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"""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.
import importlib.machinery
import sys
import unittest
from test.support import captured_stdout, import_helper
class TestFrozen(unittest.TestCase):
def test_frozen(self):
name = '__hello__'
if name in sys.modules:
del sys.modules[name]
with import_helper.frozen_modules():
import __hello__
with captured_stdout() as out:
__hello__.main()
self.assertEqual(out.getvalue(), 'Hello world!\n')
def test_frozen_submodule_in_unfrozen_package(self):
with import_helper.CleanImport('__phello__', '__phello__.spam'):
with import_helper.frozen_modules(enabled=False):
import __phello__
with import_helper.frozen_modules(enabled=True):
import __phello__.spam as spam
self.assertIs(spam, __phello__.spam)
self.assertIsNot(__phello__.__spec__.loader,
importlib.machinery.FrozenImporter)
self.assertIs(spam.__spec__.loader,
importlib.machinery.FrozenImporter)
def test_unfrozen_submodule_in_frozen_package(self):
with import_helper.CleanImport('__phello__', '__phello__.spam'):
with import_helper.frozen_modules(enabled=True):
import __phello__
with import_helper.frozen_modules(enabled=False):
import __phello__.spam as spam
self.assertIs(spam, __phello__.spam)
self.assertIs(__phello__.__spec__.loader,
importlib.machinery.FrozenImporter)
self.assertIsNot(spam.__spec__.loader,
importlib.machinery.FrozenImporter)
if __name__ == '__main__':
unittest.main()
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