@Test
    void verifyOperation() {
        assertNotNull(chainingTemplateViewResolver);
        assertEquals(7, ((ChainingTemplateViewResolver) chainingTemplateViewResolver).getResolvers().size());
        assertNotNull(chainingTemplateViewResolver.resolveTemplate(mock(IEngineConfiguration.class), null, "testTemplate", new HashMap<>()));
    }
Make sure there are 7 template view resolvers.
Two for each template prefix, one for rest url,and one for a theme folder under templates in the
classpath and one for templates in thymeleaf/templates.
support/cas-server-support-thymeleaf/src/test/java/org/apereo/cas/web/view/CasThymeleafConfigurationTests.java