@Test
public void testValidateOUFieldCheckInvalidOU() throws IOException {

    // multiple ou field: Athenz and Yahoo which we don't support
    Path path = Paths.get("src/test/resources/athenz.multiple_ou.csr");
    String csr = new String(Files.readAllBytes(path));
    X509CertRequest certReq = new X509CertRequest(csr);
    assertNotNull(certReq);
    assertFalse(certReq.validateSubjectOUField("Athenz", null, null));
    assertFalse(certReq.validateSubjectOUField("Yahoo", null, null));
}