bpo-37251: Removes __code__ check from _is_async_obj. (GH-15830)

2 files changed, 17 insertions, 3 deletions

diff --git a/Lib/unittest/mock.py b/Lib/unittest/mock.py
index c26b367a4dc..50e49596551 100644
--- a/Lib/unittest/mock.py
+++ b/Lib/unittest/mock.py
@@ -46,10 +46,9 @@ FILTER_DIR = True
 _safe_super = super
 
 def _is_async_obj(obj):
-    if getattr(obj, '__code__', None):
-        return asyncio.iscoroutinefunction(obj) or inspect.isawaitable(obj)
-    else:
+    if _is_instance_mock(obj) and not isinstance(obj, AsyncMock):
         return False
+    return asyncio.iscoroutinefunction(obj) or inspect.isawaitable(obj)
 
 
 def _is_async_func(func):
diff --git a/Lib/unittest/test/testmock/testasync.py b/Lib/unittest/test/testmock/testasync.py
index 865cfdc0026..550234223cc 100644
--- a/Lib/unittest/test/testmock/testasync.py
+++ b/Lib/unittest/test/testmock/testasync.py
@@ -18,6 +18,10 @@ class AsyncClass:
     def normal_method(self):
         pass
 
+class AwaitableClass:
+    def __await__(self):
+        yield
+
 async def async_func():
     pass
 
@@ -160,6 +164,10 @@ class AsyncAutospecTest(unittest.TestCase):
         with self.assertRaises(RuntimeError):
             create_autospec(async_func, instance=True)
 
+    def test_create_autospec_awaitable_class(self):
+        awaitable_mock = create_autospec(spec=AwaitableClass())
+        self.assertIsInstance(create_autospec(awaitable_mock), AsyncMock)
+
     def test_create_autospec(self):
         spec = create_autospec(async_func_args)
         awaitable = spec(1, 2, c=3)
@@ -321,6 +329,13 @@ class AsyncSpecSetTest(unittest.TestCase):
         self.assertIsInstance(mock.normal_method, MagicMock)
         self.assertIsInstance(mock, MagicMock)
 
+    def test_magicmock_lambda_spec(self):
+        mock_obj = MagicMock()
+        mock_obj.mock_func = MagicMock(spec=lambda x: x)
+
+        with patch.object(mock_obj, "mock_func") as cm:
+            self.assertIsInstance(cm, MagicMock)
+
 
 class AsyncArguments(unittest.TestCase):
     def test_add_return_value(self):