map.put("aaa_bbb_ccc", "333");
        map.put("ccc.ddd", "444");
        return new ParamMap<>(map);
    }

    private ParamMap<Object, Object> createCamelMap() {
        final Map<Object, Object> map = new HashMap<>();
        map.put("aaa", "111");
        map.put("aaaBbb", "222");
        map.put("aaaBbbCcc", "333");
        map.put("ccc.ddd", "444");
        return new ParamMap<>(map);
    }

        Iterator<String> i = lru.keySet().iterator();
        assertThat(i.next(), is("bbb"));
        assertThat(i.next(), is("ccc"));
        assertThat(i.next(), is("aaa"));
        lru.put("ddd", "444");
        assertThat(lru.size(), is(3));
        assertThat(lru.get("bbb"), is(nullValue()));
        i = lru.keySet().iterator();
        assertThat(i.next(), is("ccc"));
        assertThat(i.next(), is("aaa"));

    }

    public void test_filterJvmOptions() {
        final String[] args = new String[] { //
                "-X111", //
                "8:-X222", //
                "10:-X333", //
                "11:-X444", //
                "8-:-X555", //
                "10-:-X666", //
                "11-:-X777", //
                "12-:-X888", //
                "-X999",//
        };

     */
    @Test
    public void testRemoveNothing() throws Exception {
        final String[] array = new String[] { "111", "222", "333" };
        final String[] newArray = ArrayUtil.remove(array, "444");
        assertThat(newArray, is(sameInstance(array)));
    }

    /**
     *
     */
    @Test
    public void testIsEmpty() {
        assertTrue(ArrayUtil.isEmpty((Object[]) null));