1  from test.test_importlib import abc, util
       2  
       3  machinery = util.import_importlib('importlib.machinery')
       4  
       5  import sys
       6  import types
       7  import unittest
       8  import warnings
       9  
      10  @unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module')
      11  class ESC[4;38;5;81mLoaderTests(ESC[4;38;5;149mabcESC[4;38;5;149m.ESC[4;38;5;149mLoaderTests):
      12  
      13      """Test load_module() for built-in modules."""
      14  
      15      def setUp(self):
      16          self.verification = {'__name__': 'errno', '__package__': '',
      17                               '__loader__': self.machinery.BuiltinImporter}
      18  
      19      def verify(self, module):
      20          """Verify that the module matches against what it should have."""
      21          self.assertIsInstance(module, types.ModuleType)
      22          for attr, value in self.verification.items():
      23              self.assertEqual(getattr(module, attr), value)
      24          self.assertIn(module.__name__, sys.modules)
      25  
      26      def load_module(self, name):
      27          with warnings.catch_warnings():
      28              warnings.simplefilter("ignore", DeprecationWarning)
      29              return self.machinery.BuiltinImporter.load_module(name)
      30  
      31      def test_module(self):
      32          # Common case.
      33          with util.uncache(util.BUILTINS.good_name):
      34              module = self.load_module(util.BUILTINS.good_name)
      35              self.verify(module)
      36  
      37      # Built-in modules cannot be a package.
      38      test_package = test_lacking_parent = None
      39  
      40      # No way to force an import failure.
      41      test_state_after_failure = None
      42  
      43      def test_module_reuse(self):
      44          # Test that the same module is used in a reload.
      45          with util.uncache(util.BUILTINS.good_name):
      46              module1 = self.load_module(util.BUILTINS.good_name)
      47              module2 = self.load_module(util.BUILTINS.good_name)
      48              self.assertIs(module1, module2)
      49  
      50      def test_unloadable(self):
      51          name = 'dssdsdfff'
      52          assert name not in sys.builtin_module_names
      53          with self.assertRaises(ImportError) as cm:
      54              self.load_module(name)
      55          self.assertEqual(cm.exception.name, name)
      56  
      57      def test_already_imported(self):
      58          # Using the name of a module already imported but not a built-in should
      59          # still fail.
      60          module_name = 'builtin_reload_test'
      61          assert module_name not in sys.builtin_module_names
      62          with util.uncache(module_name):
      63              module = types.ModuleType(module_name)
      64              sys.modules[module_name] = module
      65          with self.assertRaises(ImportError) as cm:
      66              self.load_module(module_name)
      67          self.assertEqual(cm.exception.name, module_name)
      68  
      69  
      70  (Frozen_LoaderTests,
      71   Source_LoaderTests
      72   ) = util.test_both(LoaderTests, machinery=machinery)
      73  
      74  
      75  @unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module')
      76  class ESC[4;38;5;81mInspectLoaderTests:
      77  
      78      """Tests for InspectLoader methods for BuiltinImporter."""
      79  
      80      def test_get_code(self):
      81          # There is no code object.
      82          result = self.machinery.BuiltinImporter.get_code(util.BUILTINS.good_name)
      83          self.assertIsNone(result)
      84  
      85      def test_get_source(self):
      86          # There is no source.
      87          result = self.machinery.BuiltinImporter.get_source(util.BUILTINS.good_name)
      88          self.assertIsNone(result)
      89  
      90      def test_is_package(self):
      91          # Cannot be a package.
      92          result = self.machinery.BuiltinImporter.is_package(util.BUILTINS.good_name)
      93          self.assertFalse(result)
      94  
      95      @unittest.skipIf(util.BUILTINS.bad_name is None, 'all modules are built in')
      96      def test_not_builtin(self):
      97          # Modules not built-in should raise ImportError.
      98          for meth_name in ('get_code', 'get_source', 'is_package'):
      99              method = getattr(self.machinery.BuiltinImporter, meth_name)
     100          with self.assertRaises(ImportError) as cm:
     101              method(util.BUILTINS.bad_name)
     102  
     103  
     104  (Frozen_InspectLoaderTests,
     105   Source_InspectLoaderTests
     106   ) = util.test_both(InspectLoaderTests, machinery=machinery)
     107  
     108  
     109  if __name__ == '__main__':
     110      unittest.main()