"""Basic test of the frozen module (source is in Python/frozen.c)."""# The Python/frozen.c source code contains a marshalled Python module# and therefore depends on the marshal format as well as the bytecode# format. If those formats have been changed then frozen.c needs to be# updated.## The test_importlib also tests this module but because those tests# are much more complicated, it might be unclear why they are failing.# Invalid marshalled data in frozen.c could case the interpreter to# crash when __hello__ is imported.importsysimportunittestfromtest.supportimportcaptured_stdoutclassTestFrozen(unittest.TestCase):deftest_frozen(self):name='__hello__'ifnameinsys.modules:delsys.modules[name]withcaptured_stdout()asout:import__hello__self.assertEqual(out.getvalue(),'Hello world!\n')if__name__=='__main__':unittest.main()