Generating JUnit Tests for Legacy Java Applications

Mon, 24 Dec 2007 23:00:00 EST

Unit tests give us the confidence to change applications, even legacy applications that we didn't write ourselves. To avoid the drudgery of writing a test case for every edge and boundary, we can let JUnit Factory generate a large set of characterization tests for us. If we need to explore an existing code base, characterization tests can act as a learning guide by documenting what the code actually does. If we need to change existing code, characterization tests act as critical 'change detectors' that help us avoid unforeseen side effects.

Java Product Review: What to Do If Your Code Has No Tests

Sat, 30 Sep 2006 16:00:00 EDT

When MailReader - an example application bundled with the Struts Action framework - was created six years ago, most Java developers had yet to discover unit testing. Consequently neither the Struts framework nor the MailReader were created test-first. Since then, we've bolted a few unit tests onto the Action framework, but the MailReader for Struts 1.2 still has no developer tests at all.

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Generating JUnit Tests for Legacy Java Applications

Java Product Review: What to Do If Your Code Has No Tests