Implement PEP 451 (ModuleSpec).

Lib/test/test_importlib/extension/test_loader.py

@@ -6,9 +6,75 @@ machinery = util.import_importlib('importlib.machinery')
 
 import os.path
 import sys
+import types
 import unittest
 
 
+class ExecModuleTests(abc.LoaderTests):
+
+    """Test load_module() for extension modules."""
+
+    def setUp(self):
+        self.loader = self.machinery.ExtensionFileLoader(ext_util.NAME,
+                                                         ext_util.FILEPATH)
+
+    def exec_module(self, fullname):
+        module = types.ModuleType(fullname)
+        module.__spec__ = self.machinery.ModuleSpec(fullname, self.loader)
+        self.loader.exec_module(module)
+        return sys.modules[fullname]
+
+    def test_exec_module_API(self):
+        with self.assertRaises(ImportError):
+            self.exec_module('XXX')
+
+
+    def test_module(self):
+        with util.uncache(ext_util.NAME):
+            module = self.exec_module(ext_util.NAME)
+            for attr, value in [('__name__', ext_util.NAME),
+                                ('__file__', ext_util.FILEPATH),
+                                ('__package__', '')]:
+                given = getattr(module, attr)
+                self.assertEqual(given, value,
+                                 '{}: {!r} != {!r}'.format(attr, given, value))
+            self.assertIn(ext_util.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(ext_util.NAME):
+            module1 = self.exec_module(ext_util.NAME)
+            module2 = self.exec_module(ext_util.NAME)
+            self.assertIs(module1, module2)
+
+    def test_state_after_failure(self):
+        # No easy way to trigger a failure after a successful import.
+        pass
+
+    def test_unloadable(self):
+        name = 'asdfjkl;'
+        with self.assertRaises(ImportError) as cm:
+            self.exec_module(name)
+        self.assertEqual(cm.exception.name, name)
+
+    def test_is_package(self):
+        self.assertFalse(self.loader.is_package(ext_util.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_ExecModuleTests, Source_ExecModuleTests = util.test_both(
+        ExecModuleTests, machinery=machinery)
+
+
 class LoaderTests(abc.LoaderTests):
 
     """Test load_module() for extension modules."""
@@ -39,13 +105,11 @@ class LoaderTests(abc.LoaderTests):
             self.assertIsInstance(module.__loader__,
                                   self.machinery.ExtensionFileLoader)
 
-    def test_package(self):
-        # No extension module as __init__ available for testing.
-        pass
+    # No extension module as __init__ available for testing.
+    test_package = None
 
-    def test_lacking_parent(self):
-        # No extension module in a package available for testing.
-        pass
+    # No extension module in a package available for testing.
+    test_lacking_parent = None
 
     def test_module_reuse(self):
         with util.uncache(ext_util.NAME):
@@ -53,9 +117,8 @@ class LoaderTests(abc.LoaderTests):
             module2 = self.load_module(ext_util.NAME)
             self.assertIs(module1, module2)
 
-    def test_state_after_failure(self):
-        # No easy way to trigger a failure after a successful import.
-        pass
+    # No easy way to trigger a failure after a successful import.
+    test_state_after_failure = None
 
     def test_unloadable(self):
         name = 'asdfjkl;'