### Альтернативная документация API { #alternative-api-docs }

И теперь перейдите по адресу [http://127.0.0.1:8000/redoc](http://127.0.0.1:8000/redoc).

Вы увидите альтернативную автоматически сгенерированную документацию (предоставлено [ReDoc](https://github.com/Rebilly/ReDoc)):

![ReDoc](https://fastapi.tiangolo.com/img/index/index-02-redoc-simple.png)

### OpenAPI { #openapi }

      builder.addHeader("", "Value")
    }
  }

  @Test
  fun headerAllowsTabOnlyInValues() {
    val builder = Request.Builder()
    builder.header("key", "sample\tvalue")
    assertFailsWith<IllegalArgumentException> {
      builder.header("sample\tkey", "value")
    }
  }

  @Test
  fun headerForbidsControlCharacters() {
    assertForbiddenHeader("\u0000")
    assertForbiddenHeader("\r")

    return result;
  }

  public abstract static class TestDoubleListGenerator implements TestListGenerator<Double> {
    @Override
    public SampleElements<Double> samples() {
      return new SampleDoubles();
    }

    @Override
    public List<Double> create(Object... elements) {
      Double[] array = new Double[elements.length];
      int i = 0;

 * {@code NtlmServlet}, and {@code NetworkExplorer} to negotiate password
 * hashes via NTLM SSP with MSIE. It might also be used directly by servlet
 * containers to incorporate similar functionality.
 * <p>
 * How NTLMSSP is used in conjunction with HTTP and MSIE clients is
 * described in an <A HREF="http://www.innovation.ch/java/ntlm.html">NTLM
 * Authentication Scheme for HTTP</A>.
 * <p>

Вы увидите автоматическую интерактивную документацию API (на базе [Swagger UI](https://github.com/swagger-api/swagger-ui)):

![Swagger UI](https://fastapi.tiangolo.com/img/index/index-01-swagger-ui-simple.png)

## Альтернативная документация API { #alternative-api-docs }

   * elements left in the iteration.
   *
   * @return {@code null}; a convenience so your {@code computeNext} implementation can use the
   *     simple statement {@code return endOfData();}
   */
  @CanIgnoreReturnValue
  protected final @Nullable T endOfData() {
    state = State.DONE;
    return null;
  }

  @Override

        verify(handle).getSession();
    }

    @Test
    @DisplayName("Scenario: verify interaction order across multiple calls")
    void verifyInteractionOrder() throws Exception {
        // Arrange: stub simple returns
        when(handle.hasCapability(anyInt())).thenReturn(true);

        // Act: perform a series of calls to verify order
        handle.ensureDFSResolved();
        handle.hasCapability(7);

Create functions with a name that starts with `test_` (this is standard `pytest` conventions).

Use the `TestClient` object the same way as you do with `httpx`.

Write simple `assert` statements with the standard Python expressions that you need to check (again, standard `pytest`).

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

/// tip

依存関係（およびサブ依存関係）のすべてのリクエスト宣言、検証、および要件は、同じOpenAPIスキーマに統合されます。

つまり、対話型ドキュメントにはこれらの依存関係から得られる全ての情報も含まれているということです:

<img src="/img/tutorial/dependencies/image01.png">

## 簡単な使い方 { #simple-usage }

見てみると、*path*と*operation*が一致した時に*path operation 関数*が宣言されていて、**FastAPI** が正しいパラメータで関数を呼び出してリクエストからデータを抽出する処理をしています。

実は、すべての（あるいはほとんどの）Webフレームワークは、このように動作します。

		return nil, &os.PathError{
			Op:   "open",
			Path: path,
			Err:  syscall.EISDIR,
		}
	}

	return &LockedFile{f}, nil
}

// TryLockedOpenFile - tries a new write lock, functionality
// it is similar to LockedOpenFile with with syscall.LOCK_EX
// mode but along with syscall.LOCK_NB such that the function
// doesn't wait forever but instead returns if it cannot
// acquire a write lock.