fix integration test cases (#8727)

* fix integration test cases

* fix integration test cases

* used dynamic port in the integration test cases

spring-5-reactive-client/pom.xml

@@ -92,8 +92,8 @@
         </dependency>
         <dependency>
             <groupId>com.github.tomakehurst</groupId>
-            <artifactId>wiremock</artifactId>
-            <version>2.24.1</version>
+            <artifactId>wiremock-standalone</artifactId>
+            <version>2.26.0</version>
             <scope>test</scope>
         </dependency>
 

spring-5-reactive-client/src/test/java/com/baeldung/reactive/ReactiveIntegrationTest.java

@@ -1,37 +1,67 @@
 package com.baeldung.reactive;
 
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.configureFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.get;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlEqualTo;
+import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.wireMockConfig;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
 import org.springframework.web.reactive.function.client.ClientResponse;
 import org.springframework.web.reactive.function.client.WebClient;
 
 import com.baeldung.reactive.model.Foo;
+import com.github.tomakehurst.wiremock.WireMockServer;
 
 import reactor.core.publisher.Mono;
 
+@RunWith(SpringRunner.class)
 @SpringBootTest
 public class ReactiveIntegrationTest {
 
     private WebClient client;
-
-    @BeforeEach
-    public void before() {
-        client = WebClient.create("http://localhost:8080");
+    private int singleRequestTime = 1000;
+    private WireMockServer wireMockServer;
+    
+    @Before
+    public void setup() {
+        wireMockServer = new WireMockServer(wireMockConfig().dynamicPort());
+        wireMockServer.start();
+        configureFor("localhost", wireMockServer.port());
+        client = WebClient.create("http://localhost:" + wireMockServer.port());
     }
 
-    //
+    @After
+    public void tearDown() {
+        wireMockServer.stop();
+    }
 
     @Test
     public void whenMonoReactiveEndpointIsConsumed_thenCorrectOutput() {
-        final Mono<ClientResponse> fooMono = client.get().uri("/foos/123").exchange().log();
+        stubFor(get(urlEqualTo("/foo/123")).willReturn(aResponse().withFixedDelay(singleRequestTime)
+            .withStatus(200)
+            .withHeader("Content-Type", "application/json")
+            .withBody("{\"id\":123, \"name\":\"foo\"}")));
+        
+        final Mono<ClientResponse> fooMono = client.get().uri("/foo/123").exchange().log();
 
         System.out.println(fooMono.subscribe());
     }
 
     @Test
     public void whenFluxReactiveEndpointIsConsumed_thenCorrectOutput() throws InterruptedException {
-        client.get().uri("/foos")
+        stubFor(get(urlEqualTo("/foo")).willReturn(aResponse().withFixedDelay(singleRequestTime)
+            .withStatus(200)
+            .withHeader("Content-Type", "application/json")
+            .withBody("{\"id\":1, \"name\":\"foo\"}")));
+        
+        client.get().uri("/foo")
             .retrieve()
             .bodyToFlux(Foo.class).log()
             .subscribe(System.out::println);

spring-5-reactive-client/src/test/java/com/baeldung/reactive/webclient/simultaneous/ClientIntegrationTest.java

@@ -5,6 +5,7 @@ import org.junit.Before;
 import org.junit.After;
 import org.junit.runner.RunWith;
 import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit4.SpringRunner;
 import com.github.tomakehurst.wiremock.WireMockServer;
 
@@ -19,15 +20,19 @@ import static org.junit.Assert.assertEquals;
 
 @RunWith(SpringRunner.class)
 @SpringBootTest
+@DirtiesContext
 public class ClientIntegrationTest {
 
     private WireMockServer wireMockServer;
 
+    private Client client;
+    
     @Before
     public void setup() {
-        wireMockServer = new WireMockServer(wireMockConfig().port(8089));
+        wireMockServer = new WireMockServer(wireMockConfig().dynamicPort());
         wireMockServer.start();
         configureFor("localhost", wireMockServer.port());
+        client = new Client("http://localhost:" + wireMockServer.port());
     }
 
     @After
@@ -52,8 +57,6 @@ public class ClientIntegrationTest {
             .boxed()
             .collect(Collectors.toList());
 
-        Client client = new Client("http://localhost:8089");
-
         // Act
         long start = System.currentTimeMillis();
         List<User> users = client.fetchUsers(userIds)