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2de5097ba4
Raise an ImportWarning when the import system falls back on load_module(). As for implementations of load_module(), raise a DeprecationWarning.
111 lines
3.8 KiB
Python
111 lines
3.8 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 sys
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import types
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import unittest
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import warnings
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@unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module')
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class LoaderTests(abc.LoaderTests):
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"""Test load_module() for built-in modules."""
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def setUp(self):
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self.verification = {'__name__': 'errno', '__package__': '',
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'__loader__': self.machinery.BuiltinImporter}
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def verify(self, module):
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"""Verify that the module matches against what it should have."""
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self.assertIsInstance(module, types.ModuleType)
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for attr, value in self.verification.items():
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self.assertEqual(getattr(module, attr), value)
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self.assertIn(module.__name__, sys.modules)
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def load_module(self, name):
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with warnings.catch_warnings():
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warnings.simplefilter("ignore", DeprecationWarning)
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return self.machinery.BuiltinImporter.load_module(name)
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def test_module(self):
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# Common case.
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with util.uncache(util.BUILTINS.good_name):
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module = self.load_module(util.BUILTINS.good_name)
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self.verify(module)
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# Built-in modules cannot be a package.
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test_package = test_lacking_parent = None
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# No way to force an import failure.
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test_state_after_failure = None
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def test_module_reuse(self):
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# Test that the same module is used in a reload.
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with util.uncache(util.BUILTINS.good_name):
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module1 = self.load_module(util.BUILTINS.good_name)
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module2 = self.load_module(util.BUILTINS.good_name)
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self.assertIs(module1, module2)
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def test_unloadable(self):
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name = 'dssdsdfff'
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assert name not in sys.builtin_module_names
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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_already_imported(self):
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# Using the name of a module already imported but not a built-in should
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# still fail.
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module_name = 'builtin_reload_test'
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assert module_name not in sys.builtin_module_names
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with util.uncache(module_name):
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module = types.ModuleType(module_name)
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sys.modules[module_name] = module
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with self.assertRaises(ImportError) as cm:
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self.load_module(module_name)
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self.assertEqual(cm.exception.name, module_name)
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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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@unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module')
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class InspectLoaderTests:
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"""Tests for InspectLoader methods for BuiltinImporter."""
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def test_get_code(self):
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# There is no code object.
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result = self.machinery.BuiltinImporter.get_code(util.BUILTINS.good_name)
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self.assertIsNone(result)
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def test_get_source(self):
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# There is no source.
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result = self.machinery.BuiltinImporter.get_source(util.BUILTINS.good_name)
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self.assertIsNone(result)
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def test_is_package(self):
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# Cannot be a package.
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result = self.machinery.BuiltinImporter.is_package(util.BUILTINS.good_name)
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self.assertFalse(result)
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@unittest.skipIf(util.BUILTINS.bad_name is None, 'all modules are built in')
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def test_not_builtin(self):
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# Modules not built-in should raise ImportError.
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for meth_name in ('get_code', 'get_source', 'is_package'):
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method = getattr(self.machinery.BuiltinImporter, meth_name)
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with self.assertRaises(ImportError) as cm:
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method(util.BUILTINS.bad_name)
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(Frozen_InspectLoaderTests,
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Source_InspectLoaderTests
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) = util.test_both(InspectLoaderTests, machinery=machinery)
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if __name__ == '__main__':
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unittest.main()
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