test that all names are present in __all__ (#1138)

JelleZijlstra · web-flow · commit d00b3457babd · 2022-04-15T17:10:25.000-07:00
diff --git a/src/test_typing_extensions.py b/src/test_typing_extensions.py
@@ -2743,6 +2743,27 @@ def test_typing_extensions_includes_standard(self):
         for name in a:
             self.assertTrue(hasattr(typing_extensions, name))
 
+    def test_all_names_in___all__(self):
+        exclude = {
+            'GenericMeta',
+            'KT',
+            'PEP_560',
+            'T',
+            'T_co',
+            'T_contra',
+            'VT',
+        }
+        actual_names = {
+            name for name in dir(typing_extensions)
+            if not name.startswith("_")
+            and not isinstance(getattr(typing_extensions, name), types.ModuleType)
+        }
+        # Make sure all public names are in __all__
+        self.assertEqual({*exclude, *typing_extensions.__all__},
+                         actual_names)
+        # Make sure all excluded names actually exist
+        self.assertLessEqual(exclude, actual_names)
+
     def test_typing_extensions_defers_when_possible(self):
         exclude = {
             'overload',
diff --git a/src/typing_extensions.py b/src/typing_extensions.py
@@ -15,6 +15,8 @@
     'Final',
     'LiteralString',
     'ParamSpec',
+    'ParamSpecArgs',
+    'ParamSpecKwargs',
     'Self',
     'Type',
     'TypeVarTuple',
@@ -933,9 +935,9 @@ def __init_subclass__(cls, *args, **kwargs):
         _BaseGenericAlias = typing._GenericAlias
     try:
         # 3.9+
-        from typing import GenericAlias
+        from typing import GenericAlias as _typing_GenericAlias
     except ImportError:
-        GenericAlias = typing._GenericAlias
+        _typing_GenericAlias = typing._GenericAlias
 
     def get_origin(tp):
         """Get the unsubscripted version of a type.
@@ -954,7 +956,7 @@ def get_origin(tp):
         """
         if isinstance(tp, _AnnotatedAlias):
             return Annotated
-        if isinstance(tp, (typing._GenericAlias, GenericAlias, _BaseGenericAlias,
+        if isinstance(tp, (typing._GenericAlias, _typing_GenericAlias, _BaseGenericAlias,
                            ParamSpecArgs, ParamSpecKwargs)):
             return tp.__origin__
         if tp is typing.Generic:
@@ -974,7 +976,7 @@ def get_args(tp):
         """
         if isinstance(tp, _AnnotatedAlias):
             return (tp.__origin__,) + tp.__metadata__
-        if isinstance(tp, (typing._GenericAlias, GenericAlias)):
+        if isinstance(tp, (typing._GenericAlias, _typing_GenericAlias)):
             if getattr(tp, "_special", False):
                 return ()
             res = tp.__args__
