SONAR-21643 Add support for Junit5

build.gradle

@@ -356,6 +356,13 @@ subprojects {
       dependency 'javax.servlet:javax.servlet-api:4.0.1'
       dependency 'javax.xml.bind:jaxb-api:2.3.1'
       dependency 'junit:junit:4.13.2'
+      // JUnit 5
+      dependencySet(group: 'org.junit.jupiter', version: '5.10.2') {
+        entry 'junit-jupiter-api'
+        entry 'junit-jupiter-engine'
+        entry 'junit-jupiter-params'
+        entry 'junit-vintage-engine'
+      }
       dependency 'org.xmlunit:xmlunit-core:2.9.1'
       dependency 'org.xmlunit:xmlunit-matchers:2.9.1'
       dependency 'org.lz4:lz4-java:1.8.0'

sonar-core/build.gradle

@@ -30,6 +30,7 @@ dependencies {
   testImplementation 'com.tngtech.java:junit-dataprovider'
   testImplementation 'junit:junit'
   testImplementation 'org.assertj:assertj-core'
+  testImplementation 'org.junit.jupiter:junit-jupiter-api'
   testImplementation 'org.hamcrest:hamcrest-core'
   testImplementation 'org.mockito:mockito-core'
   testImplementation 'org.simpleframework:simple'
@@ -37,6 +38,9 @@ dependencies {
   testImplementation project(':sonar-testing-harness')
 
   testCompileOnly 'com.google.code.findbugs:jsr305'
+
+  testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
+  testRuntimeOnly 'org.junit.vintage:junit-vintage-engine'
 }
 
 // Used by sonar-db-core to run DB Unit Tests
@@ -52,3 +56,8 @@ publishing {
     }
   }
 }
+
+test {
+  // Enabling the JUnit Platform (see https://github.com/junit-team/junit5-samples/tree/master/junit5-migration-gradle)
+  useJUnitPlatform()
+}

sonar-core/src/test/java/org/sonar/classloader/MaskTest.java

@@ -19,7 +19,7 @@
  */
 package org.sonar.classloader;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;