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80 lines
2.0 KiB
Python
80 lines
2.0 KiB
Python
from contextlib import contextmanager
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from typing import Any, Generator
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import pytest
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from fastapi import Depends, FastAPI, WebSocket
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from fastapi.testclient import TestClient
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from typing_extensions import Annotated
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class Session:
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def __init__(self) -> None:
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self.data = ["foo", "bar", "baz"]
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self.open = True
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def __iter__(self) -> Generator[str, None, None]:
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for item in self.data:
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if self.open:
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yield item
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else:
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raise ValueError("Session closed")
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@contextmanager
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def acquire_session() -> Generator[Session, None, None]:
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session = Session()
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try:
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yield session
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finally:
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session.open = False
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def dep_session() -> Any:
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with acquire_session() as s:
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yield s
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def broken_dep_session() -> Any:
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with acquire_session() as s:
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s.open = False
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yield s
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SessionDep = Annotated[Session, Depends(dep_session)]
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BrokenSessionDep = Annotated[Session, Depends(broken_dep_session)]
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app = FastAPI()
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@app.websocket("/ws")
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async def websocket_endpoint(websocket: WebSocket, session: SessionDep):
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await websocket.accept()
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for item in session:
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await websocket.send_text(f"{item}")
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@app.websocket("/ws-broken")
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async def websocket_endpoint_broken(websocket: WebSocket, session: BrokenSessionDep):
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await websocket.accept()
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for item in session:
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await websocket.send_text(f"{item}") # pragma no cover
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client = TestClient(app)
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def test_websocket_dependency_after_yield():
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with client.websocket_connect("/ws") as websocket:
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data = websocket.receive_text()
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assert data == "foo"
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data = websocket.receive_text()
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assert data == "bar"
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data = websocket.receive_text()
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assert data == "baz"
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def test_websocket_dependency_after_yield_broken():
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with pytest.raises(ValueError, match="Session closed"):
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with client.websocket_connect("/ws-broken"):
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pass # pragma no cover
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