update versions

junit.jupiter and adding assertj-core  dependency for testing

Java/build.gradle

@@ -10,6 +10,8 @@ dependencies {
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.2'
     testImplementation 'org.junit.jupiter:junit-jupiter-params:5.6.2'
     testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.6.2'
+    testImplementation("org.junit.jupiter:junit-jupiter:5.8.2")
+    testImplementation group: 'org.assertj', name: 'assertj-core', version: '3.23.1'
 }
 
 group = 'com.gildedrose'
@@ -17,5 +19,13 @@ version = '0.0.1-SNAPSHOT'
 sourceCompatibility = '1.8'
 
 test {
+    // Discover and execute JUnit4-based tests
+    useJUnit()
+
+    // Discover and execute TestNG-based tests
+    useTestNG()
+
+    // Discover and execute JUnit Platform-based (JUnit 5, JUnit Jupiter) tests
+    // Note that JUnit 5 has the ability to execute JUnit 4 tests as well
     useJUnitPlatform()
 }

Java/pom.xml

@@ -11,19 +11,32 @@
 
     <properties>
         <java.version>1.8</java.version>
-        <junit.jupiter.version>5.8.2</junit.jupiter.version>
+        <junit.jupiter.version>5.9.0</junit.jupiter.version>
         <maven.maven-compiler-plugin.version>3.1</maven.maven-compiler-plugin.version>
         <maven.maven-surefire-plugin.version>3.0.0-M4</maven.maven-surefire-plugin.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
     <dependencies>
+        <!--Optional: Supports running Junit4 along with Junit5 -->
         <dependency>
             <groupId>org.junit.jupiter</groupId>
-            <artifactId>junit-jupiter</artifactId>
+            <artifactId>junit-jupiter-engine</artifactId>
             <version>${junit.jupiter.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>${junit.jupiter.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>3.23.1</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>