If you're talking about the Sample tests, maybe you edited it? Click Reset of change it manually.

Are you sure about that? I've tried your current Java code and it worked.

This is the fixed test with that input:

    @Test
    public void test5() {
        List<String> a =  new ArrayList<String>();
        a.add(":)"); a.add(":)"); a.add("x-]"); a.add(":ox"); a.add(";-("); a.add(";-)"); a.add(";~("); a.add(":~D");
        assertEquals(4, SmileFaces.countSmileys(a));
    }

And you can see the expected answer is 4 there.