ci: add GitHub Actions workflow and JUnit 5 config

Author: jsgiraldoh28

.github/workflows/maven.yml

@@ -0,0 +1,32 @@
+name: Java CI with Maven
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout repo
+      uses: actions/checkout@v4
+
+    - name: Set up JDK 17
+      uses: actions/setup-java@v4
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: maven
+
+    - name: Build with Maven
+      run: mvn -B -V -DskipTests=false verify
+
+    - name: Upload test results
+      if: always()
+      uses: actions/upload-artifact@v4
+      with:
+        name: test-results
+        path: target/surefire-reports || target/failsafe-reports || target

README.md

@@ -9,6 +9,11 @@ The repository contains a simple Java application which outputs the string
 main application works as expected. The results of these tests are saved to a
 JUnit XML report.
 
+## Continuous Integration
+
+This repository includes a GitHub Actions workflow at `.github/workflows/maven.yml` that runs on push and pull requests to `master`.
+It uses JDK 17 and runs `mvn -B verify`, publishing test artifacts.
+
 The `jenkins` directory contains an example of the `Jenkinsfile` (i.e. Pipeline)
 you'll be creating yourself during the tutorial and the `jenkins/scripts` subdirectory
 contains a shell script with commands that are executed when Jenkins processes

pom.xml

@@ -14,6 +14,12 @@
       <version>5.11.0</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
+      <version>5.11.0</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -32,6 +38,14 @@
       </plugins>
     </pluginManagement>
     <plugins>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-surefire-plugin</artifactId>
+        <version>3.0.0-M9</version>
+        <configuration>
+          <useModulePath>false</useModulePath>
+        </configuration>
+      </plugin>
       <plugin>
         <!-- Build an executable JAR -->
         <groupId>org.apache.maven.plugins</groupId>

src/main/java/com/mycompany/app/App.java

@@ -5,7 +5,7 @@
  */
 public class App {
 
-    private static final String MESSAGE = "Hello World!";
+    private static final String MESSAGE = "Hello World from Github Actions!";
 
     public App() {}