@Test
    void verifySendByPost() {
        val service = RegisteredServiceTestUtils.getService(samlRegisteredService.getServiceId());
        service.getAttributes().put(SamlProtocolConstants.PARAMETER_ENTITY_ID, CollectionUtils.wrapList(samlRegisteredService.getServiceId()));

        val result = samlSingleLogoutServiceMessageHandler.handle(service, "ST-1234567890",
            SingleLogoutExecutionRequest.builder().ticketGrantingTicket(new MockTicketGrantingTicket("casuser")).build());
        assertFalse(result.isEmpty());
    }
This is {@link SamlIdPSingleLogoutServiceMessageHandlerTests}.

@author Misagh Moayyed
@since 6.2.0
support/cas-server-support-saml-idp/src/test/java/org/apereo/cas/support/saml/web/idp/profile/slo/SamlIdPSingleLogoutServiceMessageHandlerTests.java