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import pytest
from fastapi import Body, Depends, FastAPI, HTTPException
from fastapi.testclient import TestClient
initial_fake_database = {"rick": "Rick Sanchez"}
fake_database = initial_fake_database.copy()
initial_state = {"except": False, "finally": False}
state = initial_state.copy()
app = FastAPI()
async def get_database():
temp_database = fake_database.copy()
try:
yield temp_database
fake_database.update(temp_database)
except HTTPException:
state["except"] = True
raise
finally:
state["finally"] = True
@app.put("/invalid-user/{user_id}")
def put_invalid_user(
user_id: str, name: str = Body(), db: dict = Depends(get_database)
):
db[user_id] = name
raise HTTPException(status_code=400, detail="Invalid user")
@app.put("/user/{user_id}")
def put_user(user_id: str, name: str = Body(), db: dict = Depends(get_database)):
db[user_id] = name
return {"message": "OK"}
@pytest.fixture(autouse=True)
def reset_state_and_db():
global fake_database
global state
fake_database = initial_fake_database.copy()
state = initial_state.copy()
client = TestClient(app)
def test_dependency_gets_exception():
assert state["except"] is False
assert state["finally"] is False
response = client.put("/invalid-user/rick", json="Morty")
assert response.status_code == 400, response.text
assert response.json() == {"detail": "Invalid user"}
assert state["except"] is True
assert state["finally"] is True
assert fake_database["rick"] == "Rick Sanchez"
def test_dependency_no_exception():
assert state["except"] is False
assert state["finally"] is False
response = client.put("/user/rick", json="Morty")
assert response.status_code == 200, response.text
assert response.json() == {"message": "OK"}
assert state["except"] is False
assert state["finally"] is True
assert fake_database["rick"] == "Morty"
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