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from typing import List, Optional, Union
import pytest
from fastapi import FastAPI
from fastapi.exceptions import ResponseValidationError
from fastapi.testclient import TestClient
from pydantic import BaseModel
app = FastAPI()
class Item(BaseModel):
name: str
price: Optional[float] = None
owner_ids: Optional[List[int]] = None
@app.get("/items/invalid", response_model=Item)
def get_invalid():
return {"name": "invalid", "price": "foo"}
@app.get("/items/invalidnone", response_model=Item)
def get_invalid_none():
return None
@app.get("/items/validnone", response_model=Union[Item, None])
def get_valid_none(send_none: bool = False):
if send_none:
return None
else:
return {"name": "invalid", "price": 3.2}
@app.get("/items/innerinvalid", response_model=Item)
def get_innerinvalid():
return {"name": "double invalid", "price": "foo", "owner_ids": ["foo", "bar"]}
@app.get("/items/invalidlist", response_model=List[Item])
def get_invalidlist():
return [
{"name": "foo"},
{"name": "bar", "price": "bar"},
{"name": "baz", "price": "baz"},
]
client = TestClient(app)
def test_invalid():
with pytest.raises(ResponseValidationError):
client.get("/items/invalid")
def test_invalid_none():
with pytest.raises(ResponseValidationError):
client.get("/items/invalidnone")
def test_valid_none_data():
response = client.get("/items/validnone")
data = response.json()
assert response.status_code == 200
assert data == {"name": "invalid", "price": 3.2, "owner_ids": None}
def test_valid_none_none():
response = client.get("/items/validnone", params={"send_none": "true"})
data = response.json()
assert response.status_code == 200
assert data is None
def test_double_invalid():
with pytest.raises(ResponseValidationError):
client.get("/items/innerinvalid")
def test_invalid_list():
with pytest.raises(ResponseValidationError):
client.get("/items/invalidlist")
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