Object Oriented Design

Download JUnit in Action by Vincent Massol, Ted Husted PDF

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By Vincent Massol, Ted Husted

A advisor to unit checking out Java functions (including J2EE purposes) utilizing the JUnit framework and its extensions, this ebook presents innovations for fixing real-world difficulties equivalent to unit checking out legacy functions, writing genuine checks for actual gadgets, automating checks, trying out in isolation, and unit checking out J2EE and database functions. utilizing a sample-driven technique, numerous unit checking out innovations are lined, corresponding to easy methods to unit try out EJBs, database purposes, and the way to unit attempt JSPs, and Taglibs. additionally addressed are trying out suggestions utilizing freely on hand open resource frameworks and instruments, and the way to unit try in isolation with Mock gadgets. checking out J2EE purposes through operating assessments from contained in the box for appearing integration unit assessments is mentioned, as is the right way to automate unit trying out in automatic builds (such as Ant and Maven) for acting non-stop integration.

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1 TestSuite A TestSuite runs a collection of test cases, which may include other test suites. It is a composite of Tests. 3 BaseTestRunner A test runner is a user interface for launching tests. BaseTestRunner is the superclass for all test runners. 2 shows the relationships among the seven core JUnit classes. You’ll see how these core classes and interfaces work together in this chapter and throughout the book. 2 Launching tests with test runners Writing tests can be fun, but what about the grunt work of running them?

Tests become more difficult to read and harder to maintain. A good test must be easy to read and simple to maintain. 1 as an example. TestRunner TestCalculator, the JUnit framework performs the following actions: ■ Creates a TestSuite ■ Creates a TestResult ■ Executes the test methods (testAdd in this case) We’ll present these steps using standard Universal Modeling Language ( UML) sequence diagrams. More about UML and design patterns As the sage said, a picture tells a thousand words; a symbol tells ten thousand more.

If all your tests always succeeded, what would be the point of running them? So, TestResult stores the details of all your tests, pass or fail. 1) includes a line that says assertEquals(60, result, 0); If the result did not equal 60, JUnit would create a TestFailure object to be stored in the TestResult. The TestRunner uses the TestResult to report the outcome of your tests. If there are no TestFailures in the TestResult collection, then the code is clean, and the bar turns green. , Design Patterns (Reading, MA: Addison-Wesley, 1995).

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