assertTrue(attributes.containsKey("optional_claim"));
        assertNull(attributes.get("optional_claim"));
    }

    @Test
    public void test_parseJwtClaim_arrayValues() throws IOException {
        final String jwtClaim = "{\"roles\":[\"admin\",\"user\"],\"groups\":[\"group1\",\"group2\"]}";
        final Map<String, Object> attributes = new HashMap<>();