@Test
    void verifySigValidationFilter() {
        val filter = SamlUtils.buildSignatureValidationFilter(applicationContext, "classpath:metadata/idp-signing.crt");
        assertNotNull(filter);
    }
This is {@link SamlIdPConfigurationTests}.

@author Misagh Moayyed
@since 5.1.0
support/cas-server-support-saml-idp/src/test/java/org/apereo/cas/support/saml/SamlIdPConfigurationTests.java