final String input = "How the s a brown s cow d like A B thing?";
WhitespaceTokenizer wt = new WhitespaceTokenizer(DEFAULT_VERSION, new StringReader(input));
CommonGramsFilter cgf = new CommonGramsFilter(wt, commonWords);
CommonGramsQueryFilter nsf = new CommonGramsQueryFilter(cgf);
CharTermAttribute term = wt.addAttribute(CharTermAttribute.class);
assertTrue(nsf.incrementToken());
assertEquals("How_the", term.toString());
assertTrue(nsf.incrementToken());
assertEquals("the_s", term.toString());