@Test
public void testCorsRegistration() {

    Mockito.when(mockCorsRegistration.allowedOrigins(SystemConfig.CORS_ALLOWED_ORIGINS))
        .thenReturn(mockCorsRegistration);
    Mockito.when(mockCorsRegistry.addMapping(SystemConfig.CORS_MAPPING)).thenReturn(mockCorsRegistration);
    Mockito
        .when(mockCorsRegistration
            .allowedMethods(RequestMethod.GET.name(), RequestMethod.POST.name(), RequestMethod.PUT.name()))
        .thenReturn(mockCorsRegistration);
    Mockito.when(mockCorsRegistration.allowedHeaders("*")).thenReturn(mockCorsRegistration);
    Mockito.when(mockCorsRegistration.exposedHeaders(JwtFilter.HEADER_CLAIMS, JwtFilter.HEADER_CLAIMS_SUBJECT))
        .thenReturn(mockCorsRegistration);
    final WebMvcConfigurer configurer = systemConfig.corsConfigurer();
    configurer.addCorsMappings(mockCorsRegistry);
    Mockito.verify(mockCorsRegistry).addMapping(SystemConfig.CORS_MAPPING);
    Mockito.verify(mockCorsRegistration).allowedOrigins(SystemConfig.CORS_ALLOWED_ORIGINS);
    Mockito.verify(mockCorsRegistration)
        .allowedMethods(RequestMethod.GET.name(), RequestMethod.POST.name(), RequestMethod.PUT.name());
    Mockito.verify(mockCorsRegistration).allowedHeaders("*");
    Mockito.verify(mockCorsRegistration).exposedHeaders(JwtFilter.HEADER_CLAIMS, JwtFilter.HEADER_CLAIMS_SUBJECT);
}