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from unittest.mock import MagicMock, patch
import pytest
from fastapi import HTTPException
from api_utils.routers.chat import chat_completions
from models import ChatCompletionRequest, Message
@pytest.mark.asyncio
async def test_chat_completions_success():
request = ChatCompletionRequest(
messages=[Message(role="user", content="hello")], model="gpt-4"
)
http_request = MagicMock()
logger = MagicMock()
request_queue = asyncio.Queue()
server_state = {
"is_initializing": False,
"is_playwright_ready": True,
"is_page_ready": True,
"is_browser_connected": True,
}
worker_task = MagicMock()
worker_task.done.return_value = False
# Simulate worker processing
async def process_queue():
item = await request_queue.get()
item["result_future"].set_result({"response": "ok"})
asyncio.create_task(process_queue())
response = await chat_completions(
request=request,
http_request=http_request,
logger=logger,
request_queue=request_queue,
server_state=server_state,
worker_task=worker_task,
)
assert response == {"response": "ok"}
@pytest.mark.asyncio
async def test_chat_completions_service_unavailable():
request = ChatCompletionRequest(
messages=[Message(role="user", content="hello")], model="gpt-4"
)
http_request = MagicMock()
logger = MagicMock()
request_queue = asyncio.Queue()
server_state = {
"is_initializing": True, # Service unavailable
"is_playwright_ready": True,
"is_page_ready": True,
"is_browser_connected": True,
}
worker_task = MagicMock()
worker_task.done.return_value = False
with pytest.raises(HTTPException) as excinfo:
await chat_completions(
request=request,
http_request=http_request,
logger=logger,
request_queue=request_queue,
server_state=server_state,
worker_task=worker_task,
)
assert excinfo.value.status_code == 503
@pytest.mark.asyncio
async def test_chat_completions_timeout():
# Mock asyncio.wait_for to raise TimeoutError immediately
async def mock_wait_for(fut, timeout):
raise asyncio.TimeoutError()
request = ChatCompletionRequest(
messages=[Message(role="user", content="hello")], model="gpt-4"
)
http_request = MagicMock()
logger = MagicMock()
request_queue = asyncio.Queue()
server_state = {
"is_initializing": False,
"is_playwright_ready": True,
"is_page_ready": True,
"is_browser_connected": True,
}
worker_task = MagicMock()
worker_task.done.return_value = False
with patch("asyncio.wait_for", new=mock_wait_for):
with pytest.raises(HTTPException) as excinfo:
await chat_completions(
request=request,
http_request=http_request,
logger=logger,
request_queue=request_queue,
server_state=server_state,
worker_task=worker_task,
)
assert excinfo.value.status_code == 504
@pytest.mark.asyncio
async def test_chat_completions_cancelled():
request = ChatCompletionRequest(
messages=[Message(role="user", content="hello")], model="gpt-4"
)
http_request = MagicMock()
logger = MagicMock()
request_queue = asyncio.Queue()
server_state = {
"is_initializing": False,
"is_playwright_ready": True,
"is_page_ready": True,
"is_browser_connected": True,
}
worker_task = MagicMock()
worker_task.done.return_value = False
# Simulate cancellation
async def cancel_request():
item = await request_queue.get()
item["result_future"].cancel()
asyncio.create_task(cancel_request())
with pytest.raises(asyncio.CancelledError):
await chat_completions(
request=request,
http_request=http_request,
logger=logger,
request_queue=request_queue,
server_state=server_state,
worker_task=worker_task,
)
"""
Extended tests for api_utils/routers/chat.py - Exception handling coverage.
Focus: Cover lines 71-79 (HTTPException and generic Exception handlers).
Strategy: Mock result_future to raise exceptions when awaited.
