* be a SynchronousQueue.
   */
  private ExecutorService threadPool;

  @Override
  public void setUp() {
    threadPool = newCachedThreadPool();
  }

  @Override
  public void tearDown() throws InterruptedException {
    threadPool.shutdown();
    assertTrue("Some worker didn't finish in time", threadPool.awaitTermination(10, SECONDS));
  }

  private static <T> int drain(
      BlockingQueue<T> q,

    @BeforeAll
    static void setUp() {
        MessageUtils.setColorEnabled(false);
    }

    @AfterAll
    static void tearDown() {
        MessageUtils.setColorEnabled(true);
    }

    @BeforeEach
    void beforeEach() {
        logger = mock(Logger.class);
        when(logger.isInfoEnabled()).thenReturn(true);

  @RegisterExtension
  val clientTestRule = OkHttpClientTestRule()

  private var server: MockWebServer? = null

  @BeforeEach fun setUp(server: MockWebServer?) {
    this.server = server
  }

  @AfterEach fun tearDown() {
    ProxySelector.setDefault(DEFAULT_PROXY_SELECTOR)
    CookieManager.setDefault(DEFAULT_COOKIE_HANDLER)
    ResponseCache.setDefault(DEFAULT_RESPONSE_CACHE)
  }

  @Test fun durationDefaults() {

    call =
      clientTestRule.newClient().newCall(
        Request.Builder()
          .url("https://$uriHost:$uriPort/")
          .build(),
      ) as RealCall
  }

  @AfterEach fun tearDown() {
    factory.close()
  }

  @Test fun singleRoute() {
    val address = factory.newAddress()
    val routeSelector = newRouteSelector(address)
    assertThat(routeSelector.hasNext()).isTrue()

  @BeforeEach
  fun setUp(server: MockWebServer) {
    this.server = server
    platform.assumeNotOpenJSSE()
    platform.assumeHttp2Support()
  }

  @AfterEach
  fun tearDown() {
    executorService.shutdown()
  }

  @Test
  @Throws(IOException::class)
  fun http1DoesntSupportDuplex() {
    val call =
      client.newCall(
        Request.Builder()

# 使用yield的依赖项

FastAPI支持在完成后执行一些<abbr title='有时也被称为"退出"("exit")，"清理"("cleanup")，"拆卸"("teardown")，"关闭"("close")，"上下文管理器"("context managers")。 ...'>额外步骤</abbr>的依赖项.

为此，你需要使用 `yield` 而不是 `return`，然后再编写这些额外的步骤（代码）。

/// tip | 提示

确保在每个依赖中只使用一次 `yield`。

///

/// note | "技术细节"

任何一个可以与以下内容一起使用的函数：

  private val addressB = factory.newAddress("b")
  private val routeB1 = factory.newRoute(addressB)
  private val addressC = factory.newAddress("c")
  private val routeC1 = factory.newRoute(addressC)

  @AfterEach fun tearDown() {
    factory.close()
    peer.close()
  }

  @Test fun connectionsEvictedWhenIdleLongEnough() {
    val pool = factory.newConnectionPool()
    val c1 = factory.newConnection(pool, routeA1, 50L)

        startJob(NAME_PREFIX);

        waitJob(NAME_PREFIX);
        refresh();
    }

    @BeforeEach
    protected void init() {
        refresh();
    }

    @AfterEach
    protected void tearDown() {
    }

    @AfterAll
    protected static void tearDownAll() {
        deleteDocuments("label:" + CRAWL_LABEL);
        deleteLabel(labelId);
        deleteLabel(crawlLabelId);

    serializer = ExecutionSequencer.create();
    firstFuture = SettableFuture.create();
    firstCallable = new TestCallable(firstFuture);
  }

  @Override
  public void tearDown() throws Exception {
    executor.shutdown();
  }

  public void testCallableStartsAfterFirstFutureCompletes() {
    @SuppressWarnings({"unused", "nullness"})

  }

  private Path tempDir;

  @Override
  protected void setUp() throws Exception {
    tempDir = Files.createTempDirectory("MoreFilesTest");
  }

  @Override
  protected void tearDown() throws Exception {
    if (tempDir != null) {
      // delete tempDir and its contents
      Files.walkFileTree(
          tempDir,
          new SimpleFileVisitor<Path>() {
            @Override