mirror of
https://github.com/NousResearch/hermes-agent.git
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e36c804bc2
When a model (e.g. mimo-v2-pro) streams intermediate text alongside tool
calls ("Let me search for that") but then returns empty after processing
tool results, the stream consumer already_sent flag is True from the
earlier text delivery. The gateway suppression check
(already_sent=True, failed=False → return None) would swallow the final
response, leaving the user staring at silence after the search.
Two changes:
1. gateway/run.py return path: skip already_sent suppression when the
final_response is "(empty)" or empty — the user needs to know the
agent finished even if streaming sent partial content earlier.
2. gateway/run.py response handler: convert the internal "(empty)"
sentinel to a user-friendly warning instead of delivering the raw
sentinel string.
Tests added for all empty/None/sentinel cases plus preserved existing
suppression behavior for normal non-empty responses.
354 lines
14 KiB
Python
354 lines
14 KiB
Python
"""Tests for duplicate reply suppression across the gateway stack.
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Covers three fix paths:
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1. base.py: stale response suppressed when interrupt_event is set and a
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pending message exists (#8221 / #2483)
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2. run.py return path: already_sent propagated from stream consumer's
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already_sent flag without requiring response_previewed (#8375)
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3. run.py queued-message path: first response correctly detected as
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already-streamed when already_sent is True without response_previewed
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"""
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import asyncio
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from types import SimpleNamespace
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from unittest.mock import AsyncMock, MagicMock, patch
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import pytest
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from gateway.config import Platform, PlatformConfig
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from gateway.platforms.base import (
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BasePlatformAdapter,
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MessageEvent,
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MessageType,
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ProcessingOutcome,
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SendResult,
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)
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from gateway.session import SessionSource, build_session_key
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# ---------------------------------------------------------------------------
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# Helpers
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# ---------------------------------------------------------------------------
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class StubAdapter(BasePlatformAdapter):
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"""Minimal concrete adapter for testing."""
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def __init__(self):
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super().__init__(PlatformConfig(enabled=True, token="fake"), Platform.DISCORD)
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self.sent = []
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async def connect(self):
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return True
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async def disconnect(self):
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pass
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async def send(self, chat_id, content, reply_to=None, metadata=None):
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self.sent.append({"chat_id": chat_id, "content": content})
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return SendResult(success=True, message_id="msg1")
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async def send_typing(self, chat_id, metadata=None):
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pass
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async def get_chat_info(self, chat_id):
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return {"id": chat_id}
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def _make_event(text="hello", chat_id="c1", user_id="u1"):
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return MessageEvent(
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text=text,
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source=SessionSource(
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platform=Platform.DISCORD,
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chat_id=chat_id,
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chat_type="dm",
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user_id=user_id,
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),
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message_id="m1",
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)
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# ===================================================================
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# Test 1: base.py — stale response suppressed on interrupt (#8221)
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# ===================================================================
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class TestBaseInterruptSuppression:
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@pytest.mark.asyncio
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async def test_stale_response_suppressed_when_interrupted(self):
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"""When interrupt_event is set AND a pending message exists,
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base.py should suppress the stale response instead of sending it."""
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adapter = StubAdapter()
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stale_response = "This is the stale answer to the first question."
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pending_response = "This is the answer to the second question."
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call_count = 0
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async def fake_handler(event):
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nonlocal call_count
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call_count += 1
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if call_count == 1:
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return stale_response
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return pending_response
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adapter.set_message_handler(fake_handler)
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event_a = _make_event(text="first question")
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session_key = build_session_key(event_a.source)
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# Simulate: message A is being processed, message B arrives
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# The interrupt event is set and B is in pending_messages
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interrupt_event = asyncio.Event()
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interrupt_event.set()
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adapter._active_sessions[session_key] = interrupt_event
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event_b = _make_event(text="second question")
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adapter._pending_messages[session_key] = event_b
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await adapter._process_message_background(event_a, session_key)
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# The stale response should NOT have been sent.
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stale_sends = [s for s in adapter.sent if s["content"] == stale_response]
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assert len(stale_sends) == 0, (
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f"Stale response was sent {len(stale_sends)} time(s) — should be suppressed"
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)
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# The pending message's response SHOULD have been sent.
