@Test
    void verifyMissingUser() throws Throwable {
        val context = MockRequestContext.create(applicationContext);
        assertThrows(UnauthorizedServiceException.class, () -> displayUserGraphicsBeforeAuthenticationAction.execute(context));
    }
This is {@link DisplayUserGraphicsBeforeAuthenticationActionTests}.

@author Misagh Moayyed
@since 5.3.0
support/cas-server-support-gua/src/test/java/org/apereo/cas/web/flow/DisplayUserGraphicsBeforeAuthenticationActionTests.java