I would be interested in thoughts concerning UnitTest''''''ing for Java Events. This problem came up when I was writing a JavaBean which generated PropertyChangeEvents. I would like to write tests for those but am not sure of the best approach using JavaUnit. -- ChanningWalton

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I create event listeners that receive events and append them to a Vector, along with information about which method was called, etc.

To test a class that generates events I create a Vector, create event listeners with a reference to the Vector, register the listeners with the event source to be tested and then exercise the event source's methods.  I then check that the Vector contains the expected sequence of events.  I usually write convenience methods for this which compare a static array of objects to an enumeration of the vector's elements.

-- NatPryce

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There is some related discussion on JournallingPattern.

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CategoryTesting CategoryJava CategoryEvents