Fix NotADirectory error when calling files on a submodule of a zipped namespace package

Author: sfc-gh-wzhao

importlib_resources/readers.py

@@ -156,7 +156,7 @@ def _candidate_paths(cls, path_str):
     def _resolve_zip_path(path_str):
         for match in reversed(list(re.finditer(r'[\\/]', path_str))):
             with contextlib.suppress(
-                FileNotFoundError, IsADirectoryError, PermissionError
+                FileNotFoundError, IsADirectoryError, NotADirectoryError, PermissionError
             ):
                 inner = path_str[match.end() :].replace('\\', '/') + '/'
                 yield ZipPath(path_str[: match.start()], inner.lstrip('/'))

importlib_resources/tests/namespacedata01/subdirectory/binary.file

@@ -31,8 +31,8 @@ class ContentsZipTests(ContentsTests, util.ZipSetup, unittest.TestCase):
 class ContentsNamespaceTests(ContentsTests, unittest.TestCase):
     expected = {
         # no __init__ because of namespace design
-        # no subdirectory as incidental difference in fixture
         'binary.file',
+        'subdirectory',
         'utf-16.file',
         'utf-8.file',
     }

importlib_resources/tests/test_contents.py

@@ -58,6 +58,10 @@ def setUp(self):
         self.data = namespacedata01
 
 
+class OpenNamespaceZipTests(FilesTests, util.ZipSetup, unittest.TestCase):
+    ZIP_MODULE = 'namespacedata01'
+
+
 class SiteDir:
     def setUp(self):
         self.fixtures = contextlib.ExitStack()

importlib_resources/tests/test_files.py

@@ -81,5 +81,9 @@ class OpenZipTests(OpenTests, util.ZipSetup, unittest.TestCase):
     pass
 
 
+class OpenNamespaceZipTests(OpenTests, util.ZipSetup, unittest.TestCase):
+    ZIP_MODULE = 'namespacedata01'
+
+
 if __name__ == '__main__':
     unittest.main()

importlib_resources/tests/test_open.py

@@ -76,5 +76,20 @@ def setUp(self):
         self.data = namespacedata01
 
 
+class ReadNamespaceZipTests(ReadTests, util.ZipSetup, unittest.TestCase):
+    ZIP_MODULE = 'namespacedata01'
+
+    def test_read_submodule_resource(self):
+        submodule = import_module('namespacedata01.subdirectory')
+        result = resources.files(submodule).joinpath('binary.file').read_bytes()
+        self.assertEqual(result, b'\0\1\2\3')
+
+    def test_read_submodule_resource_by_name(self):
+        result = (
+            resources.files('namespacedata01.subdirectory').joinpath('binary.file').read_bytes()
+        )
+        self.assertEqual(result, b'\0\1\2\3')
+
+
 if __name__ == '__main__':
     unittest.main()

importlib_resources/tests/test_read.py

@@ -26,7 +26,7 @@ def test_iterdir(self):
             contents.remove('__pycache__')
         except (KeyError, ValueError):
             pass
-        self.assertEqual(contents, {'binary.file', 'utf-16.file', 'utf-8.file'})
+        self.assertEqual(contents, {'subdirectory', 'binary.file', 'utf-16.file', 'utf-8.file'})
 
     def test_iterdir_duplicate(self):
         data01 = pathlib.Path(__file__).parent.joinpath('data01')
@@ -67,7 +67,11 @@ def test_join_path(self):
             os.path.join('namespacedata01', 'binary.file'),
         )
         self.assertEqual(
-            str(path.joinpath('subdirectory'))[len(prefix) + 1 :],
+            str(path.joinpath('subdirectory')._paths[0])[len(prefix) + 1 :],
+            os.path.join('namespacedata01', 'subdirectory'),
+        )
+        self.assertEqual(
+            str(path.joinpath('subdirectory')._paths[1])[len(prefix) + 1 :],
             os.path.join('data01', 'subdirectory'),
         )
         self.assertEqual(

importlib_resources/tests/test_reader.py

@@ -186,15 +186,31 @@ def test_submodule_contents(self):
             contents.remove('__pycache__')
         except KeyError:
             pass
-        self.assertEqual(contents, {'binary.file', 'utf-8.file', 'utf-16.file'})
+        self.assertEqual(contents, {'subdirectory', 'binary.file', 'utf-8.file', 'utf-16.file'})
 
     def test_submodule_contents_by_name(self):
         contents = names(resources.files('namespacedata01'))
         try:
             contents.remove('__pycache__')
         except KeyError:
             pass
-        self.assertEqual(contents, {'binary.file', 'utf-8.file', 'utf-16.file'})
+        self.assertEqual(contents, {'subdirectory', 'binary.file', 'utf-8.file', 'utf-16.file'})
+
+    def test_submodule_sub_contents(self):
+        contents = names(resources.files(import_module('namespacedata01.subdirectory')))
+        try:
+            contents.remove('__pycache__')
+        except KeyError:
+            pass
+        self.assertEqual(contents, {'binary.file'})
+
+    def test_submodule_sub_contents_by_name(self):
+        contents = names(resources.files('namespacedata01.subdirectory'))
+        try:
+            contents.remove('__pycache__')
+        except KeyError:
+            pass
+        self.assertEqual(contents, {'binary.file'})
 
 
 class ResourceFromNamespaceDiskTests(ResourceFromNamespaceTests, unittest.TestCase):