https://jira.baeldung.com/browse/BAEL-6223

2023-02-16 08:47:54 -10:00
parent 416dc0492d
commit b4d18fd227
17 changed files with 1300 additions and 0 deletions
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>com.baeldung</groupId>
+		<artifactId>spring-security-oauth2-testing</artifactId>
+		<version>0.0.1-SNAPSHOT</version>
+	</parent>
+	<groupId>com.baeldung.spring-security-modules.testing</groupId>
+	<artifactId>reactive-resource-server</artifactId>
+	<name>reactive-resource-server</name>
+	<description>Demo project for Spring Boot reactive resource-server</description>
+	<properties>
+		<java.version>17</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-oauth2-resource-server</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-webflux</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>com.c4-soft.springaddons</groupId>
+			<artifactId>spring-addons-oauth2-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<excludes>
+						<exclude>
+							<groupId>org.projectlombok</groupId>
+							<artifactId>lombok</artifactId>
+						</exclude>
+					</excludes>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+</project>
@@ -0,0 +1,124 @@
+package com.baeldung;
+
+import java.nio.charset.Charset;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.core.io.buffer.DataBufferUtils;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.access.prepost.PreAuthorize;
+import org.springframework.security.authentication.AnonymousAuthenticationToken;
+import org.springframework.security.authentication.AuthenticationCredentialsNotFoundException;
+import org.springframework.security.config.annotation.method.configuration.EnableReactiveMethodSecurity;
+import org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity;
+import org.springframework.security.config.web.server.ServerHttpSecurity;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.core.context.ReactiveSecurityContextHolder;
+import org.springframework.security.oauth2.core.oidc.StandardClaimNames;
+import org.springframework.security.oauth2.jwt.Jwt;
+import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken;
+import org.springframework.security.web.server.SecurityWebFilterChain;
+import org.springframework.security.web.server.context.NoOpServerSecurityContextRepository;
+import org.springframework.stereotype.Service;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import lombok.RequiredArgsConstructor;
+import reactor.core.publisher.Mono;
+
+@SpringBootApplication
+public class ReactiveResourceServerApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(ReactiveResourceServerApplication.class, args);
+    }
+
+    @Configuration
+    @EnableWebFluxSecurity
+    @EnableReactiveMethodSecurity
+    public class SecurityConfig {
+        @Bean
+        SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http, Converter<Jwt, Mono<Collection<GrantedAuthority>>> authoritiesConverter) {
+            http.oauth2ResourceServer().jwt()
+                    .jwtAuthenticationConverter(jwt -> authoritiesConverter.convert(jwt).map(authorities -> new JwtAuthenticationToken(jwt, authorities)));
+            http.securityContextRepository(NoOpServerSecurityContextRepository.getInstance()).csrf().disable();
+            http.exceptionHandling().accessDeniedHandler((var exchange, var ex) -> exchange.getPrincipal().flatMap(principal -> {
+                final var response = exchange.getResponse();
+                response.setStatusCode(principal instanceof AnonymousAuthenticationToken ? HttpStatus.UNAUTHORIZED : HttpStatus.FORBIDDEN);
+                response.getHeaders().setContentType(MediaType.TEXT_PLAIN);
+                final var dataBufferFactory = response.bufferFactory();
+                final var buffer = dataBufferFactory.wrap(ex.getMessage().getBytes(Charset.defaultCharset()));
+                return response.writeWith(Mono.just(buffer)).doOnError(error -> DataBufferUtils.release(buffer));
+            }));
+
+            http.authorizeExchange().pathMatchers("/secured-route").hasRole("AUTHORIZED_PERSONNEL").anyExchange().authenticated();
+
+            return http.build();
+        }
+
+        static interface AuthoritiesConverter extends Converter<Jwt, Mono<Collection<GrantedAuthority>>> {
+        }
+
+        @Bean
+        AuthoritiesConverter realmRoles2AuthoritiesConverter() {
