assertThat(ArrayUtil.contains(new Object[] { null }, null), is(true));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testContains_character() throws Exception {
        assertThat(ArrayUtil.contains(new char[] { '1', '2' }, '1'), is(true));
        assertThat(ArrayUtil.contains(new char[] { '1' }, '2'), is(not(true)));