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Extreme Programming in the Real World

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Eric M. Burke & Brian M. Coyner. Java Extreme. Programming. Cookbook ..... Most Java IDEs are integrated with JUnit. Read your IDE documentation to learn ...

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Extreme Programming in the Real WorldPage 1Extreme Programming in the Real WorldEric M. Burke & Brian M. CoynerJava ExtremeProgrammingCookbookTMPage 2JavaExtremeProgramming CookbookEric M. Burke and Brian M. CoynerBeijingCambridgeFarnhamKlnParisSebas topolTaipeiTokyoPage 3This is the Title of the Book eMatter EditionCopyright 2003 OReilly & Associates Inc. All rights reserved.59Chapter 4CHAPTER 4JUnit4.0 IntroductionUnit testing is at the heart of XP and it is a central theme of this book. JUnit*available from http://www.junit.org is the de facto standard for Java unit testing. It is asimple framework for creating automated unit tests. JUnit test cases are Java classesthat contain one or more unit test methods and these tests are grouped into testsuites. You can run tests individually or you can run entire test suites.Ant includes thejunittask for running JUnit tests. We showhowtorun JUnit tests using Ant in Chapter 3.Each JUnit test method should execute quickly. Speed is important because as moretests are written and integrated into the build process it takes longer to run theentire test suite. Programmers do not want to be interrupted for long periods of timeswhile tests runso the longer the tests take to execute the greater the likelihood programmers will skip this critical phase.You can also increase the likelihood that programmers will run the tests by making itextremely easy preferably with a single command. The ability to run all tests with asingle command or button click is nearly a requirement to claim that your project isdoing XP. We showed how to run tests with Ant in the previous chapter and manyIDEs now make it possible to run tests by clicking on a menu item.JUnit tests are pass/fail tests explicitly designed to run without human intervention.Because of this design you can (and should) add your test suite to your continuousintegration build process so the tests run automatically.* We cover JUnit Version 3.8.1 in this chapter.Page 4This is the ...

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