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pending_sends = [s for s in adapter.sent if s["content"] == pending_response]
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assert len(pending_sends) == 1, "Pending message response should be sent"
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@pytest.mark.asyncio
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async def test_response_not_suppressed_without_interrupt(self):
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"""Normal case: no interrupt, response should be sent."""
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adapter = StubAdapter()
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async def fake_handler(event):
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return "Normal response"
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adapter.set_message_handler(fake_handler)
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event = _make_event()
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session_key = build_session_key(event.source)
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await adapter._process_message_background(event, session_key)
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assert any(s["content"] == "Normal response" for s in adapter.sent)
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@pytest.mark.asyncio
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async def test_response_not_suppressed_with_interrupt_but_no_pending(self):
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"""Interrupt event set but no pending message (race already resolved) —
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response should still be sent."""
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adapter = StubAdapter()
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async def fake_handler(event):
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return "Valid response"
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adapter.set_message_handler(fake_handler)
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event = _make_event()
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session_key = build_session_key(event.source)
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# Set interrupt but no pending message
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interrupt_event = asyncio.Event()
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interrupt_event.set()
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adapter._active_sessions[session_key] = interrupt_event
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await adapter._process_message_background(event, session_key)
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assert any(s["content"] == "Valid response" for s in adapter.sent)
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# ===================================================================
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# Test 2: run.py — already_sent without response_previewed (#8375)
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# ===================================================================
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class TestAlreadySentWithoutResponsePreviewed:
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"""The already_sent flag on the response dict should be set when the
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stream consumer's already_sent is True, even if response_previewed is
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False. This prevents duplicate sends when streaming was interrupted
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by flood control."""
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def _make_mock_stream_consumer(self, already_sent=False, final_response_sent=False):
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sc = SimpleNamespace(
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already_sent=already_sent,
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final_response_sent=final_response_sent,
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)
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return sc
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def test_already_sent_set_without_response_previewed(self):
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"""Stream consumer already_sent=True should propagate to response
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dict even when response_previewed is False."""
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sc = self._make_mock_stream_consumer(already_sent=True, final_response_sent=False)
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response = {"final_response": "text", "response_previewed": False}
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# Reproduce the logic from run.py return path (post-fix)
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if sc and isinstance(response, dict) and not response.get("failed"):
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if (
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getattr(sc, "final_response_sent", False)
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or getattr(sc, "already_sent", False)
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):
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response["already_sent"] = True
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assert response.get("already_sent") is True
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def test_already_sent_not_set_when_nothing_sent(self):
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"""When stream consumer hasn't sent anything, already_sent should
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not be set on the response."""
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sc = self._make_mock_stream_consumer(already_sent=False, final_response_sent=False)
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response = {"final_response": "text", "response_previewed": False}
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if sc and isinstance(response, dict) and not response.get("failed"):
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if (
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getattr(sc, "final_response_sent", False)
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or getattr(sc, "already_sent", False)
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):
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response["already_sent"] = True
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assert "already_sent" not in response
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def test_already_sent_set_on_final_response_sent(self):
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"""final_response_sent=True should still work as before."""
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sc = self._make_mock_stream_consumer(already_sent=False, final_response_sent=True)
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response = {"final_response": "text"}
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if sc and isinstance(response, dict) and not response.get("failed"):
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if (
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getattr(sc, "final_response_sent", False)
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or getattr(sc, "already_sent", False)
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):
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response["already_sent"] = True
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assert response.get("already_sent") is True
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def test_already_sent_not_set_on_failed_response(self):
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"""Failed responses should never be suppressed — user needs to see
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the error message even if streaming sent earlier partial output."""
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sc = self._make_mock_stream_consumer(already_sent=True, final_response_sent=False)
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response = {"final_response": "Error: something broke", "failed": True}
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if sc and isinstance(response, dict) and not response.get("failed"):
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if (
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getattr(sc, "final_response_sent", False)
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or getattr(sc, "already_sent", False)
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):
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response["already_sent"] = True
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assert "already_sent" not in response
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# ===================================================================
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# Test 2b: run.py — empty response never suppressed (#10xxx)
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# ===================================================================
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class TestEmptyResponseNotSuppressed:
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"""When the model returns '(empty)' after tool calls (e.g. mimo-v2-pro
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going silent after web_search), the gateway must NOT suppress delivery
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even if the stream consumer sent intermediate text earlier.
