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300 lines
12 KiB
Python
300 lines
12 KiB
Python
from .. import abc
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from .. import util
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machinery = util.import_importlib('importlib.machinery')
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import os.path
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import sys
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import types
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import unittest
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import importlib.util
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import importlib
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from test.support.script_helper import assert_python_failure
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class LoaderTests(abc.LoaderTests):
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"""Test load_module() for extension modules."""
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def setUp(self):
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self.loader = self.machinery.ExtensionFileLoader(util.EXTENSIONS.name,
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util.EXTENSIONS.file_path)
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def load_module(self, fullname):
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return self.loader.load_module(fullname)
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def test_load_module_API(self):
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# Test the default argument for load_module().
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self.loader.load_module()
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self.loader.load_module(None)
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with self.assertRaises(ImportError):
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self.load_module('XXX')
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def test_equality(self):
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other = self.machinery.ExtensionFileLoader(util.EXTENSIONS.name,
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util.EXTENSIONS.file_path)
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self.assertEqual(self.loader, other)
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def test_inequality(self):
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other = self.machinery.ExtensionFileLoader('_' + util.EXTENSIONS.name,
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util.EXTENSIONS.file_path)
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self.assertNotEqual(self.loader, other)
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def test_module(self):
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with util.uncache(util.EXTENSIONS.name):
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module = self.load_module(util.EXTENSIONS.name)
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for attr, value in [('__name__', util.EXTENSIONS.name),
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('__file__', util.EXTENSIONS.file_path),
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('__package__', '')]:
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self.assertEqual(getattr(module, attr), value)
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self.assertIn(util.EXTENSIONS.name, sys.modules)
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self.assertIsInstance(module.__loader__,
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self.machinery.ExtensionFileLoader)
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# No extension module as __init__ available for testing.
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test_package = None
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# No extension module in a package available for testing.
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test_lacking_parent = None
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def test_module_reuse(self):
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with util.uncache(util.EXTENSIONS.name):
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module1 = self.load_module(util.EXTENSIONS.name)
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module2 = self.load_module(util.EXTENSIONS.name)
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self.assertIs(module1, module2)
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# No easy way to trigger a failure after a successful import.
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test_state_after_failure = None
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def test_unloadable(self):
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name = 'asdfjkl;'
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with self.assertRaises(ImportError) as cm:
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self.load_module(name)
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self.assertEqual(cm.exception.name, name)
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def test_is_package(self):
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self.assertFalse(self.loader.is_package(util.EXTENSIONS.name))
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for suffix in self.machinery.EXTENSION_SUFFIXES:
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path = os.path.join('some', 'path', 'pkg', '__init__' + suffix)
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loader = self.machinery.ExtensionFileLoader('pkg', path)
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self.assertTrue(loader.is_package('pkg'))
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(Frozen_LoaderTests,
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Source_LoaderTests
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) = util.test_both(LoaderTests, machinery=machinery)
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class MultiPhaseExtensionModuleTests(abc.LoaderTests):
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"""Test loading extension modules with multi-phase initialization (PEP 489)
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"""
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def setUp(self):
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self.name = '_testmultiphase'
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finder = self.machinery.FileFinder(None)
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self.spec = importlib.util.find_spec(self.name)
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assert self.spec
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self.loader = self.machinery.ExtensionFileLoader(
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self.name, self.spec.origin)
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# No extension module as __init__ available for testing.
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test_package = None
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# No extension module in a package available for testing.
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test_lacking_parent = None
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# Handling failure on reload is the up to the module.
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test_state_after_failure = None
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def test_module(self):
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'''Test loading an extension module'''
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with util.uncache(self.name):
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module = self.load_module()
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for attr, value in [('__name__', self.name),
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('__file__', self.spec.origin),
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('__package__', '')]:
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self.assertEqual(getattr(module, attr), value)
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with self.assertRaises(AttributeError):
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module.__path__
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self.assertIs(module, sys.modules[self.name])
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self.assertIsInstance(module.__loader__,
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self.machinery.ExtensionFileLoader)
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def test_functionality(self):
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'''Test basic functionality of stuff defined in an extension module'''
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with util.uncache(self.name):
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module = self.load_module()
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self.assertIsInstance(module, types.ModuleType)
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ex = module.Example()
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self.assertEqual(ex.demo('abcd'), 'abcd')
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self.assertEqual(ex.demo(), None)
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with self.assertRaises(AttributeError):
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ex.abc
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ex.abc = 0
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self.assertEqual(ex.abc, 0)
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self.assertEqual(module.foo(9, 9), 18)
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self.assertIsInstance(module.Str(), str)
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self.assertEqual(module.Str(1) + '23', '123')
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with self.assertRaises(module.error):
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raise module.error()
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self.assertEqual(module.int_const, 1969)
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self.assertEqual(module.str_const, 'something different')
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def test_reload(self):
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'''Test that reload didn't re-set the module's attributes'''
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with util.uncache(self.name):
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module = self.load_module()
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ex_class = module.Example
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importlib.reload(module)
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self.assertIs(ex_class, module.Example)
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def test_try_registration(self):
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'''Assert that the PyState_{Find,Add,Remove}Module C API doesn't work'''
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module = self.load_module()
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with self.subTest('PyState_FindModule'):
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self.assertEqual(module.call_state_registration_func(0), None)
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with self.subTest('PyState_AddModule'):
