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hermes-agent/tests/gateway/test_api_server.py
Teknium b2a6b012fe fix(api_server): streaming breaks when agent makes tool calls (#2985) 
* fix(run_agent): ensure _fire_first_delta() is called for tool generation events

Added calls to _fire_first_delta() in the AIAgent class to improve the handling of tool generation events, ensuring timely notifications during the processing of function calls and tool usage.

* fix(run_agent): improve timeout handling for chat completions

Enhanced the timeout configuration for chat completions in the AIAgent class by introducing customizable connection, read, and write timeouts using environment variables. This ensures more robust handling of API requests during streaming operations.

* fix(run_agent): reduce default stream read timeout for chat completions

Updated the default stream read timeout from 120 seconds to 60 seconds in the AIAgent class, enhancing the timeout configuration for chat completions. This change aims to improve responsiveness during streaming operations.

* fix(run_agent): enhance streaming error handling and retry logic

Improved the error handling and retry mechanism for streaming requests in the AIAgent class. Introduced a configurable maximum number of stream retries and refined the handling of transient network errors, allowing for retries with fresh connections. Non-transient errors now trigger a fallback to non-streaming only when appropriate, ensuring better resilience during API interactions.

* fix(api_server): streaming breaks when agent makes tool calls

The agent fires stream_delta_callback(None) to signal the CLI display
to close its response box before tool execution begins. The API server's
_on_delta callback was forwarding this None directly into the SSE queue,
where the SSE writer treats it as end-of-stream and terminates the HTTP
response prematurely.

After tool calls complete, the agent streams the final answer through
the same callback, but the SSE response was already closed — so Open
WebUI (and similar frontends) never received the actual answer.

Fix: filter out None in _on_delta so the SSE stream stays open. The SSE
loop already detects completion via agent_task.done(), which handles
stream termination correctly without needing the None sentinel.

Reported by Rohit Paul on X.
2026-03-25 09:56:20 -07:00

1440 lines
59 KiB
Python
Raw Blame History

"""
Tests for the OpenAI-compatible API server gateway adapter.
Tests cover:
- Chat Completions endpoint (request parsing, response format)
- Responses API endpoint (request parsing, response format)
- previous_response_id chaining (store/retrieve)
- Auth (valid key, invalid key, no key configured)
- /v1/models endpoint
- /health endpoint
- System prompt extraction
- Error handling (invalid JSON, missing fields)
"""
import json
import time
import uuid
from unittest.mock import AsyncMock, MagicMock, patch
import pytest
from aiohttp import web
from aiohttp.test_utils import AioHTTPTestCase, TestClient, TestServer
from gateway.config import GatewayConfig, Platform, PlatformConfig
from gateway.platforms.api_server import (
APIServerAdapter,
ResponseStore,
_CORS_HEADERS,
check_api_server_requirements,
cors_middleware,
)
# ---------------------------------------------------------------------------
# check_api_server_requirements
# ---------------------------------------------------------------------------
class TestCheckRequirements:
def test_returns_true_when_aiohttp_available(self):
assert check_api_server_requirements() is True
@patch("gateway.platforms.api_server.AIOHTTP_AVAILABLE", False)
def test_returns_false_without_aiohttp(self):
assert check_api_server_requirements() is False
# ---------------------------------------------------------------------------
# ResponseStore
# ---------------------------------------------------------------------------
class TestResponseStore:
def test_put_and_get(self):
store = ResponseStore(max_size=10)
store.put("resp_1", {"output": "hello"})
assert store.get("resp_1") == {"output": "hello"}
def test_get_missing_returns_none(self):
store = ResponseStore(max_size=10)
assert store.get("resp_missing") is None
def test_lru_eviction(self):
store = ResponseStore(max_size=3)
store.put("resp_1", {"output": "one"})
store.put("resp_2", {"output": "two"})
store.put("resp_3", {"output": "three"})
# Adding a 4th should evict resp_1
store.put("resp_4", {"output": "four"})
assert store.get("resp_1") is None
assert store.get("resp_2") is not None
assert len(store) == 3
def test_access_refreshes_lru(self):
