Move import semantic util code to importlib.test.import_.util.

10 files changed, 99 insertions, 92 deletions

diff --git a/Lib/importlib/NOTES b/Lib/importlib/NOTES
index fd3e0e3..8351f1e 100644
--- a/Lib/importlib/NOTES
+++ b/Lib/importlib/NOTES
@@ -3,10 +3,6 @@ to do
 
 * Reorganize support code.
 
-    + Separate out support code for extensions out of test_support_hook.
-    + Move util.import_ and utill.mock_modules to import_, importlib_only,
-      mock_path_hook?
-
     + Add a file loader mock that returns monotonically increasing mtime.
         - Use in source/test_reload.
         - Use in source/test_load_module_mixed.
diff --git a/Lib/importlib/test/import_/test___package__.py b/Lib/importlib/test/import_/test___package__.py
index d29ca44..e91dfc1 100644
--- a/Lib/importlib/test/import_/test___package__.py
+++ b/Lib/importlib/test/import_/test___package__.py
@@ -6,6 +6,7 @@ of using the typical __path__/__name__ test).
 """
 import unittest
 from .. import util
+from . import util as import_util
 
 
 class Using__package__(unittest.TestCase):
@@ -36,8 +37,8 @@ class Using__package__(unittest.TestCase):
         # [__package__]
         with util.mock_modules('pkg.__init__', 'pkg.fake') as importer:
             with util.import_state(meta_path=[importer]):
-                util.import_('pkg.fake')
-                module = util.import_('', globals={'__package__': 'pkg.fake'},
+                import_util.import_('pkg.fake')
+                module = import_util.import_('', globals={'__package__': 'pkg.fake'},
                                  fromlist=['attr'], level=2)
         self.assertEquals(module.__name__, 'pkg')
 
@@ -45,8 +46,8 @@ class Using__package__(unittest.TestCase):
         # [__name__]
         with util.mock_modules('pkg.__init__', 'pkg.fake') as importer:
             with util.import_state(meta_path=[importer]):
-                util.import_('pkg.fake')
-                module = util.import_('',
+                import_util.import_('pkg.fake')
+                module = import_util.import_('',
                                  globals={'__name__': 'pkg.fake',
                                           '__path__': []},
                                  fromlist=['attr'], level=2)
@@ -54,12 +55,12 @@ class Using__package__(unittest.TestCase):
 
     def test_bad__package__(self):
         globals = {'__package__': '<not real>'}
-        self.assertRaises(SystemError, util.import_,'', globals, {},
+        self.assertRaises(SystemError, import_util.import_,'', globals, {},
                             ['relimport'], 1)
 
     def test_bunk__package__(self):
         globals = {'__package__': 42}
-        self.assertRaises(ValueError, util.import_, '', globals, {},
+        self.assertRaises(ValueError, import_util.import_, '', globals, {},
                             ['relimport'], 1)
 
 
@@ -80,7 +81,7 @@ class Setting__package__(unittest.TestCase):
         with util.mock_modules('top_level') as mock:
             with util.import_state(meta_path=[mock]):
                 del mock['top_level'].__package__
-                module = util.import_('top_level')
+                module = import_util.import_('top_level')
                 self.assert_(module.__package__ is None)
 
     # [package]
@@ -88,7 +89,7 @@ class Setting__package__(unittest.TestCase):
         with util.mock_modules('pkg.__init__') as mock:
             with util.import_state(meta_path=[mock]):
                 del mock['pkg'].__package__
-                module = util.import_('pkg')
+                module = import_util.import_('pkg')
                 self.assertEqual(module.__package__, 'pkg')
 
     # [submodule]
@@ -96,7 +97,7 @@ class Setting__package__(unittest.TestCase):
         with util.mock_modules('pkg.__init__', 'pkg.mod') as mock:
             with util.import_state(meta_path=[mock]):
                 del mock['pkg.mod'].__package__
-                pkg = util.import_('pkg.mod')
+                pkg = import_util.import_('pkg.mod')
                 module = getattr(pkg, 'mod')
                 self.assertEqual(module.__package__, 'pkg')
 
