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from warnings import catch_warnings
from test.test_importlib import abc, util
machinery = util.import_importlib('importlib.machinery')
import os.path
import sys
import types
import unittest
import warnings
import importlib.util
import importlib
from test.support import MISSING_C_DOCSTRINGS
from test.support.script_helper import assert_python_failure
class LoaderTests(abc.LoaderTests):
"""Test load_module() for extension modules."""
def setUp(self):
if not self.machinery.EXTENSION_SUFFIXES or not util.EXTENSIONS:
raise unittest.SkipTest("Requires dynamic loading support.")
if util.EXTENSIONS.name in sys.builtin_module_names:
raise unittest.SkipTest(
f"{util.EXTENSIONS.name} is a builtin module"
)
self.loader = self.machinery.ExtensionFileLoader(util.EXTENSIONS.name,
util.EXTENSIONS.file_path)
def load_module(self, fullname):
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
return self.loader.load_module(fullname)
def test_load_module_API(self):
# Test the default argument for load_module().
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
self.loader.load_module()
self.loader.load_module(None)
with self.assertRaises(ImportError):
self.load_module('XXX')
def test_equality(self):
other = self.machinery.ExtensionFileLoader(util.EXTENSIONS.name,
util.EXTENSIONS.file_path)
self.assertEqual(self.loader, other)
def test_inequality(self):
other = self.machinery.ExtensionFileLoader('_' + util.EXTENSIONS.name,
util.EXTENSIONS.file_path)
self.assertNotEqual(self.loader, other)
def test_module(self):
with util.uncache(util.EXTENSIONS.name):
module = self.load_module(util.EXTENSIONS.name)
for attr, value in [('__name__', util.EXTENSIONS.name),
('__file__', util.EXTENSIONS.file_path),
('__package__', '')]:
self.assertEqual(getattr(module, attr), value)
self.assertIn(util.EXTENSIONS.name, sys.modules)
self.assertIsInstance(module.__loader__,
self.machinery.ExtensionFileLoader)
# No extension module as __init__ available for testing.
test_package = None
# No extension module in a package available for testing.
test_lacking_parent = None
def test_module_reuse(self):
with util.uncache(util.EXTENSIONS.name):
module1 = self.load_module(util.EXTENSIONS.name)
module2 = self.load_module(util.EXTENSIONS.name)
self.assertIs(module1, module2)
# No easy way to trigger a failure after a successful import.
test_state_after_failure = None
def test_unloadable(self):
name = 'asdfjkl;'
with self.assertRaises(ImportError) as cm:
self.load_module(name)
self.assertEqual(cm.exception.name, name)
def test_is_package(self):
self.assertFalse(self.loader.is_package(util.EXTENSIONS.name))
for suffix in self.machinery.EXTENSION_SUFFIXES:
path = os.path.join('some', 'path', 'pkg', '__init__' + suffix)
loader = self.machinery.ExtensionFileLoader('pkg', path)
self.assertTrue(loader.is_package('pkg'))
(Frozen_LoaderTests,
Source_LoaderTests
) = util.test_both(LoaderTests, machinery=machinery)
class MultiPhaseExtensionModuleTests(abc.LoaderTests):
# Test loading extension modules with multi-phase initialization (PEP 489).
def setUp(self):
if not self.machinery.EXTENSION_SUFFIXES or not util.EXTENSIONS:
raise unittest.SkipTest("Requires dynamic loading support.")
self.name = '_testmultiphase'
if self.name in sys.builtin_module_names:
raise unittest.SkipTest(
f"{self.name} is a builtin module"
)
finder = self.machinery.FileFinder(None)
self.spec = importlib.util.find_spec(self.name)
assert self.spec
self.loader = self.machinery.ExtensionFileLoader(
self.name, self.spec.origin)
def load_module(self):
# Load the module from the test extension.
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
return self.loader.load_module(self.name)
def load_module_by_name(self, fullname):
# Load a module from the test extension by name.
origin = self.spec.origin
loader = self.machinery.ExtensionFileLoader(fullname, origin)
spec = importlib.util.spec_from_loader(fullname, loader)
module = importlib.util.module_from_spec(spec)
loader.exec_module(module)
return module
# No extension module as __init__ available for testing.
test_package = None
# No extension module in a package available for testing.
test_lacking_parent = None
# Handling failure on reload is the up to the module.
test_state_after_failure = None
def test_module(self):
# Test loading an extension module.
with util.uncache(self.name):
module = self.load_module()
for attr, value in [('__name__', self.name),
('__file__', self.spec.origin),
('__package__', '')]:
self.assertEqual(getattr(module, attr), value)
with self.assertRaises(AttributeError):
module.__path__
self.assertIs(module, sys.modules[self.name])
self.assertIsInstance(module.__loader__,
self.machinery.ExtensionFileLoader)
def test_functionality(self):