store = ResponseStore(max_size=3)
store.put("resp_1", {"output": "one"})
store.put("resp_2", {"output": "two"})
store.put("resp_3", {"output": "three"})
# Access resp_1 to move it to end
store.get("resp_1")
# Now resp_2 is the oldest — adding a 4th should evict resp_2
store.put("resp_4", {"output": "four"})
assert store.get("resp_2") is None
assert store.get("resp_1") is not None
def test_update_existing_key(self):
store = ResponseStore(max_size=10)
store.put("resp_1", {"output": "v1"})
store.put("resp_1", {"output": "v2"})
assert store.get("resp_1") == {"output": "v2"}
assert len(store) == 1
def test_delete_existing(self):
store = ResponseStore(max_size=10)
store.put("resp_1", {"output": "hello"})
assert store.delete("resp_1") is True
assert store.get("resp_1") is None
assert len(store) == 0
def test_delete_missing(self):
store = ResponseStore(max_size=10)
assert store.delete("resp_missing") is False
# ---------------------------------------------------------------------------
# Adapter initialization
# ---------------------------------------------------------------------------
class TestAdapterInit:
def test_default_config(self):
config = PlatformConfig(enabled=True)
adapter = APIServerAdapter(config)
assert adapter._host == "127.0.0.1"
assert adapter._port == 8642
assert adapter._api_key == ""
assert adapter.platform == Platform.API_SERVER
def test_custom_config_from_extra(self):
config = PlatformConfig(
enabled=True,
extra={
"host": "0.0.0.0",
"port": 9999,
"key": "sk-test",
"cors_origins": ["http://localhost:3000"],
},
)
adapter = APIServerAdapter(config)
assert adapter._host == "0.0.0.0"
assert adapter._port == 9999
assert adapter._api_key == "sk-test"
assert adapter._cors_origins == ("http://localhost:3000",)
def test_config_from_env(self, monkeypatch):
monkeypatch.setenv("API_SERVER_HOST", "10.0.0.1")
monkeypatch.setenv("API_SERVER_PORT", "7777")
monkeypatch.setenv("API_SERVER_KEY", "sk-env")
monkeypatch.setenv("API_SERVER_CORS_ORIGINS", "http://localhost:3000, http://127.0.0.1:3000")
config = PlatformConfig(enabled=True)
adapter = APIServerAdapter(config)
assert adapter._host == "10.0.0.1"
assert adapter._port == 7777
assert adapter._api_key == "sk-env"
assert adapter._cors_origins == (
"http://localhost:3000",
"http://127.0.0.1:3000",
)
# ---------------------------------------------------------------------------
# Auth checking
# ---------------------------------------------------------------------------
class TestAuth:
def test_no_key_configured_allows_all(self):
config = PlatformConfig(enabled=True)
adapter = APIServerAdapter(config)
mock_request = MagicMock()
mock_request.headers = {}
assert adapter._check_auth(mock_request) is None
def test_valid_key_passes(self):
config = PlatformConfig(enabled=True, extra={"key": "sk-test123"})
adapter = APIServerAdapter(config)
mock_request = MagicMock()
mock_request.headers = {"Authorization": "Bearer sk-test123"}
assert adapter._check_auth(mock_request) is None
def test_invalid_key_returns_401(self):
config = PlatformConfig(enabled=True, extra={"key": "sk-test123"})
adapter = APIServerAdapter(config)
mock_request = MagicMock()
mock_request.headers = {"Authorization": "Bearer wrong-key"}
result = adapter._check_auth(mock_request)
assert result is not None
assert result.status == 401
def test_missing_auth_header_returns_401(self):
config = PlatformConfig(enabled=True, extra={"key": "sk-test123"})
adapter = APIServerAdapter(config)
mock_request = MagicMock()
mock_request.headers = {}
result = adapter._check_auth(mock_request)
assert result is not None
assert result.status == 401
def test_malformed_auth_header_returns_401(self):
config = PlatformConfig(enabled=True, extra={"key": "sk-test123"})
adapter = APIServerAdapter(config)
mock_request = MagicMock()
mock_request.headers = {"Authorization": "Basic dXNlcjpwYXNz"}
result = adapter._check_auth(mock_request)
assert result is not None
assert result.status == 401
# ---------------------------------------------------------------------------
# Helpers for HTTP tests
# ---------------------------------------------------------------------------
def _make_adapter(api_key: str = "", cors_origins=None) -> APIServerAdapter:
"""Create an adapter with optional API key."""
extra = {}
if api_key:
extra["key"] = api_key
if cors_origins is not None:
extra["cors_origins"] = cors_origins
config = PlatformConfig(enabled=True, extra=extra)
return APIServerAdapter(config)
def _create_app(adapter: APIServerAdapter) -> web.Application:
"""Create the aiohttp app from the adapter (without starting the full server)."""