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Without this fix, the user sees partial streaming text ('Let me search
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for that') and then silence — the '(empty)' sentinel is swallowed by
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already_sent=True."""
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def _make_mock_stream_consumer(self, already_sent=False, final_response_sent=False):
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return SimpleNamespace(
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already_sent=already_sent,
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final_response_sent=final_response_sent,
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)
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def _apply_suppression_logic(self, response, sc):
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"""Reproduce the fixed logic from gateway/run.py return path."""
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if sc and isinstance(response, dict) and not response.get("failed"):
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_final = response.get("final_response") or ""
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_is_empty_sentinel = not _final or _final == "(empty)"
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if not _is_empty_sentinel and (
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getattr(sc, "final_response_sent", False)
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or getattr(sc, "already_sent", False)
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):
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response["already_sent"] = True
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def test_empty_sentinel_not_suppressed_with_already_sent(self):
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"""'(empty)' final_response should NOT be suppressed even when
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streaming sent intermediate content."""
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sc = self._make_mock_stream_consumer(already_sent=True, final_response_sent=True)
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response = {"final_response": "(empty)"}
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self._apply_suppression_logic(response, sc)
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assert "already_sent" not in response
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def test_empty_string_not_suppressed_with_already_sent(self):
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"""Empty string final_response should NOT be suppressed."""
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sc = self._make_mock_stream_consumer(already_sent=True, final_response_sent=True)
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response = {"final_response": ""}
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self._apply_suppression_logic(response, sc)
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assert "already_sent" not in response
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def test_none_response_not_suppressed_with_already_sent(self):
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"""None final_response should NOT be suppressed."""
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sc = self._make_mock_stream_consumer(already_sent=True, final_response_sent=True)
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response = {"final_response": None}
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self._apply_suppression_logic(response, sc)
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assert "already_sent" not in response
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def test_real_response_still_suppressed_with_already_sent(self):
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"""Normal non-empty response should still be suppressed when
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streaming delivered content."""
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sc = self._make_mock_stream_consumer(already_sent=True, final_response_sent=False)
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response = {"final_response": "Here are the search results..."}
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self._apply_suppression_logic(response, sc)
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assert response.get("already_sent") is True
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def test_failed_empty_response_never_suppressed(self):
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"""Failed responses are never suppressed regardless of content."""
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sc = self._make_mock_stream_consumer(already_sent=True, final_response_sent=True)
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response = {"final_response": "(empty)", "failed": True}
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self._apply_suppression_logic(response, sc)
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assert "already_sent" not in response
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class TestQueuedMessageAlreadyStreamed:
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"""The queued-message path should detect that the first response was
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already streamed (already_sent=True) even without response_previewed."""
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def _make_mock_sc(self, already_sent=False, final_response_sent=False):
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return SimpleNamespace(
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already_sent=already_sent,
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final_response_sent=final_response_sent,
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)
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def test_queued_path_detects_already_streamed(self):
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"""already_sent=True on stream consumer means first response was
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streamed — skip re-sending before processing queued message."""
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_sc = self._make_mock_sc(already_sent=True)
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# Reproduce the queued-message logic from run.py (post-fix)
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_already_streamed = bool(
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_sc
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and (
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getattr(_sc, "final_response_sent", False)
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or getattr(_sc, "already_sent", False)
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)
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)
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assert _already_streamed is True
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def test_queued_path_sends_when_not_streamed(self):
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"""Nothing was streamed — first response should be sent before
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processing the queued message."""
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_sc = self._make_mock_sc(already_sent=False)
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_already_streamed = bool(
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_sc
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and (
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getattr(_sc, "final_response_sent", False)
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or getattr(_sc, "already_sent", False)
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)
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)
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assert _already_streamed is False
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def test_queued_path_with_no_stream_consumer(self):
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"""No stream consumer at all (streaming disabled) — not streamed."""
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_sc = None
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_already_streamed = bool(
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_sc
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and (
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getattr(_sc, "final_response_sent", False)
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or getattr(_sc, "already_sent", False)
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)
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)
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assert _already_streamed is False
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