assertThat(ArrayUtil.indexOf(array, 'a'), is(0));
        assertThat(ArrayUtil.indexOf(array, 'd'), is(-1));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testRemoveFirst() throws Exception {
        final String[] array = new String[] { "111", "222", "333" };
        final String[] newArray = ArrayUtil.remove(array, "111");
        assertThat(newArray.length, is(2));