app = web.Application(middlewares=[cors_middleware])
app["api_server_adapter"] = adapter
app.router.add_get("/health", adapter._handle_health)
app.router.add_get("/v1/models", adapter._handle_models)
app.router.add_post("/v1/chat/completions", adapter._handle_chat_completions)
app.router.add_post("/v1/responses", adapter._handle_responses)
app.router.add_get("/v1/responses/{response_id}", adapter._handle_get_response)
app.router.add_delete("/v1/responses/{response_id}", adapter._handle_delete_response)
return app
@pytest.fixture
def adapter():
return _make_adapter()
@pytest.fixture
def auth_adapter():
return _make_adapter(api_key="sk-secret")
# ---------------------------------------------------------------------------
# /health endpoint
# ---------------------------------------------------------------------------
class TestHealthEndpoint:
@pytest.mark.asyncio
async def test_health_returns_ok(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/health")
assert resp.status == 200
data = await resp.json()
assert data["status"] == "ok"
assert data["platform"] == "hermes-agent"
# ---------------------------------------------------------------------------
# /v1/models endpoint
# ---------------------------------------------------------------------------
class TestModelsEndpoint:
@pytest.mark.asyncio
async def test_models_returns_hermes_agent(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/v1/models")
assert resp.status == 200
data = await resp.json()
assert data["object"] == "list"
assert len(data["data"]) == 1
assert data["data"][0]["id"] == "hermes-agent"
assert data["data"][0]["owned_by"] == "hermes"
@pytest.mark.asyncio
async def test_models_requires_auth(self, auth_adapter):
app = _create_app(auth_adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/v1/models")
assert resp.status == 401
@pytest.mark.asyncio
async def test_models_with_valid_auth(self, auth_adapter):
app = _create_app(auth_adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get(
"/v1/models",
headers={"Authorization": "Bearer sk-secret"},
)
assert resp.status == 200
# ---------------------------------------------------------------------------
# /v1/chat/completions endpoint
# ---------------------------------------------------------------------------
class TestChatCompletionsEndpoint:
@pytest.mark.asyncio
async def test_invalid_json_returns_400(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post(
"/v1/chat/completions",
data="not json",
headers={"Content-Type": "application/json"},
)
assert resp.status == 400
data = await resp.json()
assert "Invalid JSON" in data["error"]["message"]
@pytest.mark.asyncio
async def test_missing_messages_returns_400(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post("/v1/chat/completions", json={"model": "test"})
assert resp.status == 400
data = await resp.json()
assert "messages" in data["error"]["message"]
@pytest.mark.asyncio
async def test_empty_messages_returns_400(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post("/v1/chat/completions", json={"model": "test", "messages": []})
assert resp.status == 400
@pytest.mark.asyncio
async def test_stream_true_returns_sse(self, adapter):
"""stream=true returns SSE format with the full response."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
async def _mock_run_agent(**kwargs):
# Simulate streaming: invoke stream_delta_callback with tokens
cb = kwargs.get("stream_delta_callback")
if cb:
cb("Hello!")
cb(None) # End signal
return (
{"final_response": "Hello!", "messages": [], "api_calls": 1},
{"input_tokens": 10, "output_tokens": 5, "total_tokens": 15},
)
with patch.object(adapter, "_run_agent", side_effect=_mock_run_agent) as mock_run:
resp = await cli.post(
"/v1/chat/completions",
json={
"model": "test",
"messages": [{"role": "user", "content": "hi"}],
"stream": True,
},
)
assert resp.status == 200
assert "text/event-stream" in resp.headers.get("Content-Type", "")
body = await resp.text()
assert "data: " in body
assert "[DONE]" in body
assert "Hello!" in body
@pytest.mark.asyncio
async def test_stream_survives_tool_call_none_sentinel(self, adapter):
"""stream_delta_callback(None) mid-stream (tool calls) must NOT kill the SSE stream.
The agent fires stream_delta_callback(None) to tell the CLI display to
close its response box before executing tool calls. The API server's
_on_delta must filter this out so the SSE response stays open and the
final answer (streamed after tool execution) reaches the client.
"""
import asyncio
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
async def _mock_run_agent(**kwargs):
cb = kwargs.get("stream_delta_callback")
if cb:
# Simulate: agent streams partial text, then fires None
# (tool call box-close signal), then streams the final answer
cb("Thinking")
cb(None) # mid-stream None from tool calls
await asyncio.sleep(0.05) # simulate tool execution delay
cb(" about it...")
cb(None) # another None (possible second tool round)
await asyncio.sleep(0.05)
cb(" The answer is 42.")
return (
{"final_response": "Thinking about it... The answer is 42.", "messages": [], "api_calls": 3},
{"input_tokens": 20, "output_tokens": 15, "total_tokens": 35},
)
with patch.object(adapter, "_run_agent", side_effect=_mock_run_agent):
resp = await cli.post(
"/v1/chat/completions",
json={
"model": "test",
"messages": [{"role": "user", "content": "What is the answer?"}],
"stream": True,
},
)
assert resp.status == 200
body = await resp.text()
assert "[DONE]" in body
# The final answer text must appear in the SSE stream
assert "The answer is 42." in body
# All partial text must be present too
assert "Thinking" in body
assert " about it..." in body
@pytest.mark.asyncio
async def test_no_user_message_returns_400(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post(
"/v1/chat/completions",
json={
"model": "test",
"messages": [{"role": "system", "content": "You are helpful."}],
},
)
assert resp.status == 400
@pytest.mark.asyncio
async def test_successful_completion(self, adapter):
"""Test a successful chat completion with mocked agent."""
mock_result = {
"final_response": "Hello! How can I help you today?",
"messages": [],
"api_calls": 1,
}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/chat/completions",
json={
"model": "hermes-agent",
"messages": [{"role": "user", "content": "Hello"}],
},
)
assert resp.status == 200
data = await resp.json()
assert data["object"] == "chat.completion"
assert data["id"].startswith("chatcmpl-")
assert data["model"] == "hermes-agent"
assert len(data["choices"]) == 1
assert data["choices"][0]["message"]["role"] == "assistant"
assert data["choices"][0]["message"]["content"] == "Hello! How can I help you today?"
assert data["choices"][0]["finish_reason"] == "stop"
assert "usage" in data
@pytest.mark.asyncio
async def test_system_prompt_extracted(self, adapter):
"""System messages from the client are passed as ephemeral_system_prompt."""
