Added nexus stage and env variables

Jenkinsfile

@@ -4,6 +4,14 @@ pipeline {
         maven 'maven'
     }
 
+    environment {
+        NEXUS_VERSION = "nexus3"
+        NEXUS_PROTOCOL = "http"
+        NEXUS_URL = "34.69.185.118:8081"
+        NEXUS_REPOSITORY = "maven-nexus-jenkins-repo"
+        NEXUS_CREDENTIAL_ID = "nexus-credentials"
+    }
+
 	stages {
         stage('Git Checkout') {
             steps{
@@ -18,6 +26,16 @@ pipeline {
                 sh 'mvn -Dmaven.test.failure.ignore=false install' 
             } 
         }
+        stage('Test'){
+            steps{
+                sh 'mvn test'
+            }
+            post {
+                always {
+                    junit 'target/surefire-reports/*.xml'
+                }
+            }
+        }
         stage('SonarQube Analysis') {
             steps{
                 withSonarQubeEnv('Sonarqube') {
@@ -32,5 +50,51 @@ pipeline {
                 }
             }
         }
+        stage("publish to nexus") {
+            steps {
+                script {
+                    // Read POM xml file using 'readMavenPom' step , this step 'readMavenPom' is included in: https://plugins.jenkins.io/pipeline-utility-steps
+                    pom = readMavenPom file: "pom.xml";
+                    // Find built artifact under target folder
+                    filesByGlob = findFiles(glob: "target/*.${pom.packaging}");
+                    // Print some info from the artifact found
+                    echo "${filesByGlob[0].name} ${filesByGlob[0].path} ${filesByGlob[0].directory} ${filesByGlob[0].length} ${filesByGlob[0].lastModified}"
+                    // Extract the path from the File found
+                    artifactPath = filesByGlob[0].path;
+                    // Assign to a boolean response verifying If the artifact name exists
+                    artifactExists = fileExists artifactPath;
+                    
+                    if(artifactExists) {
+                        echo "*** File: ${artifactPath}, group: ${pom.groupId}, packaging: ${pom.packaging}, version ${pom.version}";
+                        
+                        nexusArtifactUploader(
+                            nexusVersion: NEXUS_VERSION,
+                            protocol: NEXUS_PROTOCOL,
+                            nexusUrl: NEXUS_URL,
+                            groupId: pom.groupId,
+                            version: pom.version,
+                            repository: NEXUS_REPOSITORY,
+                            credentialsId: NEXUS_CREDENTIAL_ID,
+                            artifacts: [
+                                // Artifact generated such as .jar, .ear and .war files.
+                                [artifactId: pom.artifactId,
+                                classifier: '',
+                                file: artifactPath,
+                                type: pom.packaging],
+
+                                // Lets upload the pom.xml file for additional information for Transitive dependencies
+                                [artifactId: pom.artifactId,
+                                classifier: '',
+                                file: "pom.xml",
+                                type: "pom"]
+                            ]
+                        );
+
+                    } else {
+                        error "*** File: ${artifactPath}, could not be found";
+                    }
+                }
+            }
+        }
 	}
 }