Thread.currentThread().interrupt();
                        } finally {
                            endLatch.countDown();
                        }
                    });
                }

                startLatch.countDown(); // Start all threads simultaneously
                assertTrue("Concurrent registration timed out", endLatch.await(10, TimeUnit.SECONDS));

    @Override
    public void run() {
      assertTrue("Listener called before it was expected", expectCall);
      assertFalse("Listener called more than once", wasCalled());
      calledCountDown.countDown();
    }

    void expectCall() {
      assertFalse("expectCall is already true", expectCall);
      expectCall = true;
    }

    boolean wasCalled() {
      return calledCountDown.getCount() == 0;
    }

          e: IOException,
        ) {
          exceptionRef.set(e)
          latch.countDown()
        }

        @Throws(IOException::class)
        override fun onResponse(
          call: Call,
          response: Response,
        ) {
          response.close()
          latch.countDown()
        }
      },
    )
    latch.await()
    assertThat(call.isCanceled()).isTrue()

            () -> {
              enterLatch.countDown();
              new CountDownLatch(1).await(); // wait forever
              return immediateFuture(null);
            });
    assertFalse(task.isDone());
    Thread thread =
        new Thread(
            () -> {
              try {
                task.run();
              } finally {
                exitLatch.countDown();
              }
            },

                        startLatch.await();
                        response.received();
                        endLatch.countDown();
                    } catch (InterruptedException e) {
                        // Ignore
                    }
                }).start();
            }

            startLatch.countDown();
            assertTrue(endLatch.await(1, TimeUnit.SECONDS));
            assertTrue(response.isReceived());

                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                } finally {
                    endLatch.countDown();
                }
            });
        }

        startLatch.countDown(); // Start all threads
        assertTrue(endLatch.await(30, TimeUnit.SECONDS), "All threads should complete within timeout");
        executor.shutdown();

        cache.getUnchecked(getKey);
        getFinishedSignal.countDown();
      }
    }.start();
    new Thread() {
      @Override
      public void run() {
        cache.refresh(refreshKey);
        getFinishedSignal.countDown();
      }
    }.start();

    // let computation complete
    letGetFinishSignal.countDown();
    getFinishedSignal.await();
    checkNothingLogged();

    CountDownLatch gotException = new CountDownLatch(1);
    AsyncFunction<String, String> function =
        unused -> {
          inFunction.countDown();
          try {
            shouldCompleteFunction.await();
          } catch (InterruptedException expected) {
            gotException.countDown();
            throw expected;
          }
          return immediateFuture("a");
        };

    CountDownLatch gotException = new CountDownLatch(1);
    AsyncFunction<String, String> function =
        unused -> {
          inFunction.countDown();
          try {
            shouldCompleteFunction.await();
          } catch (InterruptedException expected) {
            gotException.countDown();
            throw expected;
          }
          return immediateFuture("a");
        };

    @Override
    public void run() {
      assertTrue("Listener called before it was expected", expectCall);
      assertFalse("Listener called more than once", wasCalled());
      calledCountDown.countDown();
    }

    void expectCall() {
      assertFalse("expectCall is already true", expectCall);
      expectCall = true;
    }

    boolean wasCalled() {
      return calledCountDown.getCount() == 0;
    }