mock_result = {
"final_response": "I am a pirate! Arrr!",
"messages": [],
"api_calls": 1,
}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/chat/completions",
json={
"model": "hermes-agent",
"messages": [
{"role": "system", "content": "You are a pirate."},
{"role": "user", "content": "Hello"},
],
},
)
assert resp.status == 200
# Check that _run_agent was called with the system prompt
call_kwargs = mock_run.call_args
assert call_kwargs.kwargs.get("ephemeral_system_prompt") == "You are a pirate."
assert call_kwargs.kwargs.get("user_message") == "Hello"
@pytest.mark.asyncio
async def test_conversation_history_passed(self, adapter):
"""Previous user/assistant messages become conversation_history."""
mock_result = {"final_response": "3", "messages": [], "api_calls": 1}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/chat/completions",
json={
"model": "hermes-agent",
"messages": [
{"role": "user", "content": "1+1=?"},
{"role": "assistant", "content": "2"},
{"role": "user", "content": "Now add 1 more"},
],
},
)
assert resp.status == 200
call_kwargs = mock_run.call_args.kwargs
assert call_kwargs["user_message"] == "Now add 1 more"
assert len(call_kwargs["conversation_history"]) == 2
assert call_kwargs["conversation_history"][0] == {"role": "user", "content": "1+1=?"}
assert call_kwargs["conversation_history"][1] == {"role": "assistant", "content": "2"}
@pytest.mark.asyncio
async def test_agent_error_returns_500(self, adapter):
"""Agent exception returns 500."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.side_effect = RuntimeError("Provider failed")
resp = await cli.post(
"/v1/chat/completions",
json={
"model": "hermes-agent",
"messages": [{"role": "user", "content": "Hello"}],
},
)
assert resp.status == 500
data = await resp.json()
assert "Provider failed" in data["error"]["message"]
# ---------------------------------------------------------------------------
# /v1/responses endpoint
# ---------------------------------------------------------------------------
class TestResponsesEndpoint:
@pytest.mark.asyncio
async def test_missing_input_returns_400(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post("/v1/responses", json={"model": "test"})
assert resp.status == 400
data = await resp.json()
assert "input" in data["error"]["message"]
@pytest.mark.asyncio
async def test_invalid_json_returns_400(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post(
"/v1/responses",
data="not json",
headers={"Content-Type": "application/json"},
)
assert resp.status == 400
@pytest.mark.asyncio
async def test_successful_response_with_string_input(self, adapter):
"""String input is wrapped in a user message."""
mock_result = {
"final_response": "Paris is the capital of France.",
"messages": [],
"api_calls": 1,
}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": "What is the capital of France?",
},
)
assert resp.status == 200
data = await resp.json()
assert data["object"] == "response"
assert data["id"].startswith("resp_")
assert data["status"] == "completed"
assert len(data["output"]) == 1
assert data["output"][0]["type"] == "message"
assert data["output"][0]["content"][0]["type"] == "output_text"
assert data["output"][0]["content"][0]["text"] == "Paris is the capital of France."
@pytest.mark.asyncio
async def test_successful_response_with_array_input(self, adapter):
"""Array input with role/content objects."""
mock_result = {"final_response": "Done", "messages": [], "api_calls": 1}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": [
{"role": "user", "content": "Hello"},
{"role": "user", "content": "What is 2+2?"},
],
},
)
assert resp.status == 200
call_kwargs = mock_run.call_args.kwargs
# Last message is user_message, rest are history
assert call_kwargs["user_message"] == "What is 2+2?"
assert len(call_kwargs["conversation_history"]) == 1
@pytest.mark.asyncio
async def test_instructions_as_ephemeral_prompt(self, adapter):
"""The instructions field maps to ephemeral_system_prompt."""
mock_result = {"final_response": "Ahoy!", "messages": [], "api_calls": 1}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": "Hello",
"instructions": "Talk like a pirate.",
},
)
assert resp.status == 200
call_kwargs = mock_run.call_args.kwargs
assert call_kwargs["ephemeral_system_prompt"] == "Talk like a pirate."
@pytest.mark.asyncio
async def test_previous_response_id_chaining(self, adapter):
"""Test that responses can be chained via previous_response_id."""
mock_result_1 = {
"final_response": "2",
"messages": [{"role": "assistant", "content": "2"}],
"api_calls": 1,
}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
# First request
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result_1, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp1 = await cli.post(
"/v1/responses",
json={"model": "hermes-agent", "input": "What is 1+1?"},
)
assert resp1.status == 200
data1 = await resp1.json()
response_id = data1["id"]
# Second request chaining from the first
mock_result_2 = {
"final_response": "3",
"messages": [{"role": "assistant", "content": "3"}],
"api_calls": 1,
}
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result_2, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp2 = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": "Now add 1 more",
"previous_response_id": response_id,
},
)
assert resp2.status == 200
# The conversation_history should contain the full history from the first response
call_kwargs = mock_run.call_args.kwargs
assert len(call_kwargs["conversation_history"]) > 0
assert call_kwargs["user_message"] == "Now add 1 more"
@pytest.mark.asyncio
async def test_invalid_previous_response_id_returns_404(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": "follow up",
"previous_response_id": "resp_nonexistent",
},
)
assert resp.status == 404
@pytest.mark.asyncio
async def test_store_false_does_not_store(self, adapter):
"""When store=false, the response is NOT stored."""
