@DisplayName("getUserDomain: derives from KerberosPrincipal in Subject")
        void getUserDomain_fromSubjectPrincipal() {
            Subject subject = new Subject();
            Principal kp = new KerberosPrincipal("******@****.***");
            subject.getPrincipals().add(kp);

            Kerb5Authenticator auth = new Kerb5Authenticator(subject);
            assertEquals("EXAMPLE.COM", auth.getUserDomain());
        }

      to that Work or Derivative Works thereof, that is intentionally
      submitted to Licensor for inclusion in the Work by the copyright owner
      or by an individual or Legal Entity authorized to submit on behalf of
      the copyright owner. For the purposes of this definition, "submitted"
      means any form of electronic, verbal, or written communication sent

      to that Work or Derivative Works thereof, that is intentionally
      submitted to Licensor for inclusion in the Work by the copyright owner
      or by an individual or Legal Entity authorized to submit on behalf of
      the copyright owner. For the purposes of this definition, "submitted"
      means any form of electronic, verbal, or written communication sent

        private final boolean guest;
        private final Subject subject;
        private final boolean failOnRefresh;

        TestCredentials(String domain, boolean anonymous, boolean guest, Subject subject, boolean failOnRefresh) {
            this.domain = domain;
            this.anonymous = anonymous;
            this.guest = guest;
            this.subject = subject;
            this.failOnRefresh = failOnRefresh;
        }

Contributor.

2. GRANT OF RIGHTS

  a) Subject to the terms of this Agreement, each Contributor hereby
  grants Recipient a non-exclusive, worldwide, royalty-free copyright
  license to reproduce, prepare Derivative Works of, publicly display,
  publicly perform, Distribute and sublicense the Contribution of such
  Contributor, if any, and such Derivative Works.

  b) Subject to the terms of this Agreement, each Contributor hereby

            }
            lc.login();

            Subject s = lc.getSubject();
            if (log.isDebugEnabled()) {
                log.debug("Got subject: " + s.getPrincipals());
            }
            if (log.isTraceEnabled()) {
                log.trace("Got subject " + s);
            }

            this.cachedSubject = s;
            return this.cachedSubject;

        Subject presetSubject = new Subject();
        orig.setSubject(presetSubject);

        // Try to get a Subject, but handle the case where JAAS may not be configured
        Subject first = orig.getSubject();
        // In test environments, getSubject() may return null if JAAS is not configured
        // This is acceptable behavior - the test should focus on the cloning logic

        // Clone and verify basic fields copied

      to that Work or Derivative Works thereof, that is intentionally
      submitted to Licensor for inclusion in the Work by the copyright owner
      or by an individual or Legal Entity authorized to submit on behalf of
      the copyright owner. For the purposes of this definition, "submitted"
      means any form of electronic, verbal, or written communication sent

      to that Work or Derivative Works thereof, that is intentionally
      submitted to Licensor for inclusion in the Work by the copyright owner
      or by an individual or Legal Entity authorized to submit on behalf of
      the copyright owner. For the purposes of this definition, "submitted"
      means any form of electronic, verbal, or written communication sent

    }

    @Override
    public NavigableSet<E> subSet(
        @ParametricNullness E fromElement,
        boolean fromInclusive,
        @ParametricNullness E toElement,
        boolean toInclusive) {
      return forward.subSet(toElement, toInclusive, fromElement, fromInclusive).descendingSet();
    }

    @Override
    public SortedSet<E> subSet(@ParametricNullness E fromElement, @ParametricNullness E toElement) {