My use-case: I am basically adding tests to the open source library TestNG. As part of test, I need to test if TestNG is able to properly work with a jar file and extract out tests from it. Earlier we had a pre-built jar that was checked-in to the codebase and the tests were working with it. Then I came to know that I could use ShrinkWrap to dynamically create a jar.

Here's the version information that I am working with

• org.jboss.shrinkwrap:shrinkwrap-api:1.2.6
• org.jboss.shrinkwrap:shrinkwrap-impl-base:1.2.6

I am trying to basically add a few resources to a jar that I am creating using ShrinkWrap. The addition of resources works fine when I build the code locally on my Mac. But when I attempt to build the code via Travis (Travis is basically used as the CI tool for the open source library TestNG), the build keeps failing with the following error

java.lang.IllegalArgumentException: src/test/resources/jarfileutils/testng-tests.xml was not found in any available ClassLoaders
  at org.jboss.shrinkwrap.impl.base.container.ContainerBase.addNestedJarFileResource(ContainerBase.java:811)
  at org.jboss.shrinkwrap.impl.base.container.ContainerBase.addAsResource(ContainerBase.java:1150)
  at org.testng.jarfileutils.JarCreator.generateJar(JarCreator.java:34)
  at org.testng.JarFileUtilsTest.generateTestJar(JarFileUtilsTest.java:30)

Here's how my code looks like

public class JarCreator {
   public static File generateJar() throws IOException {
  File jarFile = File.createTempFile("testng", ".jar");
  ConfigurationBuilder builder = new ConfigurationBuilder();
  Configuration config = builder
  .classLoaders(Collections.singletonList(Thread.currentThread().getContextClassLoader()))
  .build();
  JavaArchive archive = ShrinkWrap
  .createDomain(config)
  .getArchiveFactory()
  .create(JavaArchive.class, "testng-tests.jar")
  .addClasses(getTestClasses());
   for (String resource : getResources()) {
  archive = archive.addAsResource(getFile(resource), new BasicPath(resource));
  }
  archive.as(ZipExporter.class).exportTo(jarFile, true);
   return jarFile;
  }

   private static File getFile(String resource) {
   return new File("src/test/resources/" + resource);
  }

   private static Class[] getTestClasses() {
   return new Class[]{
  SampleTest1.class,
  SampleTest2.class,
  SampleTest3.class,
  SampleTest4.class,
  SampleTest5.class   };
  }

   private static List getResources() {
   return Arrays.asList(
   "jarfileutils/testng-tests.xml",
   "jarfileutils/child.xml",
   "jarfileutils/child/child.xml",
   "jarfileutils/child/childofchild/childofchild.xml",
   "jarfileutils/childofchild/childofchild.xml"   );
  }
}

Here's how my folder structure looks like in src/test/resources

08:56 $ tree src/test/resources/jarfileutils/
src/test/resources/jarfileutils/
├── child
│   ├── child.xml
│   └── childofchild
│       └── childofchild.xml
├── child.xml
├── childofchild
│   └── childofchild.xml
└── testng-tests.xml

Can someone please let me know, if my code for creating a simple jar is correct or not.

I have tried to examine the jar that gets created and it seems ok to me. But I dont know why I get the error only on Travis.

In case anyone is interested, here's the complete travis log : https://api.travis-ci.org/v3/job/357213270/log.txt