// nothing to drain, thus this should wait doing nothing
    try {
      assertEquals(0, Queues.drain(q, ImmutableList.of(), 0, 10, MILLISECONDS));
    } catch (InterruptedException e) {
      throw new AssertionError();
    }

    // but does the wait actually occurs?
    @SuppressWarnings("unused") // https://errorprone.info/bugpattern/FutureReturnValueIgnored

    private DummyInternalEntry() {
      throw new AssertionError();
    }

    @Override
    public DummyInternalEntry getNext() {
      throw new AssertionError();
    }

    @Override
    public int getHash() {
      throw new AssertionError();
    }

    @Override
    public Object getKey() {
      throw new AssertionError();
    }

    @Override

  }

  private static MessageDigest getMessageDigest(String algorithmName) {
    try {
      return MessageDigest.getInstance(algorithmName);
    } catch (NoSuchAlgorithmException e) {
      throw new AssertionError(e);
    }
  }

  @Override
  public Hasher newHasher() {
    if (supportsClone) {
      try {
        return new MessageDigestHasher((MessageDigest) prototype.clone(), bytes);

        BigInteger x2 = x.pow(2);
        int logX2Floor = x2.bitLength() - 1;
        return (logX2Floor < 2 * logFloor + 1) ? logFloor : logFloor + 1;
    }
    throw new AssertionError();
  }

  /*
   * The maximum number of bits in a square root for which we'll precompute an explicit half power
   * of two. This can be any value, but higher values incur more class load time and linearly

              @Override
              public void run() {
                try {
                  unit.sleep(time);
                } catch (InterruptedException wontHappen) {
                  throw new AssertionError(wontHappen);
                }
                interruptee.interrupt();
              }
            })
        .start();
  }

  static void repeatedlyInterruptTestThread(

      join();
    } catch (ReflectiveOperationException e) {
      // stop() threw or did not exist. Don't join() the thread, which might hang forever.
    }

    if (uncaughtThrowable != null) {
      throw new AssertionError("Uncaught throwable in " + getName(), uncaughtThrowable);
    }
  }

  /**
   * Causes this thread to call the named void method, and asserts that the call returns normally.
   */

              called = true;
            }
          }
        };
    addCallback(f, callback, directExecutor());
    f.cancel(true);
  }

  public void testThrowErrorFromGet() {
    Error error = new AssertionError("ASSERT!");
    ListenableFuture<String> f = UncheckedThrowingFuture.throwingError(error);
    MockCallback callback = new MockCallback(error);
    addCallback(f, callback, directExecutor());
  }

              public Integer call() throws Exception {
                enterLatch.countDown();
                try {
                  new CountDownLatch(1).await(); // wait forever
                  throw new AssertionError();
                } catch (InterruptedException e) {
                  interruptedExceptionThrown.set(true);
                  throw e;
                } finally {
                }
              }

    } catch (AssertionError expected) {
      return;
    }
    fail();
  }

  public void testAssertSubtypeTokenBeforeSupertypeToken_duplicate() {
    try {
      assertSubtypeTokenBeforeSupertypeToken(
          ImmutableList.of(TypeToken.of(String.class), TypeToken.of(String.class)));
    } catch (AssertionError expected) {
      return;
    }
    fail();
  }

  }

  private static MessageDigest getMessageDigest(String algorithmName) {
    try {
      return MessageDigest.getInstance(algorithmName);
    } catch (NoSuchAlgorithmException e) {
      throw new AssertionError(e);
    }
  }

  @Override
  public Hasher newHasher() {
    if (supportsClone) {
      try {
        return new MessageDigestHasher((MessageDigest) prototype.clone(), bytes);