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"));
    }