@Test
 public void shouldValidateCertWithApprovedCriticalExtentions() throws Exception {
   CriticalExtensionRequiredRule validator = CriticalExtensionRule.requires("2.10.2");
   X509Certificate cert =
       createX509Certificate(
           new X509ExtensionCustom() {
             public void setup(X509v3CertificateBuilder v3CertGen) throws CertIOException {
               v3CertGen.addExtension(new ASN1ObjectIdentifier("2.10.2"), true, new byte[3]);
             }
           });
   validator.validate(cert);
 }
 @Test(expectedExceptions = FailedValidationException.class)
 public void shouldInvalidateCertWithACriticalExtentionsThatIsNotApproved() throws Exception {
   String approvedExtentionList = "2.10.2";
   CriticalExtensionRequiredRule validator = CriticalExtensionRule.requires(approvedExtentionList);
   X509Certificate cert =
       createX509Certificate(
           new X509ExtensionCustom() {
             public void setup(X509v3CertificateBuilder v3CertGen) throws CertIOException {
               String notApprovedExtention = "2.10.6";
               boolean CRITICAL = true;
               v3CertGen.addExtension(
                   new ASN1ObjectIdentifier(notApprovedExtention), CRITICAL, new byte[3]);
             }
           });
   validator.validate(cert);
 }