"""
@pytest.mark.asyncio
async def test_chat_completions_http_exception_499():
"""
Test scenario: result_future.wait throws HTTPException (status_code=499)
Expected: Log client disconnect and re-throw exception (lines 71-76, 72-73)
"""
request = ChatCompletionRequest(
messages=[Message(role="user", content="hello")], model="gpt-4"
)
http_request = MagicMock()
logger = MagicMock()
request_queue = asyncio.Queue()
server_state = {
"is_initializing": False,
"is_playwright_ready": True,
"is_page_ready": True,
"is_browser_connected": True,
}
worker_task = MagicMock()
worker_task.done.return_value = False
# Simulate worker raising HTTPException with 499
async def process_queue():
item = await request_queue.get()
item["result_future"].set_exception(
HTTPException(status_code=499, detail="Client disconnected")
)
asyncio.create_task(process_queue())
# Execute
with pytest.raises(HTTPException) as excinfo:
await chat_completions(
request=request,
http_request=http_request,
logger=logger,
request_queue=request_queue,
server_state=server_state,
worker_task=worker_task,
)
# Verify: status_code=499 (lines 71-76)
assert excinfo.value.status_code == 499
assert "Client disconnected" in str(excinfo.value.detail)
# Verify: logger.info called twice (line 31 and line 73)
assert logger.info.call_count == 2
# Second call contains disconnect message (line 73)
assert "Client disconnected" in logger.info.call_args[0][0]
@pytest.mark.asyncio
async def test_chat_completions_http_exception_non_499():
"""
Test scenario: result_future.wait throws HTTPException (status_code != 499)
Expected: Log HTTP exception warning and re-throw exception (lines 71-76, 74-75)
"""
request = ChatCompletionRequest(
messages=[Message(role="user", content="hello")], model="gpt-4"
)
http_request = MagicMock()
logger = MagicMock()
request_queue = asyncio.Queue()
server_state = {
"is_initializing": False,
"is_playwright_ready": True,
"is_page_ready": True,
"is_browser_connected": True,
}
worker_task = MagicMock()
worker_task.done.return_value = False
# Simulate worker raising HTTPException with 400
async def process_queue():
item = await request_queue.get()
item["result_future"].set_exception(
HTTPException(status_code=400, detail="Bad request")
)
asyncio.create_task(process_queue())
# Execute
with pytest.raises(HTTPException) as excinfo:
await chat_completions(
request=request,
http_request=http_request,
logger=logger,
request_queue=request_queue,
server_state=server_state,
worker_task=worker_task,
)
# Verify: status_code=400 (lines 71-76)
assert excinfo.value.status_code == 400
assert "Bad request" in str(excinfo.value.detail)
# Verify: logger.warning called (line 75)
# logger.info will also be called once (line 31), but we only care about warning
assert logger.warning.call_count >= 1
# Last warning call contains HTTP exception message (line 75)
assert "HTTP exception" in logger.warning.call_args[0][0]
@pytest.mark.asyncio
async def test_chat_completions_generic_exception():
"""
Test scenario: result_future.wait throws non-HTTPException
Expected: Log exception and convert to 500 error (lines 77-79)
"""
request = ChatCompletionRequest(
messages=[Message(role="user", content="hello")], model="gpt-4"
)
http_request = MagicMock()
logger = MagicMock()
request_queue = asyncio.Queue()
server_state = {
"is_initializing": False,
"is_playwright_ready": True,
"is_page_ready": True,
"is_browser_connected": True,
}
worker_task = MagicMock()
worker_task.done.return_value = False
# Simulate worker raising generic Exception
async def process_queue():
item = await request_queue.get()
item["result_future"].set_exception(ValueError("Unexpected error"))
asyncio.create_task(process_queue())
# Execute
with pytest.raises(HTTPException) as excinfo:
await chat_completions(
request=request,
http_request=http_request,
logger=logger,
request_queue=request_queue,
server_state=server_state,
worker_task=worker_task,
)
# Verify: Convert to 500 error (line 79)
assert excinfo.value.status_code == 500
assert "Internal server error" in str(excinfo.value.detail)
assert "Unexpected error" in str(excinfo.value.detail)
# Verify: logger.exception called (line 78)
assert logger.exception.call_count >= 1
# Last exception call contains error message while waiting for response (line 78)
assert "Error waiting for Worker response" in logger.exception.call_args[0][0]
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