+            return (Jwt jwt) -> {
+                final var realmRoles = Optional.of(jwt.getClaimAsMap("realm_access")).orElse(Map.of());
+                @SuppressWarnings("unchecked")
+                final var roles = (List<String>) realmRoles.getOrDefault("roles", List.of());
+                return Mono.just(roles.stream().map(SimpleGrantedAuthority::new).map(GrantedAuthority.class::cast).toList());
+            };
+        }
+    }
+
+    @Service
+    public static class MessageService {
+
+        public Mono<String> greet() {
+            return ReactiveSecurityContextHolder.getContext().map(ctx -> {
+                final var who = (JwtAuthenticationToken) ctx.getAuthentication();
+                final var claims = who.getTokenAttributes();
+                return "Hello %s! You are granted with %s.".formatted(
+                        claims.getOrDefault(StandardClaimNames.PREFERRED_USERNAME,claims.get(StandardClaimNames.SUB)),
+                        who.getAuthorities());
+            }).switchIfEmpty(Mono.error(new AuthenticationCredentialsNotFoundException("Security context is empty")));
+        }
+
+        @PreAuthorize("hasRole('AUTHORIZED_PERSONNEL')")
+        public Mono<String> getSecret() {
+            return Mono.just("Only authorized personnel can read that");
+        }
+    }
+
+    @RestController
+    @RequiredArgsConstructor
+    public class GreetingController {
+        private final MessageService messageService;
+
+        @GetMapping("/greet")
+        public Mono<ResponseEntity<String>> greet() {
+            return messageService.greet().map(ResponseEntity::ok);
+        }
+
+        @GetMapping("/secured-route")
+        public Mono<ResponseEntity<String>> securedRoute() {
+            return messageService.getSecret().map(ResponseEntity::ok);
+        }
+
+        @GetMapping("/secured-method")
+        @PreAuthorize("hasRole('AUTHORIZED_PERSONNEL')")
+        public Mono<ResponseEntity<String>> securedMethod() {
+            return messageService.getSecret().map(ResponseEntity::ok);
+        }
+    }
+
+}
@@ -0,0 +1,6 @@
+spring:
+  security:
+    oauth2:
+      resourceserver:
+        jwt:
+          issuer-uri: https://localhost:8443/realms/master
@@ -0,0 +1,79 @@
+package com.baeldung;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Import;
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.authentication.AuthenticationCredentialsNotFoundException;
+import org.springframework.security.config.annotation.method.configuration.EnableReactiveMethodSecurity;
+import org.springframework.security.test.context.support.WithAnonymousUser;
+import org.springframework.security.test.context.support.WithMockUser;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import com.baeldung.ReactiveResourceServerApplication.MessageService;
+import com.c4_soft.springaddons.security.oauth2.test.annotations.OpenIdClaims;
+import com.c4_soft.springaddons.security.oauth2.test.annotations.WithMockJwtAuth;
+
+@Import({ MessageService.class })
+@ExtendWith(SpringExtension.class)
+@EnableReactiveMethodSecurity
+class MessageServiceUnitTest {
+    @Autowired
+    MessageService messageService;
+
+    /*----------------------------------------------------------------------------*/
+    /* greet()                                                                    */
+    /* Expects a JwtAuthenticationToken to be retrieved from the security-context */
+    /*----------------------------------------------------------------------------*/
+
+    @Test
+    void givenSecurityContextIsEmpty_whenGreet_thenThrowsAuthenticationCredentialsNotFoundException() {
+        assertThrows(AuthenticationCredentialsNotFoundException.class, () -> messageService.greet().block());
+    }
+
+    @Test
+    @WithAnonymousUser
+    void givenUserIsNotAuthenticated_whenGreet_thenThrowsClassCastException() {
+        assertThrows(ClassCastException.class, () -> messageService.greet().block());
+    }
+
+    @Test
+    @WithMockJwtAuth(authorities = { "admin", "ROLE_AUTHORIZED_PERSONNEL" }, claims = @OpenIdClaims(preferredUsername = "ch4mpy"))
+    void givenSecurityContextIsPopulatedWithJwtAuthenticationToken_whenGreet_thenReturnGreetingWithPreferredUsernameAndAuthorities() {
+        assertEquals("Hello ch4mpy! You are granted with [admin, ROLE_AUTHORIZED_PERSONNEL].", messageService.greet().block());
