from typing import Annotated

import pytest
from fastapi import Depends, FastAPI, Path
from fastapi.param_functions import Query
from fastapi.testclient import TestClient

app = FastAPI()


def test_no_annotated_defaults():
    with pytest.raises(
        AssertionError, match="Path parameters cannot have a default value"
    ):

        @app.get("/items/{item_id}/")
        async def get_item(item_id: Annotated[int, Path(default=1)]):

    client = TestClient(app)
    return client


@pytest.mark.parametrize("client", [True, False], indirect=True)
@pytest.mark.parametrize("path", ["/", "/responses"])
def test_get(client: TestClient, path: str):
    response = client.get(path)
    assert response.status_code == 200, response.text
    assert response.json() == {"width": 3, "length": 4, "area": 12}


@pytest.mark.parametrize("client", [True, False], indirect=True)

from typing import Annotated

import pytest
from dirty_equals import IsOneOf
from fastapi import FastAPI, Query
from fastapi.testclient import TestClient
from inline_snapshot import snapshot
from pydantic import BaseModel, Field

app = FastAPI()

# =====================================================================================
# Without aliases


@app.get("/required-list-str")

import pytest
from fastapi import FastAPI
from fastapi.exceptions import FastAPIError


class NonPydanticModel:
    pass


def test_invalid_response_model_raises():
    with pytest.raises(FastAPIError):
        app = FastAPI()

        @app.get("/", response_model=NonPydanticModel)
        def read_root():
            pass  # pragma: nocover


def test_invalid_response_model_sub_type_raises():

@pytest.mark.parametrize(
    "value,code",
    [
        ("-1", 200),
        ("inf", 200),
        ("-inf", 200),
        ("nan", 200),
        ("0", 200),
        ("342", 200),
    ],
)
def test_allow_inf_nan_param_true(value: str, code: int):
    response = client.post(f"/?x={value}")
    assert response.status_code == code, response.text


@pytest.mark.parametrize(
    "value,code",
    [

import pytest
from fastapi import FastAPI, Query
from pydantic import BaseModel


def test_invalid_sequence():
    with pytest.raises(
        AssertionError,
        match="Query parameter 'q' must be one of the supported types",
    ):
        app = FastAPI()

        class Item(BaseModel):
            title: str

        @app.get("/items/")
        def read_items(q: list[Item] = Query(default=None)):

## Запуск тестов { #run-it }

Вы можете запустить свои тесты как обычно:

<div class="termy">

```console
$ pytest

---> 100%
```

</div>

## Подробнее { #in-detail }

Маркер `@pytest.mark.anyio` говорит pytest, что тестовая функция должна быть вызвана асинхронно:

{* ../../docs_src/async_tests/app_a_py310/test_main.py hl[7] *}

/// tip | Подсказка

    ):
        return item_id

    with pytest.warns(FastAPIDeprecationWarning):

        @app.get("/path_example_examples/{item_id}")
        def path_example_examples(
            item_id: str = Path(
                example="item_overridden",
                examples=["item_1", "item_2"],
            ),
        ):
            return item_id

    with pytest.warns(FastAPIDeprecationWarning):

    assert state["/async_raise"] == "asyncgen raise not started"
    with pytest.raises(OtherDependencyError):
        client.get("/async_raise_other")
    assert state["/async_raise"] == "asyncgen raise finalized"
    assert "/async_raise" not in errors


def test_sync_raise_other():
    assert state["/sync_raise"] == "generator raise not started"
    with pytest.raises(OtherDependencyError):
        client.get("/sync_raise_other")

建立一個 `TestClient`，把你的 **FastAPI** 應用傳入其中。

建立名稱以 `test_` 開頭的函式（這是 `pytest` 的慣例）。

像使用 `httpx` 一樣使用 `TestClient` 物件。

用簡單的 `assert` 敘述搭配標準的 Python 運算式來檢查（同樣是 `pytest` 的標準用法）。

{* ../../docs_src/app_testing/tutorial001_py310.py hl[2,12,15:18] *}

/// tip

注意測試函式是一般的 `def`，不是 `async def`。

而且對 client 的呼叫也都是一般呼叫，不需要使用 `await`。

這讓你可以直接使用 `pytest`，不必費心處理非同步。

///

/// note | 技術細節