public void test_convertJa() {
        List<String> results = converter.convert("ジャ", null);
        assertTrue(results.contains("zya"));
        assertTrue(results.contains("ja"));
        assertTrue(results.contains("jya"));
    }

    public void test_convertModernKatakana_Wi() {
        List<String> results = converter.convert("ウィ", null);
        assertTrue(results.contains("wi"));
    }

        map.put("ギュ", new String[] { "gyu" });
        map.put("ギョ", new String[] { "gyo" });
        map.put("ギェ", new String[] { "gye" });

        map.put("ジャ", new String[] { "zya", "ja", "jya" });
        map.put("ジュ", new String[] { "zyu", "ju", "jyu" });
        map.put("ジョ", new String[] { "zyo", "jo", "jyo" });
        map.put("ジェ", new String[] { "zye", "je", "jye" });