mock_result = {"final_response": "OK", "messages": [], "api_calls": 1}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": "Hello",
"store": False,
},
)
assert resp.status == 200
data = await resp.json()
# The response has an ID but it shouldn't be retrievable
assert adapter._response_store.get(data["id"]) is None
@pytest.mark.asyncio
async def test_instructions_inherited_from_previous(self, adapter):
"""If no instructions provided, carry forward from previous response."""
mock_result = {"final_response": "Ahoy!", "messages": [], "api_calls": 1}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
# First request with instructions
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp1 = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": "Hello",
"instructions": "Be a pirate",
},
)
data1 = await resp1.json()
resp_id = data1["id"]
# Second request without instructions
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp2 = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": "Tell me more",
"previous_response_id": resp_id,
},
)
assert resp2.status == 200
call_kwargs = mock_run.call_args.kwargs
assert call_kwargs["ephemeral_system_prompt"] == "Be a pirate"
@pytest.mark.asyncio
async def test_agent_error_returns_500(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.side_effect = RuntimeError("Boom")
resp = await cli.post(
"/v1/responses",
json={"model": "hermes-agent", "input": "Hello"},
)
assert resp.status == 500
@pytest.mark.asyncio
async def test_invalid_input_type_returns_400(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post(
"/v1/responses",
json={"model": "hermes-agent", "input": 42},
)
assert resp.status == 400
# ---------------------------------------------------------------------------
# Auth on endpoints
# ---------------------------------------------------------------------------
class TestEndpointAuth:
@pytest.mark.asyncio
async def test_chat_completions_requires_auth(self, auth_adapter):
app = _create_app(auth_adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post(
"/v1/chat/completions",
json={"model": "test", "messages": [{"role": "user", "content": "hi"}]},
)
assert resp.status == 401
@pytest.mark.asyncio
async def test_responses_requires_auth(self, auth_adapter):
app = _create_app(auth_adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post(
"/v1/responses",
json={"model": "test", "input": "hi"},
)
assert resp.status == 401
@pytest.mark.asyncio
async def test_models_requires_auth(self, auth_adapter):
app = _create_app(auth_adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/v1/models")
assert resp.status == 401
@pytest.mark.asyncio
async def test_health_does_not_require_auth(self, auth_adapter):
app = _create_app(auth_adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/health")
assert resp.status == 200
# ---------------------------------------------------------------------------
# Config integration
# ---------------------------------------------------------------------------
class TestConfigIntegration:
def test_platform_enum_has_api_server(self):
assert Platform.API_SERVER.value == "api_server"
def test_env_override_enables_api_server(self, monkeypatch):
monkeypatch.setenv("API_SERVER_ENABLED", "true")
from gateway.config import load_gateway_config
config = load_gateway_config()
assert Platform.API_SERVER in config.platforms
assert config.platforms[Platform.API_SERVER].enabled is True
def test_env_override_with_key(self, monkeypatch):
monkeypatch.setenv("API_SERVER_KEY", "sk-mykey")
from gateway.config import load_gateway_config
config = load_gateway_config()
assert Platform.API_SERVER in config.platforms
assert config.platforms[Platform.API_SERVER].extra.get("key") == "sk-mykey"
def test_env_override_port_and_host(self, monkeypatch):
monkeypatch.setenv("API_SERVER_ENABLED", "true")
monkeypatch.setenv("API_SERVER_PORT", "9999")
monkeypatch.setenv("API_SERVER_HOST", "0.0.0.0")
from gateway.config import load_gateway_config
config = load_gateway_config()
assert config.platforms[Platform.API_SERVER].extra.get("port") == 9999
assert config.platforms[Platform.API_SERVER].extra.get("host") == "0.0.0.0"
def test_env_override_cors_origins(self, monkeypatch):
monkeypatch.setenv("API_SERVER_ENABLED", "true")
monkeypatch.setenv(
"API_SERVER_CORS_ORIGINS",
"http://localhost:3000, http://127.0.0.1:3000",
)
from gateway.config import load_gateway_config
config = load_gateway_config()
assert config.platforms[Platform.API_SERVER].extra.get("cors_origins") == [
"http://localhost:3000",
"http://127.0.0.1:3000",
]
def test_api_server_in_connected_platforms(self):
config = GatewayConfig()
config.platforms[Platform.API_SERVER] = PlatformConfig(enabled=True)
connected = config.get_connected_platforms()
assert Platform.API_SERVER in connected
def test_api_server_not_in_connected_when_disabled(self):
config = GatewayConfig()
config.platforms[Platform.API_SERVER] = PlatformConfig(enabled=False)
connected = config.get_connected_platforms()
assert Platform.API_SERVER not in connected
# ---------------------------------------------------------------------------
# Multiple system messages
# ---------------------------------------------------------------------------
class TestMultipleSystemMessages:
@pytest.mark.asyncio
async def test_multiple_system_messages_concatenated(self, adapter):
mock_result = {"final_response": "OK", "messages": [], "api_calls": 1}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/chat/completions",
json={
"model": "hermes-agent",
"messages": [
{"role": "system", "content": "You are helpful."},
{"role": "system", "content": "Be concise."},
{"role": "user", "content": "Hello"},
],
},
)
assert resp.status == 200
call_kwargs = mock_run.call_args.kwargs
prompt = call_kwargs["ephemeral_system_prompt"]
assert "You are helpful." in prompt
assert "Be concise." in prompt
# ---------------------------------------------------------------------------
# send() method (not used but required by base)
# ---------------------------------------------------------------------------
class TestSendMethod:
@pytest.mark.asyncio
async def test_send_returns_not_supported(self):
config = PlatformConfig(enabled=True)
adapter = APIServerAdapter(config)
result = await adapter.send("chat1", "hello")
assert result.success is False
assert "HTTP request/response" in result.error
# ---------------------------------------------------------------------------
# GET /v1/responses/{response_id}
# ---------------------------------------------------------------------------
class TestGetResponse:
@pytest.mark.asyncio
async def test_get_stored_response(self, adapter):
"""GET returns a previously stored response."""
