"Work" shall mean the work of authorship, whether in Source or
      Object form, made available under the License, as indicated by a
      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the

      "Work" shall mean the work of authorship, whether in Source or
      Object form, made available under the License, as indicated by a
      copyright notice that is included in or attached to the work
      (an example is provided in the Appendix below).

      "Derivative Works" shall mean any work, whether in Source or Object
      form, that is based on (or derived from) the Work and for which the

        assertNull(source.getTitle());
        assertNull(source.getSnippet());

        source.setUrl("https://example.com");
        source.setTitle("Example Page");
        source.setSnippet("This is a snippet...");

        assertEquals("https://example.com", source.getUrl());
        assertEquals("Example Page", source.getTitle());
        assertEquals("This is a snippet...", source.getSnippet());
    }

    @Test

   *
   * <p>If {@code keys} is a {@link Set}, a live view can be obtained instead of a copy using {@link
   * Maps#asMap(Set, Function)}.
   *
   * <p><b>Note:</b> on Java 8+, it is usually better to use streams. For example:
   *
   * {@snippet :
   * import static com.google.common.collect.ImmutableMap.toImmutableMap;
   * ...
   * ImmutableMap<Color, String> colorNames =

 *   long yBits = Double.doubleToRawLongBits(y);
 *   return xBits == yBits;
 * }
 * }
 *
 * <p>It is possible to write a more scalable updater, at the cost of giving up strict atomicity.
 * See for example <a
 * href="http://gee.cs.oswego.edu/dl/jsr166/dist/docs/java.base/java/util/concurrent/atomic/DoubleAdder.html">
 * DoubleAdder</a>.
 *
 * @author Doug Lea
 * @author Martin Buchholz
 * @since 11.0
 */

`TestClient` は [HTTPX](https://www.python-httpx.org) を基に作られており、幸いなことに API のテストには HTTPX を直接利用できます。

## 例 { #example }

簡単な例として、[大きなアプリケーション](../tutorial/bigger-applications.md) と [テスト](../tutorial/testing.md) で説明したものに似たファイル構成を考えます:

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

 * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>.
 *
 * <p><b>Warning:</b> The methods of {@code ForwardingNavigableSet} forward <i>indiscriminately</i>
 * to the methods of the delegate. For example, overriding {@link #add} alone <i>will not</i> change
 * the behavior of {@link #addAll}, which can lead to unexpected behavior. In this case, you should

// path when needed, in order to avoid the default 260 character file
// path limit imposed by Windows. If path is not easily converted to
// the extended-length form (for example, if path is a relative path
// or contains .. elements), or is short enough, fixLongPath returns
// path unmodified.
//
// See https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx#maxpath

   *
   * <p>If this network {@link #allowsParallelEdges() allows parallel edges}, parallel edges will be
   * treated as if collapsed into a single edge. For example, the {@link #degree(Object)} of a node
   * in the {@link Graph} view may be less than the degree of the same node in this {@link Network}.
   */
  Graph<N> asGraph();

  //
  // Network properties
  //

<div class="termy">

```console
$ pip install "fastapi[standard]"

---> 100%
```

</div>

**Note**: 请确保把 `"fastapi[standard]"` 用引号包起来，以保证在所有终端中都能正常工作。

## 示例 { #example }

### 创建 { #create-it }

创建文件 `main.py`，内容如下：

```Python
from fastapi import FastAPI

app = FastAPI()


@app.get("/")
def read_root():
    return {"Hello": "World"}