mirror of https://github.com/tiangolo/fastapi.git
90 lines
2.5 KiB
Python
90 lines
2.5 KiB
Python
import pytest
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from anyio import open_file
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from fastapi import Depends, FastAPI
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from fastapi.testclient import TestClient
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app = FastAPI()
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def get_username_reraises():
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try:
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with open("/nonexistent/path.txt") as f:
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yield f.read() # pragma: no cover
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except OSError as ex:
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raise RuntimeError("File read error") from ex
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def get_username_doesnt_reraise():
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try:
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with open("/nonexistent/path.txt") as f:
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yield f.read() # pragma: no cover
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except OSError:
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print("Didn't re-raise")
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async def get_username_reraises_async():
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try:
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async with await open_file("/nonexistent/path.txt", "r") as f:
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yield await f.read() # pragma: no cover
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except OSError as ex:
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raise RuntimeError("File read error") from ex
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async def get_username_doesnt_reraise_async():
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try:
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async with await open_file("/nonexistent/path.txt", "r") as f:
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yield await f.read() # pragma: no cover
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except OSError:
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print("Didn't re-raise")
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@app.get("/reraises")
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def get_me_reraises(username: str = Depends(get_username_reraises)):
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return username # pragma: no cover
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@app.get("/doesnt-reraise")
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def get_me_doesnt_reraise(username: str = Depends(get_username_doesnt_reraise)):
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return username # pragma: no cover
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@app.get("/reraises-async")
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def get_me_reraises_async(username: str = Depends(get_username_reraises_async)):
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return username # pragma: no cover
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@app.get("/doesnt-reraise-async")
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def get_me_doesnt_reraise_async(
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username: str = Depends(get_username_doesnt_reraise_async),
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):
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return username # pragma: no cover
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client = TestClient(app)
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@pytest.mark.anyio
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@pytest.mark.parametrize("path", ["/reraises", "/reraises-async"])
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def test_runtime_error_reraises(path: str):
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with pytest.raises(RuntimeError) as exc_info:
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client.get(path)
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assert str(exc_info.value) == "File read error"
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@pytest.mark.anyio
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@pytest.mark.parametrize(
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("path", "fn_name"),
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[
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("/doesnt-reraise", "get_username_doesnt_reraise"),
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("/doesnt-reraise-async", "get_username_doesnt_reraise_async"),
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],
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)
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def test_runtime_error_doesnt_reraise(path: str, fn_name: str):
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with pytest.raises(RuntimeError) as exc_info:
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client.get(path)
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assert str(exc_info.value).startswith(
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f"Dependency {fn_name} raised: generator didn't yield. "
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"There's a high chance that this is a dependency with yield that catches an "
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"exception using except, but doesn't raise the exception again."
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)
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