    @Test
    public void filterMergeKeep()
    {

        List<String> keep = Arrays.asList(new String [] {"v4"});

        List<ResponseValue> actual = ResponseUtility.filterMergeResults(values, keep, 2, SortType.foreground_popularity);

        assertEquals(2, actual.size());
        assertEquals("v1", actual.get(0).value);
        assertEquals("v4", actual.get(1).value);
    }