// (which will block) in the same thread.
    new Thread() {
      @Override
      public void run() {
        inputFuture.set(SLOW_FUNC_VALID_INPUT_DATA);
      }
    }.start();
    funcIsWaitingLatch.await();

    assertTrue(resultFuture.cancel(true));
    assertTrue(resultFuture.isCancelled());
    assertFalse(inputFuture.isCancelled());
    assertFalse(outputFuture.isCancelled());

    // (which will block) in the same thread.
    new Thread() {
      @Override
      public void run() {
        inputFuture.set(SLOW_FUNC_VALID_INPUT_DATA);
      }
    }.start();
    funcIsWaitingLatch.await();

    assertTrue(resultFuture.cancel(true));
    assertTrue(resultFuture.isCancelled());
    assertFalse(inputFuture.isCancelled());
    assertFalse(outputFuture.isCancelled());

8. 注意，*路径操作函数*使用的是普通函数，不是异步函数；

    与往常一样，在 FastAPI 中，可以按需组合普通函数与异步函数；

    如果不清楚何时使用异步函数或普通函数，请参阅**急不可待？**一节中对 <a href="https://fastapi.tiangolo.com/async/#in-a-hurry" target="_blank" class="internal-link">`async` 与 `await`</a> 的说明；

9. *路径操作函数*返回的不是数据类（虽然它可以返回数据类），而是返回内含数据的字典列表；

    FastAPI 使用（包含数据类的） `response_model` 参数转换响应。

把 `dataclasses` 与其它类型注解组合在一起，可以组成不同形式的复杂数据结构。

更多内容详见上述代码内的注释。

## 深入学习

{* ../../docs_src/app_testing/tutorial001_py39.py hl[2,12,15:18] *}

/// tip

Notice that the testing functions are normal `def`, not `async def`.

And the calls to the client are also normal calls, not using `await`.

This allows you to use `pytest` directly without complications.

///

/// note | Technical Details

You could also use `from starlette.testclient import TestClient`.

                } catch (Exception e) {
                    exception.set(e);
                } finally {
                    latch.countDown();
                }
            });
        }

        latch.await(30, TimeUnit.SECONDS);
        executor.shutdown();

        if (exception.get() != null) {
            throw exception.get();
        }
    }

{* ../../docs_src/app_testing/tutorial001.py hl[2,12,15:18] *}


/// tip | Порада

Зверніть увагу, що тестові функції — це звичайні `def`, а не `async def`.

Виклики клієнта також звичайні, без використання `await`.

Це дозволяє використовувати `pytest` без зайвих ускладнень.

///

/// note | Технічні деталі

Ви також можете використовувати `from starlette.testclient import TestClient`.

          fail("")
        }
      },
    )
    assertThat(server.takeRequest().exchangeIndex)
      .isEqualTo(expectedSequenceNumber)
    responseDequeuedLatch!!.await()
    call.cancel()
    requestCanceledLatch!!.countDown()
    latch.await()
  }

  @Test
  fun noRecoveryFromRefusedStreamWithRetryDisabled() {
    noRecoveryFromErrorWithRetryDisabled(ErrorCode.REFUSED_STREAM)
  }

  @Test

	}
	for i, testCase := range testCases {
		if _, s3Error := checkAdminRequestAuth(ctx, testCase.Request, policy.AllAdminActions, globalSite.Region()); s3Error != testCase.ErrCode {
			t.Errorf("Test %d: Unexpected s3error returned wanted %d, got %d", i, testCase.ErrCode, s3Error)
		}
	}
}

func TestValidateAdminSignature(t *testing.T) {
	ctx, cancel := context.WithCancel(t.Context())
	defer cancel()

	expected := false
	if locked != expected {
		t.Errorf("TestDualWriteLockTimedOut(): \nexpected %#v\ngot      %#v", expected, locked)
	}
}

// Test cases below are copied 1 to 1 from sync/rwmutex_test.go (adapted to use LRWMutex)

// Borrowed from rwmutex_test.go
func parallelReader(ctx context.Context, m *LRWMutex, clocked, cunlock, cdone chan bool) {
	if m.GetRLock(ctx, "", "", time.Second) {
		clocked <- true
		<-cunlock

          if (comparator == null) {
            // A sorted spliterator with no comparator is already using natural order.
            // (We could probably find a way to avoid rawtypes here if we wanted.)
            @SuppressWarnings({"unchecked", "rawtypes"})
            Comparator<? super E> naturalOrder =
                (Comparator<? super E>) Comparator.<Comparable>naturalOrder();
            comparator = naturalOrder;