@Before
    public void before() {
        // mocking
        this.kerberosAuthenticator = mock(KerberosAuthenticator.class);
        this.krbValidator = mock(KerberosTicketValidator.class);
    }
Tests the Kerberos client with mocked Kerberos authenticator/validator (i.e. no real tickets used)

@author Garry Boyce
@author Vidmantas Zemleris
@since 2.1.0
pac4j-kerberos/src/test/java/org/pac4j/kerberos/client/direct/KerberosClientTests.java