}

    public void test_convertModernKatakana_Di() {
        List<String> results = converter.convert("ディ", null);
        assertTrue(results.contains("di"));
        assertTrue(results.contains("dhi"));
    }

    public void test_convertModernKatakana_Dyu() {
        List<String> results = converter.convert("デュ", null);
        assertTrue(results.contains("dyu"));
    }

        map.put("デ", new String[] { "de" });
        map.put("ド", new String[] { "do" });

        map.put("ティ", new String[] { "ti", "thi" });
        map.put("ディ", new String[] { "di", "dhi" });
        map.put("デュ", new String[] { "dyu" });
        map.put("トゥ", new String[] { "tu", "twu" });
        map.put("ドゥ", new String[] { "du", "dwu" });

        map.put("バ", new String[] { "ba" });