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