);
        }