mock_result = {"final_response": "Hello!", "messages": [], "api_calls": 1}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
# Create a response first
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 10, "output_tokens": 5, "total_tokens": 15})
resp = await cli.post(
"/v1/responses",
json={"model": "hermes-agent", "input": "Hi"},
)
assert resp.status == 200
data = await resp.json()
response_id = data["id"]
# Now GET it
resp2 = await cli.get(f"/v1/responses/{response_id}")
assert resp2.status == 200
data2 = await resp2.json()
assert data2["id"] == response_id
assert data2["object"] == "response"
assert data2["status"] == "completed"
@pytest.mark.asyncio
async def test_get_not_found(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/v1/responses/resp_nonexistent")
assert resp.status == 404
@pytest.mark.asyncio
async def test_get_requires_auth(self, auth_adapter):
app = _create_app(auth_adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/v1/responses/resp_any")
assert resp.status == 401
# ---------------------------------------------------------------------------
# DELETE /v1/responses/{response_id}
# ---------------------------------------------------------------------------
class TestDeleteResponse:
@pytest.mark.asyncio
async def test_delete_stored_response(self, adapter):
"""DELETE removes a stored response and returns confirmation."""
mock_result = {"final_response": "Hello!", "messages": [], "api_calls": 1}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/responses",
json={"model": "hermes-agent", "input": "Hi"},
)
data = await resp.json()
response_id = data["id"]
# Delete it
resp2 = await cli.delete(f"/v1/responses/{response_id}")
assert resp2.status == 200
data2 = await resp2.json()
assert data2["id"] == response_id
assert data2["object"] == "response"
assert data2["deleted"] is True
# Verify it's gone
resp3 = await cli.get(f"/v1/responses/{response_id}")
assert resp3.status == 404
@pytest.mark.asyncio
async def test_delete_not_found(self, adapter):
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.delete("/v1/responses/resp_nonexistent")
assert resp.status == 404
@pytest.mark.asyncio
async def test_delete_requires_auth(self, auth_adapter):
app = _create_app(auth_adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.delete("/v1/responses/resp_any")
assert resp.status == 401
# ---------------------------------------------------------------------------
# Tool calls in output
# ---------------------------------------------------------------------------
class TestToolCallsInOutput:
@pytest.mark.asyncio
async def test_tool_calls_in_output(self, adapter):
"""When agent returns tool calls, they appear as function_call items."""
mock_result = {
"final_response": "The result is 42.",
"messages": [
{
"role": "assistant",
"content": None,
"tool_calls": [
{
"id": "call_abc123",
"function": {
"name": "calculator",
"arguments": '{"expression": "6*7"}',
},
}
],
},
{
"role": "tool",
"tool_call_id": "call_abc123",
"content": "42",
},
{
"role": "assistant",
"content": "The result is 42.",
},
],
"api_calls": 2,
}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/responses",
json={"model": "hermes-agent", "input": "What is 6*7?"},
)
assert resp.status == 200
data = await resp.json()
output = data["output"]
# Should have: function_call, function_call_output, message
assert len(output) == 3
assert output[0]["type"] == "function_call"
assert output[0]["name"] == "calculator"
assert output[0]["arguments"] == '{"expression": "6*7"}'
assert output[0]["call_id"] == "call_abc123"
assert output[1]["type"] == "function_call_output"
assert output[1]["call_id"] == "call_abc123"
assert output[1]["output"] == "42"
assert output[2]["type"] == "message"
assert output[2]["content"][0]["text"] == "The result is 42."
