Implement findResource

[GoogleCodeExporter]

I noted from the source that the powermock MockClassLoader doesn't
implement the findResource function. I'm not really familiar with how
classloaders work, but checking the javadocs state that "Class loader
implementations should override this method to specify where to find
resources."

http://java.sun.com/j2se/1.5.0/docs/api/java/lang/ClassLoader.html#findResource(
java.lang.String)

My guess on this is that the powermock classloader fails to find the
resource, the request is passed to the parent classloader. In eclipse,
the parent classloader contains the whole project in the classpath, so
it finds the resource. But when running from Ant, the parent
classloader knows nothing about the project classpath and therefore
can't find the resource.

Original issue reported on code.google.com by johan.ha...@gmail.com on 28 Aug 2009 at 9:50

[GoogleCodeExporter]

From Hege:

It seems that trying to load resources from the classpath fails when
I'm using PowerMock. I always get null from getResourceAsStream(). I
have (dummy) test case to show the problem:

@RunWith(PowerMockRunner.class)
@PrepareForTest({Demo.class})
public class DemoTest {
       @Test
       public void testGetResource() {
               InputStream is = getClass().getResourceAsStream("test.properties");
               Assert.assertNotNull("Resource stream should be found", is);
       }
}

The test will fail when the powermock annotations are in place, but
works if they are removed. Do you have any ideas what is causing this?
Probably something in the PowerMock class loader?

I did already figure out a workaround. I put the resource to another
package, and add @PowerMockIgnore to ignore that package. Then I can
use some dummy class in that package to load the resources. But I'd
rather have it working from the same package :)

Original comment by johan.ha...@gmail.com on 28 Aug 2009 at 9:51

[GoogleCodeExporter]

Geoff Hartnell has made it work with this solution:

 /* The search path for classes and resources */
   private URLClassPath ucp;

   // and in the constructor
       // initialise ucp for findResource
       ucp = sun.misc.Launcher.getBootstrapClassPath();

   /**
    * Finds the resource with the specified name on the search path.
    *
    * @param name the name of the resource
    * @return a <code>URL</code> for the resource, or <code>null</
code>
    * if the resource could not be found.
    */
   public URL findResource(final String name) {
       URL url = getClass().getClassLoader().getResource(name);
       if (url != null && ucp != null)
       {
           // System.out.println("MockCLassLoader: URL is " +
           //    (url != null ? "valid " : "null") + " for resource "
+ name);
           return ucp.checkURL(url);
       }
       return null;
   }

Original comment by johan.ha...@gmail.com on 18 Nov 2009 at 9:36

• Changed title: Implement findResource
• Added labels: Milestone-Release1.4
• Removed labels: Milestone-Future

[GoogleCodeExporter]

Since the solution above is using non-standard classes an attempt has been made 
to
just invoke the findResource of the deferred classloader.

Original comment by johan.ha...@gmail.com on 8 Dec 2009 at 10:16

[GoogleCodeExporter]

This fixed the problem

Original comment by johan.ha...@gmail.com on 9 Dec 2009 at 10:22

• Changed state: Fixed

[GoogleCodeExporter]

I have the same problem (resources from a jar aren't read)in the last version 
of powermock (1.4.10) ... Do I have to use the same workaround????

thanks

Original comment by amanriqu...@gmail.com on 18 Oct 2011 at 11:06

[GoogleCodeExporter]

As user avobe says, I'm having same issue. But the workaround is easier:
in 'junit' task, use the parameter 'fork="true"', and won't be used the ANT 
JavaVM.

Original comment by useyour....@gmail.com on 20 Jul 2012 at 10:33

[GoogleCodeExporter]

I am also having this issue in an eclipse environment.
Unable to resolve a resource whereas when not using the the powermock runnr it 
works fine.

Original comment by sgandon on 7 Dec 2012 at 12:29

[GoogleCodeExporter]

I found a way around this issue in an OSGI environment.
the idea is to get an OSGI classloader to find the resources.
so for a class that is being tested with the PowerMockRunner you can get the 
initial classloader 
getClass().getClassLoader().getClass().getClassLoader()
so if you you want a stream on a resource you can do this.
getClass().getClassLoader().getClass().getClassLoader()
                .getResourceAsStream("/bundle/path/to/resource");
or to make it a little smaller
getClass().getClassLoader().getClass()
                .getResourceAsStream("/bundle/path/to/resource");
I also found that many OSGI APIs such as FrameworkUtil.getBundle (Class<T> 
clazz) do not work in classes loaded with PowerMock.
I really hope Power mock get's OSGIfied some time soon.

Original comment by sgandon on 10 Dec 2012 at 1:58

[GoogleCodeExporter]

Unfortunately this will probably not happen any time soon unless someone helps 
out with it :( You're very welcome to do so if you want.

Original comment by johan.ha...@gmail.com on 10 Dec 2012 at 2:32