@Test
public void testInvalidFSRoot() throws IOException
{

 File baseDir = new File(getTestResourceDir(), "/app1");
 File manifest = new File(baseDir, "META-INF/APPLICATION.MF");
 try {
     FileSystem.getFSRoot(manifest);
     fail("Should have thrown an IORuntimeException");
 } catch (IORuntimeException e) {
     // good!
 }
}