@pytest.mark.asyncio
async def test_no_tool_calls_still_works(self, adapter):
"""Without tool calls, output is just a message."""
mock_result = {"final_response": "Hello!", "messages": [], "api_calls": 1}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/responses",
json={"model": "hermes-agent", "input": "Hello"},
)
assert resp.status == 200
data = await resp.json()
assert len(data["output"]) == 1
assert data["output"][0]["type"] == "message"
# ---------------------------------------------------------------------------
# Usage / token counting
# ---------------------------------------------------------------------------
class TestUsageCounting:
@pytest.mark.asyncio
async def test_responses_usage(self, adapter):
"""Responses API returns real token counts."""
mock_result = {"final_response": "Done", "messages": [], "api_calls": 1}
usage = {"input_tokens": 100, "output_tokens": 50, "total_tokens": 150}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, usage)
resp = await cli.post(
"/v1/responses",
json={"model": "hermes-agent", "input": "Hi"},
)
assert resp.status == 200
data = await resp.json()
assert data["usage"]["input_tokens"] == 100
assert data["usage"]["output_tokens"] == 50
assert data["usage"]["total_tokens"] == 150
@pytest.mark.asyncio
async def test_chat_completions_usage(self, adapter):
"""Chat completions returns real token counts."""
mock_result = {"final_response": "Done", "messages": [], "api_calls": 1}
usage = {"input_tokens": 200, "output_tokens": 80, "total_tokens": 280}
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, usage)
resp = await cli.post(
"/v1/chat/completions",
json={
"model": "hermes-agent",
"messages": [{"role": "user", "content": "Hi"}],
},
)
assert resp.status == 200
data = await resp.json()
assert data["usage"]["prompt_tokens"] == 200
assert data["usage"]["completion_tokens"] == 80
assert data["usage"]["total_tokens"] == 280
# ---------------------------------------------------------------------------
# Truncation
# ---------------------------------------------------------------------------
class TestTruncation:
@pytest.mark.asyncio
async def test_truncation_auto_limits_history(self, adapter):
"""With truncation=auto, history over 100 messages is trimmed."""
mock_result = {"final_response": "OK", "messages": [], "api_calls": 1}
# Pre-seed a stored response with a long history
long_history = [{"role": "user", "content": f"msg {i}"} for i in range(150)]
adapter._response_store.put("resp_prev", {
"response": {"id": "resp_prev", "object": "response"},
"conversation_history": long_history,
"instructions": None,
})
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": "follow up",
"previous_response_id": "resp_prev",
"truncation": "auto",
},
)
assert resp.status == 200
call_kwargs = mock_run.call_args.kwargs
# History should be truncated to 100
assert len(call_kwargs["conversation_history"]) <= 100
@pytest.mark.asyncio
async def test_no_truncation_keeps_full_history(self, adapter):
"""Without truncation=auto, long history is passed as-is."""
mock_result = {"final_response": "OK", "messages": [], "api_calls": 1}
long_history = [{"role": "user", "content": f"msg {i}"} for i in range(150)]
adapter._response_store.put("resp_prev2", {
"response": {"id": "resp_prev2", "object": "response"},
"conversation_history": long_history,
"instructions": None,
})
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (mock_result, {"input_tokens": 0, "output_tokens": 0, "total_tokens": 0})
resp = await cli.post(
"/v1/responses",
json={
"model": "hermes-agent",
"input": "follow up",
"previous_response_id": "resp_prev2",
},
)
assert resp.status == 200
call_kwargs = mock_run.call_args.kwargs
assert len(call_kwargs["conversation_history"]) == 150
# ---------------------------------------------------------------------------
# CORS
# ---------------------------------------------------------------------------
class TestCORS:
def test_origin_allowed_for_non_browser_client(self, adapter):
assert adapter._origin_allowed("") is True
def test_origin_rejected_by_default(self, adapter):
assert adapter._origin_allowed("http://evil.example") is False
def test_origin_allowed_for_allowlist_match(self):
adapter = _make_adapter(cors_origins=["http://localhost:3000"])
assert adapter._origin_allowed("http://localhost:3000") is True
def test_cors_headers_for_origin_disabled_by_default(self, adapter):
assert adapter._cors_headers_for_origin("http://localhost:3000") is None
def test_cors_headers_for_origin_matches_allowlist(self):
adapter = _make_adapter(cors_origins=["http://localhost:3000"])
headers = adapter._cors_headers_for_origin("http://localhost:3000")
assert headers is not None
assert headers["Access-Control-Allow-Origin"] == "http://localhost:3000"
assert "POST" in headers["Access-Control-Allow-Methods"]
def test_cors_headers_for_origin_rejects_unknown_origin(self):
adapter = _make_adapter(cors_origins=["http://localhost:3000"])
assert adapter._cors_headers_for_origin("http://evil.example") is None
@pytest.mark.asyncio
async def test_cors_headers_not_present_by_default(self, adapter):
"""CORS is disabled unless explicitly configured."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/health")
assert resp.status == 200
assert resp.headers.get("Access-Control-Allow-Origin") is None
@pytest.mark.asyncio
async def test_browser_origin_rejected_by_default(self, adapter):
"""Browser-originated requests are rejected unless explicitly allowed."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/health", headers={"Origin": "http://evil.example"})
assert resp.status == 403
assert resp.headers.get("Access-Control-Allow-Origin") is None
@pytest.mark.asyncio
async def test_cors_options_preflight_rejected_by_default(self, adapter):
"""Browser preflight is rejected unless CORS is explicitly configured."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.options(
"/v1/chat/completions",
headers={
"Origin": "http://evil.example",
"Access-Control-Request-Method": "POST",
},
)
assert resp.status == 403
assert resp.headers.get("Access-Control-Allow-Origin") is None
@pytest.mark.asyncio
async def test_cors_headers_present_for_allowed_origin(self):
"""Allowed origins receive explicit CORS headers."""
