Hotfix: Workaround for stream bug (Azure-Samples#664)

* Adding anchors

* Rm fund notice

* Account for bug

* rm unrelated change

Author: pamelafox

app/backend/approaches/chatreadretrieveread.py

@@ -232,7 +232,9 @@ async def run_with_streaming(
         extra_info, chat_coroutine = await self.run_until_final_call(history, overrides, should_stream=True)
         yield extra_info
         async for event in await chat_coroutine:
-            yield event
+            # "2023-07-01-preview" API version has a bug where first response has empty choices
+            if event["choices"]:
+                yield event
 
     def get_messages_from_history(
         self,

tests/conftest.py

@@ -32,15 +32,19 @@ async def mock_acreate(*args, **kwargs):
 def mock_openai_chatcompletion(monkeypatch):
     class AsyncChatCompletionIterator:
         def __init__(self, answer):
-            self.num = 1
+            self.num = 2
             self.answer = answer
 
         def __aiter__(self):
             return self
 
         async def __anext__(self):
-            if self.num == 1:
-                self.num = 0
+            if self.num == 2:
+                self.num -= 1
+                # Emulate the first response being empty - bug with "2023-07-01-preview"
+                return openai.util.convert_to_openai_object({"choices": []})
+            elif self.num == 1:
+                self.num -= 1
                 return openai.util.convert_to_openai_object({"choices": [{"delta": {"content": self.answer}}]})
             else:
                 raise StopAsyncIteration