Implement test for sys.path_importer_cache having None for
importlib.machinery.PathFinder.
diff --git a/Lib/importlib/test/import_/test_path.py b/Lib/importlib/test/import_/test_path.py
index 3eb22c9..70dae2f 100644
--- a/Lib/importlib/test/import_/test_path.py
+++ b/Lib/importlib/test/import_/test_path.py
@@ -3,6 +3,7 @@
from . import util as import_util
from contextlib import nested
from imp import new_module
+import os
import sys
from types import MethodType
import unittest
@@ -191,8 +192,19 @@
def test_path_importer_cache_has_None(self):
# Test that the default hook is used when sys.path_importer_cache
# contains None for a path.
- # TODO(brett.cannon) implement
- pass
+ module = '<test module>'
+ importer = util.mock_modules(module)
+ path = '<test path>'
+ # XXX Not blackbox.
+ original_hook = machinery.PathFinder._default_hook
+ mock_hook = import_util.mock_path_hook(path, importer=importer)
+ machinery.PathFinder._default_hook = staticmethod(mock_hook)
+ try:
+ with util.import_state(path_importer_cache={path: None}):
+ loader = machinery.PathFinder.find_module(module, path=[path])
+ self.assert_(loader is importer)
+ finally:
+ machinery.PathFinder._default_hook = original_hook
def test_path_hooks(self):
# Test that sys.path_hooks is used.