assertThat(ArrayUtil.addAll(emptyArray, null), is(sameInstance(emptyArray)));
        assertThat(ArrayUtil.addAll(emptyArray, null), is(sameInstance(emptyArray)));
        assertThat(ArrayUtil.addAll(emptyArray, emptyArray), is(sameInstance(emptyArray)));
        assertThat(ArrayUtil.addAll(emptyArray, array), is(sameInstance(array)));
        assertThat(ArrayUtil.addAll(array, emptyArray), is(sameInstance(array)));
    }

    /**

        assertThat(option.prefix(BeanNames.search_()), is(sameInstance(option)));
        assertThat(option.prefix, is("search_"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testBeanDelimiter() throws Exception {
        final CopyOptions option = new CopyOptions();
        assertThat(option.beanDelimiter('#'), is(sameInstance(option)));
        assertThat(option.beanDelimiter, is('#'));
    }