+    }
+
+    @Test
+    @WithMockUser(authorities = { "admin", "ROLE_AUTHORIZED_PERSONNEL" }, username = "ch4mpy")
+    void givenSecurityContextIsPopulatedWithUsernamePasswordAuthenticationToken_whenGreet_thenThrowsClassCastException() {
+        assertThrows(ClassCastException.class, () -> messageService.greet().block());
+    }
+
+    /*--------------------------------------------------------------------*/
+    /* getSecret()                                                        */
+    /* is secured with "@PreAuthorize("hasRole('AUTHORIZED_PERSONNEL')")" */
+    /*--------------------------------------------------------------------*/
+
+    @Test
+    @WithAnonymousUser
+    void givenUserIsNotAuthenticated_whenGetSecret_thenThrowsAccessDeniedException() {
+        assertThrows(AccessDeniedException.class, () -> messageService.getSecret().block());
+    }
+
+    @Test
+    @WithMockJwtAuth(authorities = { "admin", "ROLE_AUTHORIZED_PERSONNEL" }, claims = @OpenIdClaims(preferredUsername = "ch4mpy"))
+    void givenUserIsGrantedWithRoleAuthorizedPersonnel_whenGetSecret_thenReturnSecret() {
+        assertEquals("Only authorized personnel can read that", messageService.getSecret().block());
+    }
+
+    @Test
+    @WithMockJwtAuth(authorities = { "admin" }, claims = @OpenIdClaims(preferredUsername = "ch4mpy"))
+    void givenUserIsNotGrantedWithRoleAuthorizedPersonnel_whenGetSecret_thenThrowsAccessDeniedException() {
+        assertThrows(AccessDeniedException.class, () -> messageService.getSecret().block());
+    }
+
+}
@@ -0,0 +1,109 @@
+package com.baeldung;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.AutoConfigureWebTestClient;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.security.test.context.support.WithAnonymousUser;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+import com.c4_soft.springaddons.security.oauth2.test.annotations.OpenIdClaims;
+import com.c4_soft.springaddons.security.oauth2.test.annotations.WithMockJwtAuth;
+
+@SpringBootTest(webEnvironment = WebEnvironment.MOCK)
+@AutoConfigureWebTestClient
+class ReactiveResourceServerApplicationIntegrationTest {
+    @Autowired
+    WebTestClient api;
+
+    /*-----------------------------------------------------------------------------*/
+    /* /greet                                                                      */
+    /* This end-point secured with ".anyRequest().authenticated()" in SecurityConf */
+    /*-----------------------------------------------------------------------------*/
+
+    @Test
+    @WithAnonymousUser
+    void givenUserIsNotAuthenticated_whenGetGreet_thenUnauthorized() throws Exception {
+        // @formatter:off
+        api.get().uri("/greet").exchange()
+            .expectStatus().isUnauthorized();
+        // @formatter:on
+    }
+
+    @Test
+    @WithMockJwtAuth(authorities = { "admin", "ROLE_AUTHORIZED_PERSONNEL" }, claims = @OpenIdClaims(preferredUsername = "ch4mpy"))
+    void givenUserIsAuthenticated_whenGetGreet_thenOk() throws Exception {
+        // @formatter:off
+        api.get().uri("/greet").exchange()
+            .expectStatus().isOk()
+            .expectBody(String.class).isEqualTo("Hello ch4mpy! You are granted with [admin, ROLE_AUTHORIZED_PERSONNEL].");
+        // @formatter:on
+    }
+
+    /*---------------------------------------------------------------------------------------------------------------------*/
+    /* /secured-route                                                                                                      */
+    /* This end-point is secured with ".requestMatchers("/secured-route").hasRole("AUTHORIZED_PERSONNEL")" in SecurityConf */
+    /*---------------------------------------------------------------------------------------------------------------------*/
+
+    @Test
+    @WithAnonymousUser
+    void givenUserIsNotAuthenticated_whenGetSecuredRoute_thenUnauthorized() throws Exception {
+        // @formatter:off
+        api.get().uri("/secured-route").exchange()
+            .expectStatus().isUnauthorized();
+        // @formatter:on
+    }
+
+    @Test
+    @WithMockJwtAuth("ROLE_AUTHORIZED_PERSONNEL")
+    void givenUserIsGrantedWithRoleAuthorizedPersonnel_whenGetSecuredRoute_thenOk() throws Exception {
+        // @formatter:off
