def METHOD_NAME(self):
    # http://bugs.python.org/issue22966
    # py_compile foo.bar.py -> __pycache__/foo.cpython-34.pyc
    weird_path = os.path.join(self.directory, 'foo.bar.py')
    cache_path = importlib.util.cache_from_source(weird_path)
    pyc_path = weird_path + 'c'
    head, tail = os.path.split(cache_path)
    penultimate_tail = os.path.basename(head)
    self.assertEqual(
        os.path.join(penultimate_tail, tail),
        os.path.join(
            '__pycache__',
            'foo.bar.{}.pyc'.format(sys.implementation.cache_tag)))
    with open(weird_path, 'w') as file:
        file.write('x = 123\n')
    py_compile.compile(weird_path)
    self.assertTrue(os.path.exists(cache_path))
    self.assertFalse(os.path.exists(pyc_path))