diff --git a/Lib/importlib/test/import_/test_caching.py b/Lib/importlib/test/import_/test_caching.py
index a4b7b46..3a895dc 100644
--- a/Lib/importlib/test/import_/test_caching.py
+++ b/Lib/importlib/test/import_/test_caching.py
@@ -1,5 +1,6 @@
 """Test that sys.modules is used properly by import."""
 from .. import util
+from . import util as import_util
 import sys
 from types import MethodType
 import unittest
@@ -23,7 +24,7 @@ class UseCache(unittest.TestCase):
         # [use cache]
         module_to_use = "some module found!"
         sys.modules['some_module'] = module_to_use
-        module = util.import_('some_module')
+        module = import_util.import_('some_module')
         self.assertEqual(id(module_to_use), id(module))
 
     def create_mock(self, *names, return_=None):
@@ -37,31 +38,31 @@ class UseCache(unittest.TestCase):
 
     # __import__ inconsistent between loaders and built-in import when it comes
     #   to when to use the module in sys.modules and when not to.
-    @util.importlib_only
+    @import_util.importlib_only
     def test_using_cache_after_loader(self):
         # [from cache on return]
         with self.create_mock('module') as mock:
             with util.import_state(meta_path=[mock]):
-                module = util.import_('module')
+                module = import_util.import_('module')
                 self.assertEquals(id(module), id(sys.modules['module']))
 
     # See test_using_cache_after_loader() for reasoning.
-    @util.importlib_only
+    @import_util.importlib_only
     def test_using_cache_for_assigning_to_attribute(self):
         # [from cache to attribute]
         with self.create_mock('pkg.__init__', 'pkg.module') as importer:
             with util.import_state(meta_path=[importer]):
-                module = util.import_('pkg.module')
+                module = import_util.import_('pkg.module')
                 self.assert_(hasattr(module, 'module'))
                 self.assert_(id(module.module), id(sys.modules['pkg.module']))
 
     # See test_using_cache_after_loader() for reasoning.
-    @util.importlib_only
+    @import_util.importlib_only
     def test_using_cache_for_fromlist(self):
         # [from cache for fromlist]
         with self.create_mock('pkg.__init__', 'pkg.module') as importer:
             with util.import_state(meta_path=[importer]):
-                module = util.import_('pkg', fromlist=['module'])
+                module = import_util.import_('pkg', fromlist=['module'])
                 self.assert_(hasattr(module, 'module'))
                 self.assertEquals(id(module.module), id(sys.modules['pkg.module']))
 
diff --git a/Lib/importlib/test/import_/test_fromlist.py b/Lib/importlib/test/import_/test_fromlist.py
index 4e0d86a..266a495 100644
--- a/Lib/importlib/test/import_/test_fromlist.py
+++ b/Lib/importlib/test/import_/test_fromlist.py
@@ -1,5 +1,6 @@
 """Test that the semantics relating to the 'fromlist' argument are correct."""
 from .. import util
+from . import util as import_util
 import unittest
 
 class ReturnValue(unittest.TestCase):
@@ -17,14 +18,14 @@ class ReturnValue(unittest.TestCase):
         # [import return]
         with util.mock_modules('pkg.__init__', 'pkg.module') as importer:
             with util.import_state(meta_path=[importer]):
-                module = util.import_('pkg.module')
+                module = import_util.import_('pkg.module')
                 self.assertEquals(module.__name__, 'pkg')
 
     def test_return_from_from_import(self):
         # [from return]
         with util.mock_modules('pkg.__init__', 'pkg.module')as importer:
             with util.import_state(meta_path=[importer]):
-                module = util.import_('pkg.module', fromlist=['attr'])
+                module = import_util.import_('pkg.module', fromlist=['attr'])
                 self.assertEquals(module.__name__, 'pkg.module')
 
 
@@ -49,14 +50,14 @@ class HandlingFromlist(unittest.TestCase):
         # [object case]
         with util.mock_modules('module') as importer:
             with util.import_state(meta_path=[importer]):
-                module = util.import_('module', fromlist=['attr'])
+                module = import_util.import_('module', fromlist=['attr'])
                 self.assertEquals(module.__name__, 'module')
 
     def test_unexistent_object(self):
         # [bad object]
         with util.mock_modules('module') as importer:
             with util.import_state(meta_path=[importer]):
-                module = util.import_('module', fromlist=['non_existent'])
+                module = import_util.import_('module', fromlist=['non_existent'])
                 self.assertEquals(module.__name__, 'module')
                 self.assert_(not hasattr(module, 'non_existent'))
 
