As shown in a the post Nifty JUnit : Working with temporary files, it is possible to use @Rule in a JUnit test, which is a Method level Rule. In this example I would like to show the variation of the @ClassRule for a Class level Rule.

The @Rule is fired before each test method (just like @Before) and after each test method (just like @After) of the test class, as shown in the example below.

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I get this question quite often and I struggled with it many times before: How do I work with temporary files in my JUnit testcases? I would like to explain two simple ways of working with temporary files in JUnit.

Create a temporary file with the Java File API and mark it directly as deleteOnExit(). The created file will be deleted when the JVM exits.

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