Firing Events Made Easy
I have already posted about Firing Events (There is a “Fire Event” party pic to the right). Here is how to use reflective mocks to Fire Events.
Here is the example again:
public void Example() { Button button = new Button(); button.Click += new EventHandler(button_Click); } private void button_Click(object sender, EventArgs e) { // Do Somethings here }
Now we want to test that the Example class works correctly when the button is clicked. Here is how we mimic the Button click, by mocking the Button.
Test] public void TestThatExampleWorksWhenButtonClicked() { Mock buttonMock = MockManager.Mock(typeof(Button)); // expect Example to add an event (and keep a hook to the event) MockedEvent clickButton =buttonMock.ExpectAddEvent("Click"); // invoke our test method that registers to button.Click Example(); // Fire the event clickButton.Fire(this, EventArgs.Empty); // here we test that Example works correctly //… MockManager.Verify(); }
Notice the clickButton.Fire used to fire the Click event.
Cool 
Tip: The Event must be subscribed before using Fire. Guess why?
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3 Responses to “Firing Events Made Easy”
1 Eli Lopian’s Blog (TypeMock) » Blog Archive » How To Isolate Future Instances 21 November 2006 @ 1:17 am
[…] Using this and the Firing Events techniques we can simulate different button sequences. […]
2 private override » Blog Archive » Mock Objects… Firing Events 5 December 2006 @ 8:15 pm
[…] It has been long enough since I’ve made my last post, but with the recent posting from Eli’s blog about TypeMock on Firing Events when mocking/testing, I thought I would throw out my solution to this problem for those of us using NMock2. […]
3 private override » Mock Objects… Firing Events 16 May 2008 @ 10:24 pm
[…] It has been long enough since I’ve made my last post, but with the recent posting from Eli’s blog about TypeMock on Firing Events when mocking/testing, I thought I would throw out my solution to this problem for those of us using NMock2. […]
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