});
    thread.start();

    boolean done = doneSignal.await(1, TimeUnit.SECONDS);
    if (!done) {
      StringBuilder builder = new StringBuilder();
      for (StackTraceElement trace : thread.getStackTrace()) {
        builder.append("\tat ").append(trace).append('\n');
      }
      fail(builder.toString());
    }
  }

  /**

      // where the immediateCancelledFuture() call was made.
      List<StackTraceElement> stackTrace = ImmutableList.copyOf(expected.getStackTrace());
      assertFalse(Iterables.any(stackTrace, hasClassName(CallerClass1.class)));
      assertTrue(Iterables.any(stackTrace, hasClassName(CallerClass2.class)));