xUnit Test Patterns

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.