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with self.assertRaises(SystemError):
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module.call_state_registration_func(1)
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with self.subTest('PyState_RemoveModule'):
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with self.assertRaises(SystemError):
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module.call_state_registration_func(2)
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def load_module(self):
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'''Load the module from the test extension'''
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return self.loader.load_module(self.name)
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def load_module_by_name(self, fullname):
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'''Load a module from the test extension by name'''
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origin = self.spec.origin
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loader = self.machinery.ExtensionFileLoader(fullname, origin)
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spec = importlib.util.spec_from_loader(fullname, loader)
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module = importlib.util.module_from_spec(spec)
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loader.exec_module(module)
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return module
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def test_load_submodule(self):
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'''Test loading a simulated submodule'''
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module = self.load_module_by_name('pkg.' + self.name)
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self.assertIsInstance(module, types.ModuleType)
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self.assertEqual(module.__name__, 'pkg.' + self.name)
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self.assertEqual(module.str_const, 'something different')
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def test_load_short_name(self):
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'''Test loading module with a one-character name'''
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module = self.load_module_by_name('x')
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self.assertIsInstance(module, types.ModuleType)
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self.assertEqual(module.__name__, 'x')
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self.assertEqual(module.str_const, 'something different')
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self.assertNotIn('x', sys.modules)
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def test_load_twice(self):
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'''Test that 2 loads result in 2 module objects'''
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module1 = self.load_module_by_name(self.name)
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module2 = self.load_module_by_name(self.name)
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self.assertIsNot(module1, module2)
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def test_unloadable(self):
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'''Test nonexistent module'''
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name = 'asdfjkl;'
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with self.assertRaises(ImportError) as cm:
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self.load_module_by_name(name)
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self.assertEqual(cm.exception.name, name)
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def test_unloadable_nonascii(self):
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'''Test behavior with nonexistent module with non-ASCII name'''
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name = 'fo\xf3'
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with self.assertRaises(ImportError) as cm:
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self.load_module_by_name(name)
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self.assertEqual(cm.exception.name, name)
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def test_nonmodule(self):
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'''Test returning a non-module object from create works'''
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name = self.name + '_nonmodule'
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mod = self.load_module_by_name(name)
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self.assertNotEqual(type(mod), type(unittest))
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self.assertEqual(mod.three, 3)
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# issue 27782
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def test_nonmodule_with_methods(self):
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'''Test creating a non-module object with methods defined'''
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name = self.name + '_nonmodule_with_methods'
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mod = self.load_module_by_name(name)
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self.assertNotEqual(type(mod), type(unittest))
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self.assertEqual(mod.three, 3)
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self.assertEqual(mod.bar(10, 1), 9)
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def test_null_slots(self):
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'''Test that NULL slots aren't a problem'''
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name = self.name + '_null_slots'
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module = self.load_module_by_name(name)
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self.assertIsInstance(module, types.ModuleType)
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self.assertEqual(module.__name__, name)
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def test_bad_modules(self):
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'''Test SystemError is raised for misbehaving extensions'''
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for name_base in [
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'bad_slot_large',
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'bad_slot_negative',
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'create_int_with_state',
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'negative_size',
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'export_null',
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'export_uninitialized',
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'export_raise',
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'export_unreported_exception',
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'create_null',
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'create_raise',
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'create_unreported_exception',
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'nonmodule_with_exec_slots',
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'exec_err',
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'exec_raise',
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'exec_unreported_exception',
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]:
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with self.subTest(name_base):
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name = self.name + '_' + name_base
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with self.assertRaises(SystemError):
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self.load_module_by_name(name)
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def test_nonascii(self):
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'''Test that modules with non-ASCII names can be loaded'''
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# punycode behaves slightly differently in some-ASCII and no-ASCII
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# cases, so test both
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cases = [
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(self.name + '_zkou\u0161ka_na\u010dten\xed', 'Czech'),
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('\uff3f\u30a4\u30f3\u30dd\u30fc\u30c8\u30c6\u30b9\u30c8',
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'Japanese'),
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]
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for name, lang in cases:
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with self.subTest(name):
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module = self.load_module_by_name(name)
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self.assertEqual(module.__name__, name)
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self.assertEqual(module.__doc__, "Module named in %s" % lang)
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@unittest.skipIf(not hasattr(sys, 'gettotalrefcount'),
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'--with-pydebug has to be enabled for this test')
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def test_bad_traverse(self):
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''' Issue #32374: Test that traverse fails when accessing per-module
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state before Py_mod_exec was executed.
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(Multiphase initialization modules only)
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'''
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script = """if True:
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try:
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from test import support
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import importlib.util as util
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spec = util.find_spec('_testmultiphase')
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spec.name = '_testmultiphase_with_bad_traverse'
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with support.SuppressCrashReport():
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m = spec.loader.create_module(spec)
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except:
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# Prevent Python-level exceptions from
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# ending the process with non-zero status
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# (We are testing for a crash in C-code)
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pass"""
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assert_python_failure("-c", script)
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(Frozen_MultiPhaseExtensionModuleTests,
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Source_MultiPhaseExtensionModuleTests
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) = util.test_both(MultiPhaseExtensionModuleTests, machinery=machinery)
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if __name__ == '__main__':
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unittest.main()
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