Use Xvfb for testing

Jenkinsfile

@@ -12,54 +12,54 @@ pipeline {
         GPG_OWNER_TRUST = credentials('8703bbe8-c099-481f-8337-1dce32d51771')
     }
 
-    stages {
-        stage("Import GPG Keys") {
-            when {
-                branch 'release'
-            }
-            steps {
-                sh 'gpg --batch --import $GPG_SECRET_KEY'
-                sh 'gpg --import-ownertrust $GPG_OWNER_TRUST'
+    wrap([$class: 'Xvfb']) {
+        stages {
+            stage("Import GPG Keys") {
+                when {
+                    branch 'release'
+                }
+                steps {
+                    sh 'gpg --batch --import $GPG_SECRET_KEY'
+                    sh 'gpg --import-ownertrust $GPG_OWNER_TRUST'
+                }
             }
-        }
-        stage("Build") {
-            steps {
-                withCredentials([file(credentialsId: '076a36e8-d448-46fc-af11-7e7181a6cb99', variable: 'MAVEN_SETTINGS')]) {
-                    sh 'mvn -s $MAVEN_SETTINGS -B -DskipTests clean package'
+            stage("Build") {
+                steps {
+                    withCredentials([file(credentialsId: '076a36e8-d448-46fc-af11-7e7181a6cb99', variable: 'MAVEN_SETTINGS')]) {
+                        sh 'mvn -s $MAVEN_SETTINGS -B -DskipTests clean package'
+                    }
                 }
             }
-        }
-        stage("Test") {
-            wrap([$class: 'Xvfb']) {
+            stage("Test") {
                 steps {
                     sh "mvn test"
                 }
-            }
-            post {
-                success {
-                    echo "Generating Test Report..."
-                    publishCoverage adapters: [jacocoAdapter('target/site/jacoco/jacoco.xml')]
+                post {
+                    success {
+                        echo "Generating Test Report..."
+                        publishCoverage adapters: [jacocoAdapter('target/site/jacoco/jacoco.xml')]
 
-                    echo "Sending Report to CodeCov..."
-                    sh '''#!/bin/bash
-                          bash <(curl -s https://codecov.io/bash) -t $CODECOV_TOKEN || echo "Codecov did not collect coverage reports"
-                       '''
+                        echo "Sending Report to CodeCov..."
+                        sh '''#!/bin/bash
+                              bash <(curl -s https://codecov.io/bash) -t $CODECOV_TOKEN || echo "Codecov did not collect coverage reports"
+                           '''
+                    }
                 }
             }
-        }
-        stage("Deploy To OSSRH") {
-            when {
-                branch 'release'
-            }
-            steps {
-                withCredentials([file(credentialsId: '076a36e8-d448-46fc-af11-7e7181a6cb99', variable: 'MAVEN_SETTINGS')]) {
-                    sh 'mvn -s $MAVEN_SETTINGS -B -DskipTests clean deploy'
+            stage("Deploy To OSSRH") {
+                when {
+                    branch 'release'
                 }
-            }
-            post {
-                success {
-                    echo "Archiving Artifacts"
-                    archiveArtifacts artifacts: 'target/*.jar'
+                steps {
+                    withCredentials([file(credentialsId: '076a36e8-d448-46fc-af11-7e7181a6cb99', variable: 'MAVEN_SETTINGS')]) {
+                        sh 'mvn -s $MAVEN_SETTINGS -B -DskipTests clean deploy'
+                    }
+                }
+                post {
+                    success {
+                        echo "Archiving Artifacts"
+                        archiveArtifacts artifacts: 'target/*.jar'
+                    }
                 }
             }
         }