5.3.3 Re-using old test code

Python PEP

5.3.3 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.

See About this document... for information on suggesting changes.