import pytest
from fastapi.testclient import TestClient

from ...utils import needs_py310, needs_pydanticv2


@pytest.fixture(name="client")
def get_client():
    from docs_src.schema_extra_example.tutorial001_py310 import app

    client = TestClient(app)
    return client


@needs_py310
@needs_pydanticv2
def test_post_body_example(client: TestClient):
    response = client.put(
        "/items/5",
        json={

from fastapi.testclient import TestClient

from docs_src.events.tutorial003 import (
    app,
    fake_answer_to_everything_ml_model,
    ml_models,
)


def test_events():
    assert not ml_models, "ml_models should be empty"
    with TestClient(app) as client:
        assert ml_models["answer_to_everything"] == fake_answer_to_everything_ml_model
        response = client.get("/predict", params={"x": 2})

import pytest
from dirty_equals import IsDict
from fastapi.testclient import TestClient


@pytest.fixture(name="client")
def get_client():
    from docs_src.body_multiple_params.tutorial003 import app

    client = TestClient(app)
    return client


def test_post_body_valid(client: TestClient):
    response = client.put(
        "/items/5",
        json={
            "importance": 2,

from dirty_equals import IsDict
from fastapi.testclient import TestClient

from docs_src.request_files.tutorial002_an import app

client = TestClient(app)


def test_post_form_no_body():
    response = client.post("/files/")
    assert response.status_code == 422, response.text
    assert response.json() == IsDict(
        {
            "detail": [
                {
                    "type": "missing",

from fastapi.testclient import TestClient

from docs_src.response_model.tutorial003_05 import app

client = TestClient(app)


def test_get_portal():
    response = client.get("/portal")
    assert response.status_code == 200, response.text
    assert response.json() == {"message": "Here's your interdimensional portal."}


def test_get_redirect():
    response = client.get("/portal", params={"teleport": True}, follow_redirects=False)

from fastapi import FastAPI
from fastapi.testclient import TestClient

app = FastAPI()


@app.put("/items/{item_id}")
def save_item_no_body(item_id: str):
    return {"item_id": item_id}


client = TestClient(app)


def test_put_no_body():
    response = client.put("/items/foo")
    assert response.status_code == 200, response.text
    assert response.json() == {"item_id": "foo"}


def test_put_no_body_with_body():

from typing import Optional

from fastapi import Depends, FastAPI, Security
from fastapi.security import APIKeyQuery
from fastapi.testclient import TestClient
from pydantic import BaseModel

app = FastAPI()

api_key = APIKeyQuery(name="key", auto_error=False)


class User(BaseModel):
    username: str


def get_current_user(oauth_header: Optional[str] = Security(api_key)):
    if oauth_header is None:
        return None

import pytest
from dirty_equals import IsDict
from fastapi import APIRouter, FastAPI, Query
from fastapi.testclient import TestClient
from typing_extensions import Annotated

app = FastAPI()


@app.get("/default")
async def default(foo: Annotated[str, Query()] = "foo"):
    return {"foo": foo}


@app.get("/required")
async def required(foo: Annotated[str, Query(min_length=1)]):
    return {"foo": foo}


@app.get("/multiple")

import pytest
from dirty_equals import IsDict
from fastapi.testclient import TestClient

from ...utils import needs_py39


@pytest.fixture(name="client")
def get_client():
    from docs_src.schema_extra_example.tutorial005_an_py39 import app

    client = TestClient(app)
    return client


@needs_py39
def test_post_body_example(client: TestClient):
    response = client.put(
        "/items/5",
        json={

<a href="https://www.python-httpx.org" class="external-link" target="_blank">HTTPX</a> がベースなので、非常に使いやすく直感的です。

これを使用すると、**FastAPI** と共に <a href="https://docs.pytest.org/" class="external-link" target="_blank">pytest</a> を直接利用できます。

## `TestClient` を使用

`TestClient` をインポートします。

`TestClient` を作成し、**FastAPI** に渡します。