+        api.get().uri("/secured-route").exchange()
+            .expectStatus().isOk()
+            .expectBody(String.class).isEqualTo("Only authorized personnel can read that");
+        // @formatter:on
+    }
+
+    @Test
+    @WithMockJwtAuth("admin")
+    void givenUserIsNotGrantedWithRoleAuthorizedPersonnel_whenGetSecuredRoute_thenForbidden() throws Exception {
+        // @formatter:off
+        api.get().uri("/secured-route").exchange()
+            .expectStatus().isForbidden();
+        // @formatter:on
+    }
+    
+    /*---------------------------------------------------------------------------------------------------------*/
+    /* /secured-method                                                                                         */
+    /* This end-point is secured with "@PreAuthorize("hasRole('AUTHORIZED_PERSONNEL')")" on @Controller method */
+    /*---------------------------------------------------------------------------------------------------------*/
+
+    @Test
+    @WithAnonymousUser
+    void givenUserIsNotAuthenticated_whenGetSecuredMethod_thenUnauthorized() throws Exception {
+        // @formatter:off
+        api.get().uri("/secured-method").exchange()
+            .expectStatus().isUnauthorized();
+        // @formatter:on
+    }
+
+    @Test
+    @WithMockJwtAuth("ROLE_AUTHORIZED_PERSONNEL")
+    void givenUserIsGrantedWithRoleAuthorizedPersonnel_whenGetSecuredMethod_thenOk() throws Exception {
+        // @formatter:off
+        api.get().uri("/secured-method").exchange()
+            .expectStatus().isOk()
+            .expectBody(String.class).isEqualTo("Only authorized personnel can read that");
+        // @formatter:on
+    }
+
+    @Test
+    @WithMockJwtAuth("admin")
+    void givenUserIsNotGrantedWithRoleAuthorizedPersonnel_whenGetSecuredMethod_thenForbidden() throws Exception {
+        // @formatter:off
+        api.get().uri("/secured-method").exchange()
+            .expectStatus().isForbidden();
+        // @formatter:on
+    }
+}
@@ -0,0 +1,123 @@
+package com.baeldung;
+
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.security.test.context.support.WithAnonymousUser;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+import com.baeldung.ReactiveResourceServerApplication.GreetingController;
+import com.baeldung.ReactiveResourceServerApplication.MessageService;
+import com.c4_soft.springaddons.security.oauth2.test.annotations.OpenIdClaims;
+import com.c4_soft.springaddons.security.oauth2.test.annotations.WithMockJwtAuth;
+
+import reactor.core.publisher.Mono;
+
+@WebFluxTest(controllers = GreetingController.class, properties = { "server.ssl.enabled=false" })
+class SpringAddonsGreetingControllerUnitTest {
+
+    @MockBean
+    MessageService messageService;
+
+    @Autowired
+    WebTestClient api;
+
+    /*-----------------------------------------------------------------------------*/
+    /* /greet                                                                      */
+    /* This end-point secured with ".anyRequest().authenticated()" in SecurityConf */
+    /*-----------------------------------------------------------------------------*/
+
+    @Test
+    @WithAnonymousUser
+    void givenUserIsNotAuthenticated_whenGetGreet_thenUnauthorized() throws Exception {
+        api.get().uri("/greet").exchange().expectStatus().isUnauthorized();
+    }
+
+    @Test
+    @WithMockJwtAuth(claims = @OpenIdClaims(preferredUsername = "Tonton Pirate"))
+    void givenUserIsAuthenticated_whenGetGreet_thenOk() throws Exception {
+        final var greeting = "Whatever the service returns";
+        when(messageService.greet()).thenReturn(Mono.just(greeting));
+
+        // @formatter:off
+        api.get().uri("/greet").exchange()
+            .expectStatus().isOk()
+            .expectBody(String.class).isEqualTo(greeting);
+        // @formatter:on
+
+        verify(messageService, times(1)).greet();
+    }
+
+    /*---------------------------------------------------------------------------------------------------------------------*/
+    /* /secured-route                                                                                                      */
+    /* This end-point is secured with ".requestMatchers("/secured-route").hasRole("AUTHORIZED_PERSONNEL")" in SecurityConf */
