@Test
 public void testFileExtensions() {
   final String[] fileExtensions = plugIn.getDefaultFileExtensions();
   assertNotNull(fileExtensions);
   final List<String> extensionList = Arrays.asList(fileExtensions);
   assertEquals(2, extensionList.size());
   assertEquals(".xml", extensionList.get(0).toLowerCase());
   assertEquals(".zip", extensionList.get(1).toLowerCase());
 }
 @Test
 public void testProductFileFilter() {
   final SnapFileFilter snapFileFilter = plugIn.getProductFileFilter();
   assertNotNull(snapFileFilter);
   assertArrayEquals(plugIn.getDefaultFileExtensions(), snapFileFilter.getExtensions());
   assertEquals(plugIn.getFormatNames()[0], snapFileFilter.getFormatName());
   assertEquals(
       true, snapFileFilter.getDescription().contains(plugIn.getDescription(Locale.getDefault())));
 }