@@ -64,7 +65,7 @@ class HandlingFromlist(unittest.TestCase):
         # [module]
         with util.mock_modules('pkg.__init__', 'pkg.module') as importer:
             with util.import_state(meta_path=[importer]):
-                module = util.import_('pkg', fromlist=['module'])
+                module = import_util.import_('pkg', fromlist=['module'])
                 self.assertEquals(module.__name__, 'pkg')
                 self.assert_(hasattr(module, 'module'))
                 self.assertEquals(module.module.__name__, 'pkg.module')
@@ -73,14 +74,14 @@ class HandlingFromlist(unittest.TestCase):
         # [no module]
         with util.mock_modules('pkg.__init__') as importer:
             with util.import_state(meta_path=[importer]):
-                module = util.import_('pkg', fromlist='non_existent')
+                module = import_util.import_('pkg', fromlist='non_existent')
                 self.assertEquals(module.__name__, 'pkg')
                 self.assert_(not hasattr(module, 'non_existent'))
 
     def test_empty_string(self):
         with util.mock_modules('pkg.__init__', 'pkg.mod') as importer:
             with util.import_state(meta_path=[importer]):
-                module = util.import_('pkg.mod', fromlist=[''])
+                module = import_util.import_('pkg.mod', fromlist=[''])
                 self.assertEquals(module.__name__, 'pkg.mod')
 
     def test_using_star(self):
@@ -88,7 +89,7 @@ class HandlingFromlist(unittest.TestCase):
         with util.mock_modules('pkg.__init__', 'pkg.module') as mock:
             with util.import_state(meta_path=[mock]):
                 mock['pkg'].__all__ = ['module']
-                module = util.import_('pkg', fromlist=['*'])
+                module = import_util.import_('pkg', fromlist=['*'])
                 self.assertEquals(module.__name__, 'pkg')
                 self.assert_(hasattr(module, 'module'))
                 self.assertEqual(module.module.__name__, 'pkg.module')
@@ -99,7 +100,7 @@ class HandlingFromlist(unittest.TestCase):
         with context as mock:
             with util.import_state(meta_path=[mock]):
                 mock['pkg'].__all__ = ['module1']
-                module = util.import_('pkg', fromlist=['module2', '*'])
+                module = import_util.import_('pkg', fromlist=['module2', '*'])
                 self.assertEquals(module.__name__, 'pkg')
                 self.assert_(hasattr(module, 'module1'))
                 self.assert_(hasattr(module, 'module2'))
diff --git a/Lib/importlib/test/import_/test_meta_path.py b/Lib/importlib/test/import_/test_meta_path.py
index a7b2591..59f11d3 100644
--- a/Lib/importlib/test/import_/test_meta_path.py
+++ b/Lib/importlib/test/import_/test_meta_path.py
@@ -1,4 +1,5 @@
 from .. import util
+from . import util as import_util
 from contextlib import nested
 from types import MethodType
 import unittest
@@ -22,7 +23,7 @@ class CallingOrder(unittest.TestCase):
             first.modules[mod] = 42
             second.modules[mod] = -13
             with util.import_state(meta_path=[first, second]):
-                self.assertEquals(util.import_(mod), 42)
+                self.assertEquals(import_util.import_(mod), 42)
 
     def test_continuing(self):
         # [continuing]
@@ -33,7 +34,7 @@ class CallingOrder(unittest.TestCase):
             first.find_module = lambda self, fullname, path=None: None
             second.modules[mod_name] = 42
             with util.import_state(meta_path=[first, second]):
-                self.assertEquals(util.import_(mod_name), 42)
+                self.assertEquals(import_util.import_(mod_name), 42)
 
