'Contain common code for testing results of reading a .pth file'

def pth_file_tests(self, pth_file):

    self.assertIn(pth_file.imported, sys.modules, ('%s    not    in    sys.modules' % pth_file.imported))
    self.assertIn(site.makepath(pth_file.good_dir_path)[0], sys.path)
    self.assertFalse(os.path.exists(pth_file.bad_dir_path))
