[test] add java packaging test project

Adds a project for building and running packaging tests written in java
for portability. The vagrant tasks use jars on the packagingTest
configuration, which are built in the same project. No tests are added
yet.

Corresponding changes are not made to :x-pack:qa:vagrant because the
java packaging tests will all be consolidated into one project.

For elastic#26741

Author: andyb-elastic

Vagrantfile

@@ -337,6 +337,7 @@ export BATS=/project/build/bats
 export BATS_UTILS=/project/build/packaging/bats/utils
 export BATS_TESTS=/project/build/packaging/bats/tests
 export PACKAGING_ARCHIVES=/project/build/packaging/archives
+export PACKAGING_TESTS=/project/build/packaging/tests
 VARS
     cat \<\<SUDOERS_VARS > /etc/sudoers.d/elasticsearch_vars
 Defaults   env_keep += "ZIP"
@@ -347,6 +348,7 @@ Defaults   env_keep += "BATS"
 Defaults   env_keep += "BATS_UTILS"
 Defaults   env_keep += "BATS_TESTS"
 Defaults   env_keep += "PACKAGING_ARCHIVES"
+Defaults   env_keep += "PACKAGING_TESTS"
 SUDOERS_VARS
     chmod 0440 /etc/sudoers.d/elasticsearch_vars
   SHELL

buildSrc/src/main/groovy/org/elasticsearch/gradle/FileContentsTask.groovy

@@ -36,6 +36,9 @@ class FileContentsTask extends DefaultTask {
   @Input
   Object contents
 
+  @Input
+  boolean executable = false
+
   /**
    * The file to be built. Takes any objecct and coerces to a file.
    */
@@ -47,5 +50,6 @@ class FileContentsTask extends DefaultTask {
   void setContents() {
     file = file as File
     file.text = contents.toString()
+    file.setExecutable(executable)
   }
 }

buildSrc/src/main/groovy/org/elasticsearch/gradle/vagrant/VagrantPropertiesExtension.groovy

@@ -41,6 +41,9 @@ class VagrantPropertiesExtension {
     @Input
     Boolean inheritTestUtils
 
+    @Input
+    String testClass
+
     VagrantPropertiesExtension(List<String> availableBoxes) {
         this.boxes = availableBoxes
         this.batsDir = 'src/test/resources/packaging'

buildSrc/src/main/groovy/org/elasticsearch/gradle/vagrant/VagrantTestPlugin.groovy

@@ -44,6 +44,7 @@ class VagrantTestPlugin implements Plugin<Project> {
     static List<String> UPGRADE_FROM_ARCHIVES = ['rpm', 'deb']
 
     private static final PACKAGING_CONFIGURATION = 'packaging'
+    private static final PACKAGING_TEST_CONFIGURATION = 'packagingTest'
     private static final BATS = 'bats'
     private static final String BATS_TEST_COMMAND ="cd \$PACKAGING_ARCHIVES && sudo bats --tap \$BATS_TESTS/*.$BATS"
     private static final String PLATFORM_TEST_COMMAND ="rm -rf ~/elasticsearch && rsync -r /elasticsearch/ ~/elasticsearch && cd ~/elasticsearch && ./gradlew test integTest"
@@ -59,6 +60,7 @@ class VagrantTestPlugin implements Plugin<Project> {
 
         // Creates custom configurations for Bats testing files (and associated scripts and archives)
         createPackagingConfiguration(project)
+        project.configurations.create(PACKAGING_TEST_CONFIGURATION)
 
         // Creates all the main Vagrant tasks
         createVagrantTasks(project)
@@ -142,10 +144,12 @@ class VagrantTestPlugin implements Plugin<Project> {
     }
 
     private static void createCleanTask(Project project) {
-        project.tasks.create('clean', Delete.class) {
-            description 'Clean the project build directory'
-            group 'Build'
-            delete project.buildDir
+        if (project.tasks.findByName('clean') == null) {
+            project.tasks.create('clean', Delete.class) {
+                description 'Clean the project build directory'
+                group 'Build'
+                delete project.buildDir
+            }
         }
     }
 
@@ -172,6 +176,19 @@ class VagrantTestPlugin implements Plugin<Project> {
             from project.configurations[PACKAGING_CONFIGURATION]
         }
 
+        File testsDir = new File(packagingDir, 'tests')
+        Copy copyPackagingTests = project.tasks.create('copyPackagingTests', Copy) {
+            into testsDir
+            from project.configurations[PACKAGING_TEST_CONFIGURATION]
+        }
+
+        Task createTestRunnerScript = project.tasks.create('createTestRunnerScript', FileContentsTask) {
+            dependsOn copyPackagingTests
+            file "${testsDir}/run-tests.sh"
+            contents "java -cp \"*\" org.junit.runner.JUnitCore ${-> project.extensions.esvagrant.testClass}"
+            executable true
+        }
+
         Task createVersionFile = project.tasks.create('createVersionFile', FileContentsTask) {
             dependsOn copyPackagingArchives
             file "${archivesDir}/version"
@@ -232,7 +249,8 @@ class VagrantTestPlugin implements Plugin<Project> {
 
