@Test
    void verifyOperationSigned() throws Throwable {
        val clientId = UUID.randomUUID().toString();
        val response = new MockHttpServletResponse();
        val accessToken = getAccessToken(clientId);
        val service = getOidcRegisteredService(clientId);
        service.setUserInfoSigningAlg("RS256");
        service.setSignIdToken(true);
        service.setEncryptIdToken(false);
        servicesManager.save(service);

        val data = oidcUserProfileDataCreator.createFrom(accessToken);
        val entity = oidcUserProfileViewRenderer.render(data, accessToken, response);
        assertNotNull(entity);
        val body = (String) entity.getBody();
        assertNotNull(body);
        val claims = JwtBuilder.parse(body);
        assertNotNull(claims);
        assertEquals("casuser@example.org", ((Map<String, Object>) claims.getClaim("attributes")).get("email"));
        assertEquals("https://sso.example.org/cas/oidc", claims.getIssuer());
    }
This is {@link OidcUserProfileViewRendererDefaultTests}.

@author Misagh Moayyed
@since 6.1.0
support/cas-server-support-oidc/src/test/java/org/apereo/cas/oidc/profile/OidcUserProfileViewRendererDefaultTests.java