+    /*---------------------------------------------------------------------------------------------------------------------*/
+
+    @Test
+    @WithAnonymousUser
+    void givenUserIsNotAuthenticated_whenGetSecuredRoute_thenUnauthorized() throws Exception {
+        api.get().uri("/secured-route").exchange().expectStatus().isUnauthorized();
+    }
+
+    @Test
+    @WithMockJwtAuth("ROLE_AUTHORIZED_PERSONNEL")
+    void givenUserIsGrantedWithRoleAuthorizedPersonnel_whenGetSecuredRoute_thenOk() throws Exception {
+        final var secret = "Secret!";
+        when(messageService.getSecret()).thenReturn(Mono.just(secret));
+
+        // @formatter:off
+        api.get().uri("/secured-route").exchange()
+            .expectStatus().isOk()
+            .expectBody(String.class).isEqualTo(secret);
+        // @formatter:on
+    }
+
+    @Test
+    @WithMockJwtAuth("admin")
+    void givenUserIsNotGrantedWithRoleAuthorizedPersonnel_whenGetSecuredRoute_thenForbidden() throws Exception {
+        // @formatter:off
+        api.get().uri("/secured-route").exchange()
+            .expectStatus().isForbidden();
+        // @formatter:on
+    }
+    
+    /*---------------------------------------------------------------------------------------------------------*/
+    /* /secured-method                                                                                         */
+    /* This end-point is secured with "@PreAuthorize("hasRole('AUTHORIZED_PERSONNEL')")" on @Controller method */
+    /*---------------------------------------------------------------------------------------------------------*/
+
+    @Test
+    @WithAnonymousUser
+    void givenUserIsNotAuthenticated_whenGetSecuredMethod_thenUnauthorized() throws Exception {
+        api.get().uri("/secured-method").exchange().expectStatus().isUnauthorized();
+    }
+
+    @Test
+    @WithMockJwtAuth("ROLE_AUTHORIZED_PERSONNEL")
+    void givenUserIsGrantedWithRoleAuthorizedPersonnel_whenGetSecuredMethod_thenOk() throws Exception {
+        final var secret = "Secret!";
+        when(messageService.getSecret()).thenReturn(Mono.just(secret));
+
+        // @formatter:off
+        api.get().uri("/secured-method").exchange()
+            .expectStatus().isOk()
+            .expectBody(String.class).isEqualTo(secret);
+        // @formatter:on
+    }
+
+    @Test
+    @WithMockJwtAuth("admin")
+    void givenUserIsNotGrantedWithRoleAuthorizedPersonnel_whenGetSecuredMethod_thenForbidden() throws Exception {
+        // @formatter:off
+        api.get().uri("/secured-method").exchange()
+            .expectStatus().isForbidden();
+        // @formatter:on
+    }
+
+}
+
@@ -0,0 +1,138 @@
+package com.baeldung;
+
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.springframework.security.test.web.reactive.server.SecurityMockServerConfigurers.mockAuthentication;
+import static org.springframework.security.test.web.reactive.server.SecurityMockServerConfigurers.mockJwt;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.reactive.WebFluxTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.security.authentication.AnonymousAuthenticationToken;
+import org.springframework.security.core.authority.AuthorityUtils;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.test.web.reactive.server.WebTestClient;
+
+import com.baeldung.ReactiveResourceServerApplication.GreetingController;
+import com.baeldung.ReactiveResourceServerApplication.MessageService;
+
+import reactor.core.publisher.Mono;
+
+@WebFluxTest(controllers = GreetingController.class, properties = { "server.ssl.enabled=false" })
+class SpringSecurityTestGreetingControllerUnitTest {
+    private static final AnonymousAuthenticationToken ANONYMOUS_AUTHENTICATION = new AnonymousAuthenticationToken(
+            "anonymous",
+            "anonymousUser",
+            AuthorityUtils.createAuthorityList("ROLE_ANONYMOUS"));
+
+    @MockBean
+    MessageService messageService;
+
+    @Autowired
+    WebTestClient api;
+
+    /*-----------------------------------------------------------------------------*/
+    /* /greet                                                                      */
+    /* This end-point secured with ".anyRequest().authenticated()" in SecurityConf */
+    /*-----------------------------------------------------------------------------*/
+
