Python Library Reference

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5.2.2 Re-using old test code

Some users will find that they have existing test code that they would like to run from PyUnit, without converting every old test function to a TestCase subclass.

For this reason, PyUnit provides a FunctionTestCase class. This subclass of TestCase can be used to wrap an existing test function. Set-up and tear-down functions can also optionally be wrapped.

Given the following test function:

def testSomething():
    something = makeSomething()
    assert something.name is not None
    # ...

one can create an equivalent test case instance as follows:

testcase = unittest.FunctionTestCase(testSomething)

If there are additional set-up and tear-down methods that should be called as part of the test case's operation, they can also be provided:

testcase = unittest.FunctionTestCase(testSomething,
                                     setUp=makeSomethingDB,
                                     tearDown=deleteSomethingDB)

Note: PyUnit supports the use of AssertionError as an indicator of test failure, but does not recommend it. Future versions may treat AssertionError differently.

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Python Library Reference

Previous: 5.2.1 Organizing test code Up: 5.2 unittest Next: 5.2.3 Classes and functions

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Release 2.1.2, documentation updated on January 16, 2002.