@Test
    void testReferral() {
        String referral = "throw";
        factory.setReferral(referral);
        assertEquals(referral, factory.getReferral());
    }
This is the only test that does not fake the JNDI environment.  It is provided for 100% test coverage.

@throws NamingException thrown because the host is always broken.
core/src/test/java/org/apache/shiro/realm/ldap/JndiLdapContextFactoryTest.java