# Test basic functionality of stuff defined in an extension module.
with util.uncache(self.name):
module = self.load_module()
self.assertIsInstance(module, types.ModuleType)
ex = module.Example()
self.assertEqual(ex.demo('abcd'), 'abcd')
self.assertEqual(ex.demo(), None)
with self.assertRaises(AttributeError):
ex.abc
ex.abc = 0
self.assertEqual(ex.abc, 0)
self.assertEqual(module.foo(9, 9), 18)
self.assertIsInstance(module.Str(), str)
self.assertEqual(module.Str(1) + '23', '123')
with self.assertRaises(module.error):
raise module.error()
self.assertEqual(module.int_const, 1969)
self.assertEqual(module.str_const, 'something different')
def test_reload(self):
# Test that reload didn't re-set the module's attributes.
with util.uncache(self.name):
module = self.load_module()
ex_class = module.Example
importlib.reload(module)
self.assertIs(ex_class, module.Example)
def test_try_registration(self):
# Assert that the PyState_{Find,Add,Remove}Module C API doesn't work.
with util.uncache(self.name):
module = self.load_module()
with self.subTest('PyState_FindModule'):
self.assertEqual(module.call_state_registration_func(0), None)
with self.subTest('PyState_AddModule'):
with self.assertRaises(SystemError):
module.call_state_registration_func(1)
with self.subTest('PyState_RemoveModule'):
with self.assertRaises(SystemError):
module.call_state_registration_func(2)
def test_load_submodule(self):
# Test loading a simulated submodule.
module = self.load_module_by_name('pkg.' + self.name)
self.assertIsInstance(module, types.ModuleType)
self.assertEqual(module.__name__, 'pkg.' + self.name)
self.assertEqual(module.str_const, 'something different')
def test_load_short_name(self):
# Test loading module with a one-character name.
module = self.load_module_by_name('x')
self.assertIsInstance(module, types.ModuleType)
self.assertEqual(module.__name__, 'x')
self.assertEqual(module.str_const, 'something different')
self.assertNotIn('x', sys.modules)
def test_load_twice(self):
# Test that 2 loads result in 2 module objects.
module1 = self.load_module_by_name(self.name)
module2 = self.load_module_by_name(self.name)
self.assertIsNot(module1, module2)
def test_unloadable(self):
# Test nonexistent module.
name = 'asdfjkl;'
with self.assertRaises(ImportError) as cm:
self.load_module_by_name(name)
self.assertEqual(cm.exception.name, name)
def test_unloadable_nonascii(self):
# Test behavior with nonexistent module with non-ASCII name.
name = 'fo\xf3'
with self.assertRaises(ImportError) as cm:
self.load_module_by_name(name)
self.assertEqual(cm.exception.name, name)
def test_nonmodule(self):
# Test returning a non-module object from create works.
name = self.name + '_nonmodule'
mod = self.load_module_by_name(name)
self.assertNotEqual(type(mod), type(unittest))
self.assertEqual(mod.three, 3)
# issue 27782
def test_nonmodule_with_methods(self):
# Test creating a non-module object with methods defined.
name = self.name + '_nonmodule_with_methods'
mod = self.load_module_by_name(name)
self.assertNotEqual(type(mod), type(unittest))
self.assertEqual(mod.three, 3)
self.assertEqual(mod.bar(10, 1), 9)
def test_null_slots(self):
# Test that NULL slots aren't a problem.
name = self.name + '_null_slots'
module = self.load_module_by_name(name)
self.assertIsInstance(module, types.ModuleType)
self.assertEqual(module.__name__, name)
def test_bad_modules(self):
# Test SystemError is raised for misbehaving extensions.
for name_base in [
'bad_slot_large',
'bad_slot_negative',
'create_int_with_state',
'negative_size',
'export_null',
'export_uninitialized',
'export_raise',
'export_unreported_exception',
'create_null',
'create_raise',
'create_unreported_exception',
'nonmodule_with_exec_slots',
'exec_err',
'exec_raise',
'exec_unreported_exception',
]:
with self.subTest(name_base):
name = self.name + '_' + name_base
with self.assertRaises(SystemError):
self.load_module_by_name(name)
def test_nonascii(self):
# Test that modules with non-ASCII names can be loaded.
# punycode behaves slightly differently in some-ASCII and no-ASCII
# cases, so test both.
cases = [
(self.name + '_zkou\u0161ka_na\u010dten\xed', 'Czech'),
('\uff3f\u30a4\u30f3\u30dd\u30fc\u30c8\u30c6\u30b9\u30c8',
'Japanese'),
]
for name, lang in cases:
with self.subTest(name):
module = self.load_module_by_name(name)
self.assertEqual(module.__name__, name)
if not MISSING_C_DOCSTRINGS:
self.assertEqual(module.__doc__, "Module named in %s" % lang)
(Frozen_MultiPhaseExtensionModuleTests,
Source_MultiPhaseExtensionModuleTests
) = util.test_both(MultiPhaseExtensionModuleTests, machinery=machinery)
if __name__ == '__main__':
unittest.main()
|
