Software testing has received renewed attention with the widespread adoption of Extreme Programming and other agile methodologies. While testing does not directly improve the quality of software, the under-appreciated practice provides a timely and accurate measurement (a reality check) so that the reader knows whether any new action needs to be taken. Automated software testing is used to ensure that once the software works, it is not accidentally broken during subsequent software development or maintenance activities. This book describes patterns for writing automated tests using the XUnit family (e.g., JUnit and NUnit) of test automation frameworks. The author uses the proven practice of patterns to illuminate proven techniques. When properly applied, these patterns result in tests that are easier to write, easier to understand, more robust and repeatable, easier to maintain, and ultimately more cost-effective.

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Gerard Meszaros is Chief Scientist and Senior Consultant at ClearStream Consulting, a Calgary-based consultancy specializing in agile development. He has more than a decade of experience with automated unit testing frameworks and is a leading expert in test automation patterns, refactoring of software and tests, and design for testability.

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