assertEquals("Xguest", permissionHelper.decode("Xguest"));
        assertEquals("guest", permissionHelper.decode("guest"));
    }

    @Test
    public void test_encode_withWhitespaceValues() {
        assertNull(permissionHelper.encode("{user}   "));
        assertNull(permissionHelper.encode("{group}\t"));
        assertNull(permissionHelper.encode("{role}\n"));