public void testStart_failed() {
    Exception exception = new Exception("deliberate");
    TestService service =
        new TestService() {
          @Override
          protected void startUp() throws Exception {
            super.startUp();
            throw exception;
          }
        };
    assertEquals(0, service.startUpCalled);
    RuntimeException e =

  <application>
    <provider
      android:name="androidx.startup.InitializationProvider"
      android:authorities="${applicationId}.androidx-startup"
      android:exported="false"
      tools:node="merge">
      <meta-data android:name="okhttp3.internal.platform.PlatformInitializer"
                 android:value="androidx.startup"/>
    </provider>
  </application>

# Events testen: Lifespan und Startup – Shutdown { #testing-events-lifespan-and-startup-shutdown }

Wenn Sie `lifespan` in Ihren Tests ausführen müssen, können Sie den `TestClient` mit einer `with`-Anweisung verwenden:

{* ../../docs_src/app_testing/tutorial004_py39.py hl[9:15,18,27:28,30:32,41:43] *}

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.platform

import android.content.Context
import androidx.startup.Initializer

/**
 * Androidx Startup initializer to ensure that the AndroidPlatform has access to the application context.
 */
class PlatformInitializer : Initializer<Platform> {
  override fun create(context: Context): Platform {

    CountDownLatch started = new CountDownLatch(1);
    FakeService service =
        new FakeService() {
          @Override
          protected void startUp() throws Exception {
            super.startUp();
            started.await();
          }
        };
    service.startAsync();
    service.stopAsync();
    started.countDown();
    service.awaitTerminated();

### Run Automatically on Startup { #run-automatically-on-startup }

In general, you will probably want the server program (e.g. Uvicorn) to be started automatically on server startup, and without needing any **human intervention**, to have a process always running with your API (e.g. Uvicorn running your FastAPI app).

    def main() -> dict[str, str]:
        return {"message": "Hello World"}

    @app.on_event("startup")
    def app_startup() -> None:
        state.app_startup = True

    @app.on_event("shutdown")
    def app_shutdown() -> None:
        state.app_shutdown = True

    router = APIRouter()

    @router.on_event("startup")
    def router_startup() -> None:
        state.router_startup = True

配置**启动**和**关闭**事件的推荐方法是使用 `FastAPI()` 应用的 `lifespan` 参数，如前所示。如果你提供了一个 `lifespan` 参数，启动（`startup`）和关闭（`shutdown`）事件处理器将不再生效。要么使用 `lifespan`，要么配置所有事件，两者不能共用。

你可以跳过这一部分。

///

有一种替代方法可以定义在**启动**和**关闭**期间执行的逻辑。

**FastAPI** 支持定义在应用启动前，或应用关闭时执行的事件处理器（函数）。

事件函数既可以声明为异步函数（`async def`），也可以声明为普通函数（`def`）。

### `startup` 事件

使用 `startup` 事件声明 `app` 启动前运行的函数：

{* ../../docs_src/events/tutorial001.py hl[8] *}

<span style="color: green;">INFO</span>:     Started server process [28722]
<span style="color: green;">INFO</span>:     Waiting for application startup.
<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

**ДУЖЕ радимо** написати або скопіювати код, відредагувати його та запустити локально.

# Testando eventos: lifespan e inicialização - encerramento { #testing-events-lifespan-and-startup-shutdown }

Quando você precisa que o `lifespan` seja executado em seus testes, você pode utilizar o `TestClient` com a instrução `with`:

{* ../../docs_src/app_testing/tutorial004_py39.py hl[9:15,18,27:28,30:32,41:43] *}