         Task vagrantSetUpTask = project.tasks.create('setupPackagingTest')
         vagrantSetUpTask.dependsOn 'vagrantCheckVersion'
-        vagrantSetUpTask.dependsOn copyPackagingArchives, createVersionFile, createUpgradeFromFile, createUpgradeIsOssFile
+        vagrantSetUpTask.dependsOn copyPackagingArchives, copyPackagingTests, createTestRunnerScript
+        vagrantSetUpTask.dependsOn createVersionFile, createUpgradeFromFile, createUpgradeIsOssFile
         vagrantSetUpTask.dependsOn copyBatsTests, copyBatsUtils
     }
 
@@ -391,20 +409,29 @@ class VagrantTestPlugin implements Plugin<Project> {
                 packagingTest.dependsOn(batsPackagingTest)
             }
 
-            // This task doesn't do anything yet. In the future it will execute a jar containing tests on the vm
-            Task groovyPackagingTest = project.tasks.create("vagrant${boxTask}#groovyPackagingTest")
-            groovyPackagingTest.dependsOn(up)
-            groovyPackagingTest.finalizedBy(halt)
+            Task javaPackagingTest = project.tasks.create("vagrant${boxTask}#javaPackagingTest", VagrantCommandTask) {
+                command 'ssh'
+                boxName box
+                environmentVars vagrantEnvVars
+                dependsOn up, setupPackagingTest
+                finalizedBy halt
+                args '--command', "cd \$PACKAGING_TESTS && ./run-tests.sh"
+            }
+
+            // todo remove this onlyIf after all packaging tests are consolidated
+            javaPackagingTest.onlyIf {
+                project.extensions.esvagrant.testClass != null
+            }
 
-            TaskExecutionAdapter groovyPackagingReproListener = createReproListener(project, groovyPackagingTest.path)
-            groovyPackagingTest.doFirst {
-                project.gradle.addListener(groovyPackagingReproListener)
+            TaskExecutionAdapter javaPackagingReproListener = createReproListener(project, javaPackagingTest.path)
+            javaPackagingTest.doFirst {
+                project.gradle.addListener(javaPackagingReproListener)
             }
-            groovyPackagingTest.doLast {
-                project.gradle.removeListener(groovyPackagingReproListener)
+            javaPackagingTest.doLast {
+                project.gradle.removeListener(javaPackagingReproListener)
             }
             if (project.extensions.esvagrant.boxes.contains(box)) {
-                packagingTest.dependsOn(groovyPackagingTest)
+                packagingTest.dependsOn(javaPackagingTest)
             }
 
             Task platform = project.tasks.create("vagrant${boxTask}#platformTest", VagrantCommandTask) {

qa/vagrant/build.gradle

@@ -1,3 +1,5 @@
+import org.elasticsearch.gradle.precommit.PrecommitTasks
+
 /*
  * Licensed to Elasticsearch under one or more contributor
  * license agreements. See the NOTICE file distributed with
@@ -17,8 +19,23 @@
  * under the License.
  */
 
-apply plugin: 'elasticsearch.vagrantsupport'
-apply plugin: 'elasticsearch.vagrant'
+plugins {
+  id 'java'
+  id 'elasticsearch.build'
+  id 'elasticsearch.vagrantsupport'
+  id 'elasticsearch.vagrant'
+}
+
+dependencies {
+  compile "junit:junit:${versions.junit}"
+  compile "org.hamcrest:hamcrest-core:${versions.hamcrest}"
+
+  // needs to be on the classpath for JarHell
+  runtime project(':libs:elasticsearch-core')
+
+  // pulls in the jar built by this project and its dependencies
+  packagingTest project(path: project.path, configuration: 'runtime')
+}
 
 List<String> plugins = []
 for (Project subproj : project.rootProject.subprojects) {
@@ -39,3 +56,20 @@ setupPackagingTest {
     expectedPlugins.setText(plugins.join('\n'), 'UTF-8')
   }
 }
+
+esvagrant {
+  testClass 'org.elasticsearch.packaging.PackagingTests'
+}
+
+forbiddenApisMain {
+  signaturesURLs = [
+    PrecommitTasks.getResource('/forbidden/jdk-signatures.txt')
+  ]
+}
+
+// we don't have additional tests for the tests themselves
+tasks.test.enabled = false
+
+// this project doesn't get published
+tasks.dependencyLicenses.enabled = false
+tasks.dependenciesInfo.enabled = false

qa/vagrant/src/main/java/org/elasticsearch/packaging/PackagingTests.java

@@ -0,0 +1,31 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.packaging;
+
+import org.junit.Test;
+
+/**
+ * This class doesn't have any tests yet
+ */
+public class PackagingTests {
+
+    @Test
+    public void testDummy() {}
+}