}
      }
    }
  }

  /** A guard that encapsulates a simple, mutable boolean flag. */
  static class FlagGuard extends Monitor.Guard {

    private boolean satisfied;

    protected FlagGuard(Monitor monitor) {
      super(monitor);
    }

    @Override
    public boolean isSatisfied() {
      return satisfied;
    }

    public void setSatisfied(boolean satisfied) {

      @Override
      protected void runTest() throws Throwable {
        Monitor monitor = new Monitor(fair);
        FlagGuard guard = new FlagGuard(monitor);
        Object[] arguments =
            (timed ? new Object[] {guard, 0L, TimeUnit.MILLISECONDS} : new Object[] {guard});
        try {
          method.invoke(monitor, arguments);
          fail("expected IllegalMonitorStateException");