Fixed name syntax error

src/python/grpcio/grpc/_channel.py

@@ -353,12 +353,12 @@ class _Rendezvous(grpc.RpcError, grpc.Future, grpc.Call):
     else:
       return max(self._deadline - time.time(), 0)
 
-  def add_cancellation_callback(self, callback):
+  def add_callback(self, callback):
     with self._state.condition:
       if self._state.callbacks is None:
         return False
       else:
-        self._state.callbacks.append(lambda unused_future: callback())
+        self._state.callbacks.append(lambda: callback())
         return True
 
   def initial_metadata(self):

src/python/grpcio/grpc/beta/_client_adaptations.py

@@ -67,7 +67,7 @@ def _abortion(rpc_error_call):
   error_kind = face.Abortion.Kind.LOCAL_FAILURE if pair is None else pair[0]
   return face.Abortion(
       error_kind, rpc_error_call.initial_metadata(),
-      rpc_error_call.trailing_metadata(), code, rpc_error_code.details())
+      rpc_error_call.trailing_metadata(), code, rpc_error_call.details())
 
 
 def _abortion_error(rpc_error_call):
@@ -159,9 +159,11 @@ class _Rendezvous(future.Future, face.Call):
     return self._call.time_remaining()
 
   def add_abortion_callback(self, abortion_callback):
-    registered = self._call.add_callback(
+    def done_callback():
-        lambda: abortion_callback(_abortion(self._call)))
+      if self.code() is not grpc.StatusCode.OK:
-    return None if registered else _abortion(self._call)
+        abortion_callback(_abortion(self._call))
+    registered = self._call.add_callback(done_callback)
+    return None if registered else done_callback()
 
   def protocol_context(self):
     return _InvocationProtocolContext()

src/python/grpcio_tests/tests/unit/framework/interfaces/face/_future_invocation_asynchronous_event_service.py

@@ -434,11 +434,13 @@ class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.
       for test_messages in test_messages_sequence:
         request = test_messages.request()
         callback = _Callback()
+        abortion_callback = _Callback()
 
         with self._control.fail():
           response_future = self._invoker.future(group, method)(
               request, _3069_test_constant.REALLY_SHORT_TIMEOUT)
           response_future.add_done_callback(callback)
+          response_future.add_abortion_callback(abortion_callback)
 
           self.assertIs(callback.future(), response_future)
           # Because the servicer fails outside of the thread from which the
@@ -450,6 +452,7 @@ class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.
           with self.assertRaises(face.ExpirationError):
             response_future.result()
           self.assertIsNotNone(response_future.traceback())
+          self.assertIsNotNone(abortion_callback.future())
 
   def testFailedUnaryRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (
@@ -472,11 +475,13 @@ class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.
       for test_messages in test_messages_sequence:
         requests = test_messages.requests()
         callback = _Callback()
+        abortion_callback = _Callback()
 
         with self._control.fail():
           response_future = self._invoker.future(group, method)(
               iter(requests), _3069_test_constant.REALLY_SHORT_TIMEOUT)
           response_future.add_done_callback(callback)
+          response_future.add_abortion_callback(abortion_callback)
 
           self.assertIs(callback.future(), response_future)
           # Because the servicer fails outside of the thread from which the
@@ -488,6 +493,7 @@ class TestCase(six.with_metaclass(abc.ABCMeta, test_coverage.Coverage, unittest.
           with self.assertRaises(face.ExpirationError):
             response_future.result()
           self.assertIsNotNone(response_future.traceback())
+          self.assertIsNotNone(abortion_callback.future())
 
   def testFailedStreamRequestStreamResponse(self):
     for (group, method), test_messages_sequence in (