Тепер запустіть команду `fastapi`:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

І відкрийте документацію за адресою [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

  /**
   * Starts the stopwatch.
   *
   * @return this {@code Stopwatch} instance
   * @throws IllegalStateException if the stopwatch is already running.
   */
  @CanIgnoreReturnValue
  public Stopwatch start() {
    checkState(!isRunning, "This stopwatch is already running.");
    isRunning = true;
    startTick = ticker.read();
    return this;
  }

  /**

 * cause the associated test that generated them to itself fail (which JUnit does not otherwise
 * arrange). The rules for creating such tests are:
 *
 * <ol>
 *   <li>All assertions in code running in generated threads must use the forms {@link
 *       #threadUnexpectedException} or {@link #threadRecordFailure} (which is called by {@link
 *       CheckedRunnable} and {@link CheckedCallable}).

    # This avoids the need for compilation and temporary directories

    # Debug logging
    if [ -n "$MAVEN_DEBUG_SCRIPT" ]; then
      echo "[DEBUG] Found jvm.config file at: $1" >&2
      echo "[DEBUG] Running JvmConfigParser with Java: $JAVACMD" >&2
      echo "[DEBUG] Parser arguments: $MAVEN_HOME/bin/JvmConfigParser.java $1 $MAVEN_PROJECTBASEDIR" >&2
    fi

    # Verify Java is available

 * bugs in OpenJDK 6 or higher.
 *
 * @author Kevin Bourrillion
 */
// TODO(cpovirk): consider renaming this class in light of our now running it under newer JDKs.
@AndroidIncompatible // test-suite builders
public class OpenJdk6MapTests extends TestsForMapsInJavaUtil {
  public static Test suite() {
    return new OpenJdk6MapTests().allTests();
  }

Ahora, ejecuta el comando `fastapi`:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

Y abre la documentación en [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

Agora, execute o comando `fastapi`:

<div class="termy">

```console
$ fastapi dev

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

E abra a documentação em [http://127.0.0.1:8000/docs](http://127.0.0.1:8000/docs).

接著在建立 `FastAPI` 應用時使用它。

然後你可以將環境變數 `OPENAPI_URL` 設為空字串，以停用 OpenAPI（包含文件 UI），如下：

<div class="termy">

```console
$ OPENAPI_URL= uvicorn main:app

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

</div>

之後若你造訪 `/openapi.json`、`/docs` 或 `/redoc`，會看到如下的 `404 Not Found` 錯誤：

```JSON
{
    "detail": "Not Found"
}

	while [ -L "$TARGET_FILE" ]; do
		TARGET_FILE=$(env readlink $TARGET_FILE)
		cd $(dirname $TARGET_FILE)
		TARGET_FILE=$(basename $TARGET_FILE)
	done

	# Compute the canonicalized name by finding the physical path
	# for the directory we're in and appending the target file.
	PHYS_DIR=$(pwd -P)
	RESULT=$PHYS_DIR/$TARGET_FILE
	echo $RESULT
}

## FIXME:
## In OSX, 'sort -V' option does not exist, hence

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