return {}


client = TestClient(app)


def test_get_route():
    response = client.get("/")
    assert response.status_code == 200, response.text
    assert response.json() == {}


def test_openapi():
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == snapshot(
        {
            "openapi": "3.1.0",

from fastapi import Body, FastAPI, status
from fastapi.responses import JSONResponse

app = FastAPI()

items = {"foo": {"name": "Fighters", "size": 6}, "bar": {"name": "Tenders", "size": 3}}


@app.put("/items/{item_id}")
async def upsert_item(
    item_id: str,
    name: str | None = Body(default=None),
    size: int | None = Body(default=None),
):
    if item_id in items:
        item = items[item_id]
        item["name"] = name

            }
        });
        return response;
    }

    /**
     * Writes no-cache headers to the response.
     *
     * @param response the stream response
     * @param responseData the response data
     */
    protected void writeNoCache(final StreamResponse response, final ResponseData responseData) {
        response.header("Pragma", "no-cache");
        response.header("Cache-Control", "no-cache");

client = TestClient(app)


def test_multi_query():
    response = client.get("/items/?q=5&q=6")
    assert response.status_code == 200, response.text
    assert response.json() == {"q": [5, 6]}


def test_multi_query_incorrect():
    response = client.get("/items/?q=five&q=six")
    assert response.status_code == 422, response.text
    assert response.json() == {
        "detail": [
            {

client = TestClient(app)


def test_path_operation():
    response = client.get("/items/foo")
    assert response.status_code == 200, response.text
    assert response.json() == {"id": "foo", "value": "there goes my hero"}


def test_path_operation_not_found():
    response = client.get("/items/bar")
    assert response.status_code == 404, response.text
    assert response.json() == {"message": "Item not found"}

from fastapi import FastAPI, HTTPException
from fastapi.exceptions import RequestValidationError
from fastapi.responses import PlainTextResponse
from starlette.exceptions import HTTPException as StarletteHTTPException

app = FastAPI()


@app.exception_handler(StarletteHTTPException)
async def http_exception_handler(request, exc):
    return PlainTextResponse(str(exc.detail), status_code=exc.status_code)

from typing import Annotated

from fastapi import FastAPI, File, UploadFile
from fastapi.responses import HTMLResponse

app = FastAPI()


@app.post("/files/")
async def create_files(files: Annotated[list[bytes], File()]):
    return {"file_sizes": [len(file) for file in files]}


@app.post("/uploadfiles/")
async def create_upload_files(files: list[UploadFile]):
    return {"filenames": [file.filename for file in files]}

これで仕組みが分かったので、どれほど複雑でも自分のアプリで相対インポートを使えます。🤓

### カスタムの `tags`、`responses`、`dependencies` を追加 { #add-some-custom-tags-responses-and-dependencies }

`APIRouter` に追加済みなので、各 *path operation* に `/items` の prefix や `tags=["items"]` を付けていません。

しかし、特定の *path operation* に適用される _追加の_ `tags` や、その *path operation* 固有の追加の `responses` を加えることはできます:

import base64
from collections.abc import AsyncIterable, Iterable
from io import BytesIO

from fastapi import FastAPI
from fastapi.responses import StreamingResponse

                "msg": "Field required",
                "input": {},
            },
        ]
    }


def test_openapi_schema(client: TestClient):
    response = client.get("/openapi.json")
    assert response.status_code == 200, response.text
    assert response.json() == snapshot(
        {
            "openapi": "3.1.0",
            "info": {"title": "FastAPI", "version": "0.1.0"},
            "paths": {