chore(deps): update plugin org.springframework.boot to v4 (#347)

* chore(deps): update plugin org.springframework.boot to v4

* fix(deps): update MongoDB URI property and improve test configuration

* fix(deps): revert testcontainers dependencies to version 1.21.4

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: eric <psytraxx@gmail.com>

Author: renovate[bot]

backend/build.gradle

@@ -1,6 +1,6 @@
 plugins {
 	id 'java'
-	id "org.springframework.boot" version "3.5.13"
+	id "org.springframework.boot" version "4.0.5"
     id 'io.spring.dependency-management' version '1.1.7'
     id 'jacoco' // Add JaCoCo plugin
 }
@@ -22,10 +22,9 @@ dependencies {
 	compileOnly group: 'org.projectlombok', name: 'lombok', version: '1.18.44'
 	annotationProcessor 'org.projectlombok:lombok:1.18.44'
 	// end::actuator[]
-	implementation 'org.springframework.boot:spring-boot-starter-web'
 	// tag::tests[]
-	// Add Spring Boot's core testing module
-	testImplementation 'org.springframework.boot:spring-boot-test'
+	testImplementation 'org.springframework.boot:spring-boot-starter-webflux-test'
+	testImplementation 'org.springframework.boot:spring-boot-starter-data-mongodb-reactive-test'
 
 	testCompileOnly 'org.projectlombok:lombok:1.18.44'
 	testAnnotationProcessor 'org.projectlombok:lombok:1.18.44'
@@ -34,9 +33,9 @@ dependencies {
 	testImplementation 'io.projectreactor:reactor-test' // Add this for StepVerifier
 
 	// Test containers
-	testImplementation platform('org.testcontainers:testcontainers-bom:2.0.4')
-	testImplementation 'org.testcontainers:junit-jupiter'
-	testImplementation 'org.testcontainers:mongodb'
+	testImplementation platform('org.testcontainers:testcontainers-bom:1.21.4')
+	testImplementation 'org.testcontainers:junit-jupiter:1.21.4'
+	testImplementation 'org.testcontainers:mongodb:1.21.4'
 	// end::tests[]
 
 	testRuntimeOnly 'org.junit.platform:junit-platform-launcher'

backend/src/main/resources/application.properties

@@ -1,4 +1,4 @@
-spring.data.mongodb.uri=mongodb://${DB_HOST:localhost}:27017/chat_app_db
+spring.mongodb.uri=mongodb://${DB_HOST:localhost}:27017/chat_app_db
 logging.level.org.springframework.data.mongodb.core.MongoTemplate=DEBUG
 ## Hibernate Logging
 logging.level.org.hibernate.SQL=DEBUG

backend/src/test/java/com/ssechat/controller/ChatMessageControllerTest.java

@@ -6,6 +6,7 @@
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.webtestclient.autoconfigure.AutoConfigureWebTestClient;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.http.MediaType;
 import org.springframework.test.context.DynamicPropertyRegistry;
@@ -22,6 +23,7 @@
 
 @ExtendWith(SpringExtension.class)
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@AutoConfigureWebTestClient
 @Testcontainers
 class ChatMessageControllerTest {
 
@@ -38,7 +40,7 @@ class ChatMessageControllerTest {
 
     @DynamicPropertySource
     static void setProperties(DynamicPropertyRegistry registry) {
-        registry.add("spring.data.mongodb.uri", mongoDBContainer::getReplicaSetUrl);
+        registry.add("spring.mongodb.uri", mongoDBContainer::getReplicaSetUrl);
     }
 
     @Autowired