    @Test
    public void testJoinStringsWith2CharDelimiter() throws Exception {


        String string1 = "a";
        String string2 = "story";
        String string3 = "about";
        String string4 = "tests";
        String delim = "--";

        ArrayList<String> strings = new ArrayList<String>(3);
        strings.add(string1);
        strings.add(string2);
        strings.add(string3);
        strings.add(string4);

        String expected = string1 + delim + string2 + delim + string3 + delim + string4;
        assertEquals("Strings get concatenated with 2-char-delimiter", expected, StringUtils.join(strings, delim));

    }