Fix tests

Author: bschoenmaeckers

instrumentation/opentelemetry-instrumentation-sqlalchemy/tests/test_sqlalchemy.py

@@ -129,11 +129,12 @@ async def run():
     def test_not_recording(self):
         mock_tracer = mock.Mock()
         mock_span = mock.Mock()
+        mock_context = mock.MagicMock()
         mock_span.is_recording.return_value = False
-        mock_span.__enter__ = mock.Mock(return_value=(mock.Mock(), None))
-        mock_span.__exit__ = mock.Mock(return_value=None)
-        mock_tracer.start_span.return_value = mock_span
-        mock_tracer.start_as_current_span.return_value = mock_span
+        mock_context.__enter__.return_value = mock_span
+        mock_context.__exit__.return_value = None
+        mock_tracer.start_span.return_value = mock_context
+        mock_tracer.start_as_current_span.return_value = mock_context
         with mock.patch("opentelemetry.trace.get_tracer") as tracer:
             tracer.return_value = mock_tracer
             engine = create_engine("sqlite:///:memory:")