SomeUncheckedException sue = new SomeUncheckedException();
    IllegalArgumentException iae = new IllegalArgumentException(sue);
    RuntimeException re = new RuntimeException(iae);
    IllegalStateException ex = new IllegalStateException(re);

    assertThat(getCausalChain(ex)).containsExactly(ex, re, iae, sue).inOrder();
    assertThat(Iterables.getOnlyElement(getCausalChain(sue))).isSameInstanceAs(sue);

      invokeAnyImpl(e, null, false, 0, NANOSECONDS);
      fail();
    } catch (NullPointerException success) {
    } finally {
      joinPool(e);
    }
  }

  /** invokeAny(empty collection) throws IAE */
  public void testInvokeAnyImpl_emptyTasks() throws Exception {
    ListeningExecutorService e = newDirectExecutorService();
    try {
      invokeAnyImpl(e, new ArrayList<Callable<String>>(), false, 0, NANOSECONDS);