/**
     * @throws Exception
     */
    @Test
    public void testIndexOf() throws Exception {
        final String[] array = new String[] { "111", "222", "333", "222" };
        assertThat(ArrayUtil.indexOf(array, "222"), is(1));
        assertThat(ArrayUtil.indexOf(array, "222", 2), is(3));
        assertThat(ArrayUtil.indexOf(array, new Object()), is(-1));
        assertThat(ArrayUtil.indexOf(array, null), is(-1));