[FIXED JENKINS-26331] Noting merge of #1519.

changelog.html

@@ -61,6 +61,9 @@ Upcoming changes</a>
   <li class=bug>
     Folder loading broken when child item loading throws exception.
     (<a href="https://issues.jenkins-ci.org/browse/JENKINS-22811">issue 22811</a>)
+  <li class=bug>
+    Better support functional tests from Gradle-based plugins.
+    (<a href="https://issues.jenkins-ci.org/browse/JENKINS-26331">issue 26331</a>)
 </ul>
 </div><!--=TRUNK-END=-->
 

test/src/main/java/org/jvnet/hudson/test/WarExploder.java

@@ -88,7 +88,8 @@ final class WarExploder {
         File war = Which.jarFile(Class.forName("executable.Executable"));
 
         // TODO this assumes that the CWD of the Maven process is the plugin ${basedir}, which may not be the case
-        File explodeDir = new File("./target/jenkins-for-test").getAbsoluteFile();
+        File buildDirectory = new File(System.getProperty("buildDirectory", "target"));
+        File explodeDir = new File(buildDirectory, "jenkins-for-test").getAbsoluteFile();
         explodeDir.getParentFile().mkdirs();
         while (new File(explodeDir + ".exploding").isFile()) {
             explodeDir = new File(explodeDir + "x");