Refs #348 -- Marked problem test cases as xfail.

- test_receive_cancel failing with TypeError inside redis-py.
- test_message_expiry__group_send__one_channel_expires_message hanging
  indefinitely. Added pytest-timeout with global timeout of 10s.

setup.cfg

@@ -2,6 +2,7 @@
 addopts = -p no:django
 testpaths = tests
 asyncio_mode = auto
+timeout = 10
 
 [flake8]
 exclude = venv/*,tox/*,specs/*,build/*

setup.py

@@ -13,6 +13,7 @@
     "pytest",
     "pytest-asyncio",
     "async-timeout",
+    "pytest-timeout",
 ]
 
 

tests/test_core.py

@@ -419,6 +419,12 @@ def test_repeated_group_send_with_async_to_sync(channel_layer):
         pytest.fail(f"repeated async_to_sync wrapped group_send calls raised {exc}")
 
 
+@pytest.mark.xfail(
+    reason="""
+Fails with error in redis-py: int() argument must be a string, a bytes-like
+object or a real number, not 'NoneType'. Refs: #348
+"""
+)
 @pytest.mark.asyncio
 async def test_receive_cancel(channel_layer):
     """
@@ -551,6 +557,7 @@ async def test_message_expiry__group_send(channel_layer):
             await channel_layer.receive(channel_name)
 
 
+@pytest.mark.xfail(reason="Fails with timeout. Refs: #348")
 @pytest.mark.asyncio
 async def test_message_expiry__group_send__one_channel_expires_message(channel_layer):
     expiry = 3

tests/test_sentinel.py

@@ -461,6 +461,12 @@ async def test_group_send_capacity_multiple_channels(channel_layer, caplog):
         )
 
 
+@pytest.mark.xfail(
+    reason="""
+Fails with error in redis-py: int() argument must be a string, a bytes-like
+object or a real number, not 'NoneType'. Refs: #348
+"""
+)
 @pytest.mark.asyncio
 async def test_receive_cancel(channel_layer):
     """
@@ -593,6 +599,7 @@ async def test_message_expiry__group_send(channel_layer):
             await channel_layer.receive(channel_name)
 
 
+@pytest.mark.xfail(reason="Fails with timeout. Refs: #348")
 @pytest.mark.asyncio
 async def test_message_expiry__group_send__one_channel_expires_message(channel_layer):
     expiry = 3