Unit Testing in BlueJ

The term unit testing refers to the individual testing of separate units of a software system. In object-oriented systems, these units typically are classes and methods. Thus, in our context, unit testing refers to the individual testing of methods and classes in BlueJ.

The unit testing features in BlueJ give you the tools to record and replay tests, so that unit tests can easily be repeated later (typically after a change in the system), so that the developer can gain some confidence that recent changes have not broken existing functionality. This is also known as regression testing.

The concepts of unit testing and regression testing are old, but their popularity was greatly increased recently with the publication of the eXtreme programming methodology and a unit testing tool for Java, JUnit.

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