+    @Test
+    void givenUserIsNotAuthenticated_whenGetGreet_thenUnauthorized() throws Exception {
+        // @formatter:off
+        api.mutateWith(mockAuthentication(ANONYMOUS_AUTHENTICATION))
+            .get().uri("/greet").exchange()
+            .expectStatus().isUnauthorized();
+        // @formatter:on
+    }
+
+    @Test
+    void givenUserIsAuthenticated_whenGetGreet_thenOk() throws Exception {
+        final var greeting = "Whatever the service returns";
+        when(messageService.greet()).thenReturn(Mono.just(greeting));
+
+        // @formatter:off
+        api.mutateWith(mockJwt())
+            .get().uri("/greet").exchange()
+            .expectStatus().isOk()
+            .expectBody(String.class).isEqualTo(greeting);
+        // @formatter:on
+
+        verify(messageService, times(1)).greet();
+    }
+
+    /*---------------------------------------------------------------------------------------------------------------------*/
+    /* /secured-route                                                                                                      */
+    /* This end-point is secured with ".requestMatchers("/secured-route").hasRole("AUTHORIZED_PERSONNEL")" in SecurityConf */
+    /*---------------------------------------------------------------------------------------------------------------------*/
+
+    @Test
+    void givenUserIsNotAuthenticated_whenGetSecuredRoute_thenUnauthorized() throws Exception {
+        // @formatter:off
+        api.mutateWith(mockAuthentication(ANONYMOUS_AUTHENTICATION))
+            .get().uri("/secured-route").exchange()
+            .expectStatus().isUnauthorized();
+        // @formatter:on
+    }
+    
+    @Test
+    void givenUserIsGrantedWithRoleAuthorizedPersonnel_whenGetSecuredRoute_thenOk() throws Exception {
+        final var secret = "Secret!";
+        when(messageService.getSecret()).thenReturn(Mono.just(secret));
+    
+        // @formatter:off
+        api.mutateWith(mockJwt().authorities(new SimpleGrantedAuthority("ROLE_AUTHORIZED_PERSONNEL")))
+            .get().uri("/secured-route").exchange()
+            .expectStatus().isOk()
+            .expectBody(String.class).isEqualTo(secret);
+        // @formatter:on
+    }
+    
+    @Test
+    void givenUserIsNotGrantedWithRoleAuthorizedPersonnel_whenGetSecuredRoute_thenForbidden() throws Exception {
+        // @formatter:off
+        api.mutateWith(mockJwt().authorities(new SimpleGrantedAuthority("admin")))
+            .get().uri("/secured-route").exchange()
+            .expectStatus().isForbidden();
+        // @formatter:on
+    }
+    
+    /*---------------------------------------------------------------------------------------------------------*/
+    /* /secured-method                                                                                         */
+    /* This end-point is secured with "@PreAuthorize("hasRole('AUTHORIZED_PERSONNEL')")" on @Controller method */
+    /*---------------------------------------------------------------------------------------------------------*/
+
+    @Test
+    void givenUserIsNotAuthenticated_whenGetSecuredMethod_thenUnauthorized() throws Exception {
+        // @formatter:off
+        api.mutateWith(mockAuthentication(ANONYMOUS_AUTHENTICATION))
+            .get().uri("/secured-method").exchange()
+            .expectStatus().isUnauthorized();
+        // @formatter:on
+    }
+
+    @Test
+    void givenUserIsGrantedWithRoleAuthorizedPersonnel_whenGetSecuredMethod_thenOk() throws Exception {
+        final var secret = "Secret!";
+        when(messageService.getSecret()).thenReturn(Mono.just(secret));
+
+        // @formatter:off
+        api.mutateWith(mockJwt().authorities(new SimpleGrantedAuthority("ROLE_AUTHORIZED_PERSONNEL")))
+            .get().uri("/secured-method").exchange()
+            .expectStatus().isOk()
+            .expectBody(String.class).isEqualTo(secret);
+        // @formatter:on
+    }
+
+    @Test
+    void givenUserIsNotGrantedWithRoleAuthorizedPersonnel_whenGetSecuredMethod_thenForbidden() throws Exception {
+        // @formatter:off
+        api.mutateWith(mockJwt().authorities(new SimpleGrantedAuthority("admin")))
+            .get().uri("/secured-method").exchange()
+            .expectStatus().isForbidden();
+        // @formatter:on
+    }
+
+}
+