 
 class CallSignature(unittest.TestCase):
@@ -58,7 +59,7 @@ class CallSignature(unittest.TestCase):
             log, wrapped_call = self.log(importer.find_module)
             importer.find_module = MethodType(wrapped_call, importer)
             with util.import_state(meta_path=[importer]):
-                util.import_(mod_name)
+                import_util.import_(mod_name)
                 assert len(log) == 1
                 args = log[0][0]
                 kwargs = log[0][1]
@@ -79,7 +80,7 @@ class CallSignature(unittest.TestCase):
             log, wrapped_call = self.log(importer.find_module)
             importer.find_module = MethodType(wrapped_call, importer)
             with util.import_state(meta_path=[importer]):
-                util.import_(mod_name)
+                import_util.import_(mod_name)
                 assert len(log) == 2
                 args = log[1][0]
                 kwargs = log[1][1]
diff --git a/Lib/importlib/test/import_/test_packages.py b/Lib/importlib/test/import_/test_packages.py
index 7f17c4b..5912c1f 100644
--- a/Lib/importlib/test/import_/test_packages.py
+++ b/Lib/importlib/test/import_/test_packages.py
@@ -1,4 +1,5 @@
 from .. import util
+from . import util as import_util
 import sys
 import unittest
 import importlib
@@ -11,13 +12,14 @@ class ParentModuleTests(unittest.TestCase):
     def test_import_parent(self):
         with util.mock_modules('pkg.__init__', 'pkg.module') as mock:
             with util.import_state(meta_path=[mock]):
-                module = util.import_('pkg.module')
+                module = import_util.import_('pkg.module')
                 self.assert_('pkg' in sys.modules)
 
     def test_bad_parent(self):
         with util.mock_modules('pkg.module') as mock:
             with util.import_state(meta_path=[mock]):
-                self.assertRaises(ImportError, util.import_, 'pkg.module')
+                self.assertRaises(ImportError,
+                                    import_util.import_, 'pkg.module')
 
 
 def test_main():
diff --git a/Lib/importlib/test/import_/test_path.py b/Lib/importlib/test/import_/test_path.py
index 5935dc4..b008b09 100644
--- a/Lib/importlib/test/import_/test_path.py
+++ b/Lib/importlib/test/import_/test_path.py
@@ -1,4 +1,5 @@
 from .. import util
+from . import util as import_util
 from contextlib import nested
 from imp import new_module
 import sys
@@ -41,11 +42,11 @@ class BaseTests(unittest.TestCase):
         with nested(misser, hitter):
             cache = dict(zip(search_path, (misser, hitter)))
             with util.import_state(path=path, path_importer_cache=cache):
-                util.import_(to_import)
+                import_util.import_(to_import)
         self.assertEquals(log[0], misser)
         self.assertEquals(log[1], hitter)
 
-    @util.importlib_only  # __import__ uses PyDict_GetItem(), bypassing log.
+    @import_util.importlib_only  # __import__ uses PyDict_GetItem(), bypassing log.
     def cache_use_test(self, to_import, entry, path=[]):
         # [cache check], [cache use]
         log = []
@@ -58,7 +59,7 @@ class BaseTests(unittest.TestCase):
             cache = LoggingDict()
             cache[entry] = importer
             with util.import_state(path=[entry], path_importer_cache=cache):
-                module = util.import_(to_import, fromlist=['a'])
+                module = import_util.import_(to_import, fromlist=['a'])
             self.assert_(module is importer[to_import])
         self.assertEquals(len(cache), 1)
         self.assertEquals([entry], log)
@@ -70,10 +71,10 @@ class BaseTests(unittest.TestCase):
             log.append(entry)
             raise ImportError
         with util.mock_modules(to_import) as importer:
-            hitter = util.mock_path_hook(entry, importer=importer)
+            hitter = import_util.mock_path_hook(entry, importer=importer)
             path_hooks = [logging_hook, logging_hook, hitter]
             with util.import_state(path_hooks=path_hooks, path=path):
-                util.import_(to_import)
+                import_util.import_(to_import)
                 self.assertEquals(sys.path_importer_cache[entry], importer)
         self.assertEquals(len(log), 2)
 
@@ -88,7 +89,7 @@ class BaseTests(unittest.TestCase):
                 raise ImportError
 
         try:
-            util.import_(to_import)
+            import_util.import_(to_import)
         except ImportError:
             pass
 
@@ -126,7 +127,7 @@ class __path__Tests(BaseTests):
             test('pkg.hit', entry, *args)
 
 
-    @util.importlib_only  # XXX Unknown reason why this fails.
+    @import_util.importlib_only  # XXX Unknown reason why this fails.
     def test_order(self):
         self.run_test(self.order_test, 'second', ('first', 'second'), ['first',
             'second'])
diff --git a/Lib/importlib/test/import_/test_relative_imports.py b/Lib/importlib/test/import_/test_relative_imports.py
index fb543ad..a1249a0 100644
--- a/Lib/importlib/test/import_/test_relative_imports.py
+++ b/Lib/importlib/test/import_/test_relative_imports.py
@@ -1,5 +1,6 @@
 """Test relative imports (PEP 328)."""
 from .. import util
+from . import util as import_util
 import sys
 import unittest
 
