fix: typing errors caused by optionals in tests

tests/test_client.py

@@ -87,6 +87,8 @@ async def consume(stream):
     async with client:
         await client.send(topic, value=event, key="1")
         stream = stream_engine.get_stream("my-stream")
+        assert stream is not None
+        assert stream.consumer is not None
         assert stream.consumer.assignment() == [tp0, tp1, tp2]
         assert stream.consumer.last_stable_offset(tp0) == 0
         assert stream.consumer.highwater(tp0) == 1
@@ -164,6 +166,7 @@ async def my_stream(cr: ConsumerRecord, stream: Stream):
 
         # give some time so the `commit` can finished
         await asyncio.sleep(1)
+        assert my_stream.consumer is not None
         assert await my_stream.consumer.committed(tp) == 100
 
     # check that the event was consumed
@@ -381,6 +384,7 @@ async def stream(stream):
         await client.send(topic_name, value=value, key=key, partition=10)
 
         await asyncio.sleep(1e-10)
+        assert stream.consumer is not None
         assert stream.consumer.partitions_for_topic(topic_name) == set([0, 1, 2, 10])
 
 
@@ -410,6 +414,8 @@ async def consume(stream):
         ]
 
         stream = stream_engine.get_stream("my-stream")
+        assert stream is not None
+        assert stream.consumer is not None
         assert (await stream.consumer.end_offsets(topic_partitions)) == {
             TopicPartition(topic="local--kstreams", partition=0): 2,
             TopicPartition(topic="local--kstreams", partition=2): 1,
@@ -445,6 +451,7 @@ async def my_stream(stream: Stream):
 
         await asyncio.sleep(1e-10)
         # check that everything was commited
+        assert my_stream.consumer is not None
         assert (await my_stream.consumer.committed(tp)) == total_events - 1
 
 
@@ -609,6 +616,9 @@ async def func_stream(consumer: Stream):
             # to stop the `forever` consumption
             await asyncio.wait_for(stream.start(), timeout=1.0)
 
+        assert stream.consumer is not None
+        assert stream.rebalance_listener is not None
+
         # simulate partitions assigned on rebalance
         await stream.rebalance_listener.on_partitions_assigned(assigned=assignments)
         assert stream.consumer.assignment() == [tp0, tp1, tp2]

tests/test_consumer.py

@@ -91,6 +91,7 @@ async def my_stream(stream: Stream):
         assert rebalance_listener.stream == my_stream
 
         # checking that the subscription has also the rebalance_listener
+        assert my_stream.consumer is not None
         assert my_stream.consumer._subscription._listener == rebalance_listener
 
         await stream_engine.stop()
@@ -172,6 +173,7 @@ async def hello_stream(stream: Stream):
 
         assert isinstance(rebalance_listener, ManualCommitRebalanceListener)
         # checking that the subscription has also the rebalance_listener
+        assert hello_stream.consumer is not None
         assert isinstance(
             hello_stream.consumer._subscription._listener, ManualCommitRebalanceListener
         )

tests/test_monitor.py

@@ -127,6 +127,8 @@ async def my_coroutine(_):
     stream_engine.add_stream(stream=stream)
     await stream.start()
 
+    assert stream.consumer is not None
+
     await stream_engine.monitor.generate_consumer_metrics(stream.consumer)
     consumer = stream.consumer
 

tests/test_stream_engine.py

@@ -10,6 +10,13 @@
 from kstreams.exceptions import DuplicateStreamException, EngineNotStartedException
 
 
+class DummyDeserializer:
+    async def deserialize(
+        self, consumer_record: ConsumerRecord, **kwargs
+    ) -> ConsumerRecord:
+        return consumer_record
+
+
 @pytest.mark.asyncio
 async def test_add_streams(stream_engine: StreamEngine):
     topic = "local--hello-kpn"
@@ -42,9 +49,7 @@ async def my_stream(_):
 async def test_add_stream_as_instance(stream_engine: StreamEngine):
     topics = ["local--hello-kpn", "local--hello-kpn-2"]
 
-    class MyDeserializer: ...
-
-    deserializer = MyDeserializer()
+    deserializer = DummyDeserializer()
 
     async def processor(stream: Stream):
         pass
@@ -73,9 +78,7 @@ async def processor(stream: Stream):
 async def test_remove_existing_stream(stream_engine: StreamEngine):
     topic = "local--hello-kpn"
 
-    class MyDeserializer: ...
-
-    deserializer = MyDeserializer()
+    deserializer = DummyDeserializer()
 
     async def processor(stream: Stream):
         pass
@@ -97,9 +100,7 @@ async def processor(stream: Stream):
 async def test_remove_missing_stream(stream_engine: StreamEngine):
     topic = "local--hello-kpn"
 
-    class MyDeserializer: ...
-
-    deserializer = MyDeserializer()
+    deserializer = DummyDeserializer()
 
     async def processor(stream: Stream):
         pass
@@ -119,9 +120,7 @@ async def processor(stream: Stream):
 async def test_remove_existing_stream_stops_stream(stream_engine: StreamEngine):
     topic = "local--hello-kpn"
 
-    class MyDeserializer: ...
-
-    deserializer = MyDeserializer()
+    deserializer = DummyDeserializer()
 
     async def processor(stream: Stream):
         pass
@@ -136,7 +135,7 @@ async def processor(stream: Stream):
 
     with mock.patch.multiple(Stream, start=mock.DEFAULT, stop=mock.DEFAULT):
         await stream_engine.remove_stream(my_stream)
-        Stream.stop.assert_awaited()
+        Stream.stop.assert_awaited()  # type: ignore
 
 
 @pytest.mark.asyncio
@@ -149,13 +148,13 @@ async def stream(_): ...
     with mock.patch.multiple(Consumer, start=mock.DEFAULT, stop=mock.DEFAULT):
         with mock.patch.multiple(Producer, start=mock.DEFAULT, stop=mock.DEFAULT):
             await stream_engine.start()
-            stream_engine._producer.start.assert_awaited()
+            stream_engine._producer.start.assert_awaited()  # type: ignore
 
             await asyncio.sleep(0)  # Allow stream coroutine to run once
             Consumer.start.assert_awaited()
 
             await stream_engine.stop()
-            stream_engine._producer.stop.assert_awaited()
+            stream_engine._producer.stop.assert_awaited()  # type: ignore
             Consumer.stop.assert_awaited()
 
 

tests/test_streams.py

@@ -241,6 +241,7 @@ async def stream(_): ...
         # switch the current Task to the one running in background
         await asyncio.sleep(0.1)
 
+        assert stream.consumer is not None
         assert stream.consumer._auto_offset_reset == "earliest"
         assert not stream.consumer._enable_auto_commit
 
@@ -291,6 +292,7 @@ async def streaming_fn(_):
             await asyncio.sleep(0.1)
 
             Consumer.start.assert_awaited()
+            assert stream_engine._producer is not None
             stream_engine._producer.start.assert_awaited()
 
             await stream_engine.stop()
@@ -377,6 +379,7 @@ async def stream(my_stream):
 
         await stream.start()
         # simulate a partitions assigned rebalance
+        assert stream.rebalance_listener is not None
         await stream.rebalance_listener.on_partitions_assigned(assigned=assignments)
 
         seek_mock.assert_called_once_with(
@@ -428,5 +431,6 @@ async def stream(my_stream):
 
         await stream.start()
         # simulate a partitions assigned rebalance
+        assert stream.rebalance_listener is not None
         await stream.rebalance_listener.on_partitions_assigned(assigned=assignments)
         seek_mock.assert_not_called()