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

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

    public void test_normalize_null() {
        String enc;

        enc = null;
        assertNull(encodingHelper.normalize(enc));

        enc = "";
        assertNull(encodingHelper.normalize(enc));

        enc = " ";