enc = "Shift_JIS";
        assertEquals("Shift_JIS", encodingHelper.normalize(enc));

        enc = "S-JIS";
        assertEquals("S-JIS", encodingHelper.normalize(enc));
    }

    public void test_normalize_map() {
        String enc;

        encodingHelper.addEncodingMapping("S-JIS", "Shift_JIS");

        enc = "UTF-8";
        assertEquals("UTF-8", encodingHelper.normalize(enc));

        enc = "Shift_JIS";