def build_suite(app_module):
    suite = unittest.TestSuite()
    
    # Load unit and doctests in the models.py module. If module has
    # a suite() method, use it. Otherwise build the test suite ourselves.
    if hasattr(app_module, 'suite'):
        suite.addTest(app_module.suite())
    else:
        suite.addTest(unittest.defaultTestLoader.loadTestsFromModule(app_module))
        try:
            suite.addTest(doctest.DocTestSuite(app_module,
                                               checker=doctestOutputChecker,
                                               runner=DocTestRunner))
        except ValueError:
            # No doc tests in models.py
            pass
    
    # Check to see if a separate 'tests' module exists parallel to the 
    # models module
    test_module = get_tests(app_module)
    if test_module:
        # Load unit and doctests in the tests.py module. If module has
        # a suite() method, use it. Otherwise build the test suite ourselves.
        if hasattr(test_module, 'suite'):
            suite.addTest(test_module.suite())
        else:
            suite.addTest(unittest.defaultTestLoader.loadTestsFromModule(test_module))
            try:            
                suite.addTest(doctest.DocTestSuite(test_module, 
                                                   checker=doctestOutputChecker,
                                                   runner=DocTestRunner))
            except ValueError:
                # No doc tests in tests.py
                pass
    return suite
Create a complete Django test suite for the provided application module
dataset/ETHPy150Open dcramer/django-compositepks/django/test/simple.py/build_suite