}

  public void testRemovalListener_setTwice() {
    RemovalListener<Object, Object> testListener = nullRemovalListener();
    CacheBuilder<Object, Object> builder = CacheBuilder.newBuilder().removalListener(testListener);
    assertThrows(IllegalStateException.class, () -> builder.removalListener(testListener));
  }

  public void testValuesIsNotASet() {

    }
  }

  public void testSetRemovalListener() {
    RemovalListener<Object, Object> testListener = TestingRemovalListeners.nullRemovalListener();
    LocalCache<Object, Object> map =
        makeLocalCache(createCacheBuilder().removalListener(testListener));
    assertSame(testListener, map.removalListener);
  }

  public void testSetTicker() {
    Ticker testTicker =
        new Ticker() {

    }
  }

  public void testSetRemovalListener() {
    RemovalListener<Object, Object> testListener = TestingRemovalListeners.nullRemovalListener();
    LocalCache<Object, Object> map =
        makeLocalCache(createCacheBuilder().removalListener(testListener));
    assertSame(testListener, map.removalListener);
  }

  public void testSetTicker() {
    Ticker testTicker =
        new Ticker() {