@@ -75,8 +76,8 @@ class RelativeImports(unittest.TestCase):
         create = 'pkg.__init__', 'pkg.mod2'
         globals_ = {'__package__': 'pkg'}, {'__name__': 'pkg.mod1'}
         def callback(global_):
-            util.import_('pkg')  # For __import__().
-            module = util.import_('', global_, fromlist=['mod2'], level=1)
+            import_util.import_('pkg')  # For __import__().
+            module = import_util.import_('', global_, fromlist=['mod2'], level=1)
             self.assertEqual(module.__name__, 'pkg')
             self.assert_(hasattr(module, 'mod2'))
             self.assertEqual(module.mod2.attr, 'pkg.mod2')
@@ -87,8 +88,9 @@ class RelativeImports(unittest.TestCase):
         create = 'pkg.__init__', 'pkg.mod2'
         globals_ = {'__package__': 'pkg'}, {'__name__': 'pkg.mod1'}
         def callback(global_):
-            util.import_('pkg')  # For __import__().
-            module = util.import_('mod2', global_, fromlist=['attr'], level=1)
+            import_util.import_('pkg')  # For __import__().
+            module = import_util.import_('mod2', global_, fromlist=['attr'],
+                                            level=1)
             self.assertEqual(module.__name__, 'pkg.mod2')
             self.assertEqual(module.attr, 'pkg.mod2')
         self.relative_import_test(create, globals_, callback)
@@ -99,8 +101,8 @@ class RelativeImports(unittest.TestCase):
         globals_ = ({'__package__': 'pkg'},
                     {'__name__': 'pkg', '__path__': ['blah']})
         def callback(global_):
-            util.import_('pkg')  # For __import__().
-            module = util.import_('', global_, fromlist=['module'],
+            import_util.import_('pkg')  # For __import__().
+            module = import_util.import_('', global_, fromlist=['module'],
                              level=1)
             self.assertEqual(module.__name__, 'pkg')
             self.assert_(hasattr(module, 'module'))
@@ -112,8 +114,8 @@ class RelativeImports(unittest.TestCase):
         create = 'pkg.__init__', 'pkg.module'
         globals_ = {'__package__': 'pkg'}, {'__name__': 'pkg.module'}
         def callback(global_):
-            util.import_('pkg')  # For __import__().
-            module = util.import_('', global_, fromlist=['attr'], level=1)
+            import_util.import_('pkg')  # For __import__().
+            module = import_util.import_('', global_, fromlist=['attr'], level=1)
             self.assertEqual(module.__name__, 'pkg')
         self.relative_import_test(create, globals_, callback)
 
@@ -124,7 +126,8 @@ class RelativeImports(unittest.TestCase):
         globals_ =  ({'__package__': 'pkg.subpkg1'},
                      {'__name__': 'pkg.subpkg1', '__path__': ['blah']})
         def callback(global_):
-            module = util.import_('', global_, fromlist=['subpkg2'], level=2)
+            module = import_util.import_('', global_, fromlist=['subpkg2'],
+                                            level=2)
             self.assertEqual(module.__name__, 'pkg')
             self.assert_(hasattr(module, 'subpkg2'))
             self.assertEqual(module.subpkg2.attr, 'pkg.subpkg2.__init__')
@@ -139,8 +142,8 @@ class RelativeImports(unittest.TestCase):
                     {'__name__': 'pkg.pkg1.pkg2.pkg3.pkg4.pkg5',
                         '__path__': ['blah']})
         def callback(global_):
-            util.import_(globals_[0]['__package__'])
-            module = util.import_('', global_, fromlist=['attr'], level=6)
+            import_util.import_(globals_[0]['__package__'])
+            module = import_util.import_('', global_, fromlist=['attr'], level=6)
             self.assertEqual(module.__name__, 'pkg')
         self.relative_import_test(create, globals_, callback)
 