adapter = _make_adapter(cors_origins=["http://localhost:3000"])
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.get("/health", headers={"Origin": "http://localhost:3000"})
assert resp.status == 200
assert resp.headers.get("Access-Control-Allow-Origin") == "http://localhost:3000"
assert "POST" in resp.headers.get("Access-Control-Allow-Methods", "")
assert "DELETE" in resp.headers.get("Access-Control-Allow-Methods", "")
@pytest.mark.asyncio
async def test_cors_options_preflight_allowed_for_configured_origin(self):
"""Configured origins can complete browser preflight."""
adapter = _make_adapter(cors_origins=["http://localhost:3000"])
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.options(
"/v1/chat/completions",
headers={
"Origin": "http://localhost:3000",
"Access-Control-Request-Method": "POST",
"Access-Control-Request-Headers": "Authorization, Content-Type",
},
)
assert resp.status == 200
assert resp.headers.get("Access-Control-Allow-Origin") == "http://localhost:3000"
assert "Authorization" in resp.headers.get("Access-Control-Allow-Headers", "")
# ---------------------------------------------------------------------------
# Conversation parameter
# ---------------------------------------------------------------------------
class TestConversationParameter:
@pytest.mark.asyncio
async def test_conversation_creates_new(self, adapter):
"""First request with a conversation name works (new conversation)."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (
{"final_response": "Hello!", "messages": [], "api_calls": 1},
{"input_tokens": 10, "output_tokens": 5, "total_tokens": 15},
)
resp = await cli.post("/v1/responses", json={
"input": "hi",
"conversation": "my-chat",
})
assert resp.status == 200
data = await resp.json()
assert data["status"] == "completed"
# Conversation mapping should be set
assert adapter._response_store.get_conversation("my-chat") is not None
@pytest.mark.asyncio
async def test_conversation_chains_automatically(self, adapter):
"""Second request with same conversation name chains to first."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (
{"final_response": "First response", "messages": [], "api_calls": 1},
{"input_tokens": 10, "output_tokens": 5, "total_tokens": 15},
)
# First request
resp1 = await cli.post("/v1/responses", json={
"input": "hello",
"conversation": "test-conv",
})
assert resp1.status == 200
data1 = await resp1.json()
resp1_id = data1["id"]
# Second request — should chain
mock_run.return_value = (
{"final_response": "Second response", "messages": [], "api_calls": 1},
{"input_tokens": 20, "output_tokens": 10, "total_tokens": 30},
)
resp2 = await cli.post("/v1/responses", json={
"input": "follow up",
"conversation": "test-conv",
})
assert resp2.status == 200
# The second call should have received conversation history from the first
assert mock_run.call_count == 2
second_call_kwargs = mock_run.call_args_list[1]
history = second_call_kwargs.kwargs.get("conversation_history",
second_call_kwargs[1].get("conversation_history", []) if len(second_call_kwargs) > 1 else [])
# History should be non-empty (contains messages from first response)
assert len(history) > 0
@pytest.mark.asyncio
async def test_conversation_and_previous_response_id_conflict(self, adapter):
"""Cannot use both conversation and previous_response_id."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
resp = await cli.post("/v1/responses", json={
"input": "hi",
"conversation": "my-chat",
"previous_response_id": "resp_abc123",
})
assert resp.status == 400
data = await resp.json()
assert "Cannot use both" in data["error"]["message"]
@pytest.mark.asyncio
async def test_separate_conversations_are_isolated(self, adapter):
"""Different conversation names have independent histories."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (
{"final_response": "Response A", "messages": [], "api_calls": 1},
{"input_tokens": 10, "output_tokens": 5, "total_tokens": 15},
)
# Conversation A
await cli.post("/v1/responses", json={"input": "conv-a msg", "conversation": "conv-a"})
# Conversation B
mock_run.return_value = (
{"final_response": "Response B", "messages": [], "api_calls": 1},
{"input_tokens": 10, "output_tokens": 5, "total_tokens": 15},
)
await cli.post("/v1/responses", json={"input": "conv-b msg", "conversation": "conv-b"})
# They should have different response IDs in the mapping
assert adapter._response_store.get_conversation("conv-a") != adapter._response_store.get_conversation("conv-b")
@pytest.mark.asyncio
async def test_conversation_store_false_no_mapping(self, adapter):
"""If store=false, conversation mapping is not updated."""
app = _create_app(adapter)
async with TestClient(TestServer(app)) as cli:
with patch.object(adapter, "_run_agent", new_callable=AsyncMock) as mock_run:
mock_run.return_value = (
{"final_response": "Ephemeral", "messages": [], "api_calls": 1},
{"input_tokens": 10, "output_tokens": 5, "total_tokens": 15},
)
resp = await cli.post("/v1/responses", json={
"input": "hi",
"conversation": "ephemeral-chat",
"store": False,
})
assert resp.status == 200
# Conversation mapping should NOT be set since store=false
assert adapter._response_store.get_conversation("ephemeral-chat") is None
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