async def test_read_stream_success():
event_1_id = uuid4()
event_2_id = uuid4()
convo = ReadStreamEvents("my-stream", 0)
response = proto.ReadStreamEventsCompleted()
response.result = msg.ReadEventResult.Success
response.next_event_number = 10
response.last_event_number = 9
response.is_end_of_stream = True
response.last_commit_position = 8
event_1 = proto.ResolvedIndexedEvent()
event_1.event.event_stream_id = "stream-123"
event_1.event.event_number = 32
event_1.event.event_id = event_1_id.bytes_le
event_1.event.event_type = "event-type"
event_1.event.data_content_type = msg.ContentType.Json
event_1.event.metadata_content_type = msg.ContentType.Binary
event_1.event.data = """
{
'color': 'red',
'winner': true
}
""".encode("UTF-8")
event_2 = proto.ResolvedIndexedEvent()
event_2.CopyFrom(event_1)
event_2.event.event_type = "event-2-type"
event_2.event.event_id = event_2_id.bytes_le
event_2.event.event_number = 33
response.events.extend([event_1, event_2])
await convo.respond_to(
msg.InboundMessage(uuid4(), msg.TcpCommand.ReadEventCompleted,
response.SerializeToString()),
None,
)
result = await convo.result
assert isinstance(result, msg.StreamSlice)
[event_1, event_2] = result.events
assert event_1.event.stream == "stream-123"
assert event_1.event.id == event_1_id
assert event_1.event.type == "event-type"
assert event_1.event.event_number == 32
assert event_2.event.stream == "stream-123"
assert event_2.event.id == event_2_id
assert event_2.event.type == "event-2-type"
assert event_2.event.event_number == 33
async def test_read_stream_request():
output = Queue()
convo = ReadStreamEvents("my-stream", 23)
await convo.start(output)
request = await output.get()
body = proto.ReadStreamEvents()
body.ParseFromString(request.payload)
assert request.command is msg.TcpCommand.ReadStreamEventsForward
assert body.event_stream_id == "my-stream"
assert body.from_event_number == 23
assert body.resolve_link_tos is True
assert body.require_master is False
assert body.max_count == 100
async def test_stream_deleted():
convo = ReadStreamEvents("my-stream")
response = proto.ReadStreamEventsCompleted()
response.result = msg.ReadStreamResult.StreamDeleted
response.is_end_of_stream = False
response.next_event_number = 0
response.last_event_number = 0
response.last_commit_position = 0
await convo.respond_to(
msg.InboundMessage(
uuid4(),
msg.TcpCommand.ReadStreamEventsForwardCompleted,
response.SerializeToString(),
),
None,
)
with pytest.raises(exceptions.StreamDeleted) as exn:
await convo.result
assert exn.stream == "my-stream"
assert exn.conversation_id == convo.conversation_id
async def test_read_error():
convo = ReadStreamEvents("my-stream")
response = proto.ReadStreamEventsCompleted()
response.result = msg.ReadStreamResult.Error
response.is_end_of_stream = False
response.next_event_number = 0
response.last_event_number = 0
response.last_commit_position = 0
response.error = "Something really weird just happened"
await convo.respond_to(
msg.InboundMessage(
uuid4(),
msg.TcpCommand.ReadStreamEventsForwardCompleted,
response.SerializeToString(),
),
None,
)
with pytest.raises(exceptions.ReadError) as exn:
await convo.result
assert exn.stream == "my-stream"
assert exn.conversation_id == convo.conversation_id