@@ -150,8 +153,8 @@ class RelativeImports(unittest.TestCase):
         globals_ = ({'__package__': 'pkg'},
                     {'__name__': 'pkg', '__path__': ['blah']})
         def callback(global_):
-            util.import_('pkg')
-            self.assertRaises(ValueError, util.import_, '', global_,
+            import_util.import_('pkg')
+            self.assertRaises(ValueError, import_util.import_, '', global_,
                                 fromlist=['top_level'], level=2)
         self.relative_import_test(create, globals_, callback)
 
@@ -160,14 +163,14 @@ class RelativeImports(unittest.TestCase):
         create = ['top_level', 'pkg.__init__', 'pkg.module']
         globals_ = {'__package__': 'pkg'}, {'__name__': 'pkg.module'}
         def callback(global_):
-            util.import_('pkg')
-            self.assertRaises(ValueError, util.import_, '', global_,
+            import_util.import_('pkg')
+            self.assertRaises(ValueError, import_util.import_, '', global_,
                                 fromlist=['top_level'], level=2)
         self.relative_import_test(create, globals_, callback)
 
     def test_empty_name_w_level_0(self):
         # [empty name]
-        self.assertRaises(ValueError, util.import_, '')
+        self.assertRaises(ValueError, import_util.import_, '')
 
     def test_import_from_different_package(self):
         # Test importing from a different package than the caller.
@@ -181,8 +184,8 @@ class RelativeImports(unittest.TestCase):
                     '__runpy_pkg__.uncle.cousin.nephew']
         globals_ = {'__package__': '__runpy_pkg__.__runpy_pkg__'}
         def callback(global_):
-            util.import_('__runpy_pkg__.__runpy_pkg__')
-            module = util.import_('uncle.cousin', globals_, {},
+            import_util.import_('__runpy_pkg__.__runpy_pkg__')
+            module = import_util.import_('uncle.cousin', globals_, {},
                                     fromlist=['nephew'],
                                 level=2)
             self.assertEqual(module.__name__, '__runpy_pkg__.uncle.cousin')
diff --git a/Lib/importlib/test/import_/util.py b/Lib/importlib/test/import_/util.py
new file mode 100644
index 0000000..3481b99
--- /dev/null
+++ b/Lib/importlib/test/import_/util.py
@@ -0,0 +1,33 @@
+import functools
+import importlib
+
+
+using___import__ = False
+
+
+def import_(*args, **kwargs):
+    """Delegate to allow for injecting different implementations of import."""
+    if using___import__:
+        return __import__(*args, **kwargs)
+    return importlib.Import()(*args, **kwargs)
+
+
+def importlib_only(fxn):
+    """Decorator to mark which tests are not supported by the current
+    implementation of __import__()."""
+    def inner(*args, **kwargs):
+        if using___import__:
+            return
+        else:
+            return fxn(*args, **kwargs)
+    functools.update_wrapper(inner, fxn)
+    return inner
+
+
+def mock_path_hook(*entries, importer):
+    """A mock sys.path_hooks entry."""
+    def hook(entry):
+        if entry not in entries:
+            raise ImportError
+        return importer
+    return hook
diff --git a/Lib/importlib/test/util.py b/Lib/importlib/test/util.py
index 1518d74..f41a661 100644
--- a/Lib/importlib/test/util.py
+++ b/Lib/importlib/test/util.py
@@ -1,33 +1,10 @@
-from importlib import Import
-
 from contextlib import contextmanager
-from functools import update_wrapper
 import imp
 import os.path
 from test.support import unlink
 import sys
 
 
-using___import__ = False
-
-def import_(*args, **kwargs):
-    """Delegate to allow for injecting different implementations of import."""
-    if using___import__:
-        return __import__(*args, **kwargs)
-    return Import()(*args, **kwargs)
-
-def importlib_only(fxn):
-    """Decorator to mark which tests are not supported by the current
-    implementation of __import__()."""
-    def inner(*args, **kwargs):
-        if using___import__:
-            return
-        else:
-            return fxn(*args, **kwargs)
-    update_wrapper(inner, fxn)
-    return inner
-
-
 def case_insensitive_tests(class_):
     """Class decorator that nullifies tests that require a case-insensitive
     file system."""
@@ -142,12 +119,3 @@ class mock_modules:
 
     def __exit__(self, *exc_info):
         self._uncache.__exit__(None, None, None)
-
-
-def mock_path_hook(*entries, importer):
-    """A mock sys.path_hooks entry."""
-    def hook(entry):
-        if entry not in entries:
-            raise ImportError
-        return importer
-    return hook