28 Sep '12, 4pm

Four-Phase Test, the fundamental structure of all unit tests.

September 28, 2012 Tagged: four-phase test testing Comments (View) Four-Phase Test The Four-Phase Test is a testing pattern, applicable to all programming languages and unit tests (not so much integration tests). It takes the following general form: test do setup exercise verify teardown end There are four distinct phases of the test. They are executed sequentially. setup During setup, the system under test (usually a class, object, or method) is set up. @user = User.new(password: 'password') exercise During exercise, the system under test is executed. @user.save verify During verification, the result of the exercise is verified against the developer’s expectations. @user.encrypted_password.should_not be_nil teardown During teardown, the system under test is reset to its pre-setup state. This is usually handled implicitly by the language (releasing memory) or test framewor...

Full article: http://robots.thoughtbot.com/post/32455387133/four-phase-...

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