@Test
    void verifyOperation() {
        val input = new UniquePrincipalRequiredException();
        assertNotNull(input.getCode());

    }
This is {@link UniquePrincipalRequiredExceptionTests}.

@author Misagh Moayyed
@since 6.3.0
core/cas-server-core-authentication-api/src/test/java/org/apereo/cas/authentication/exceptions/UniquePrincipalRequiredExceptionTests.java