### Question:
IkonosProductReaderPlugin extends BaseProductReaderPlugIn { @Override public String[] getDefaultFileExtensions() { return IkonosConstants.DEFAULT_EXTENSIONS; } IkonosProductReaderPlugin(); @Override MetadataInspector getMetadataInspector(); @Override Class[] getInputTypes(); @Override ProductReader createReaderInstance(); @Override String[] getFormatNames(); @Override String[] getDefaultFileExtensions(); @Override String getDescription(Locale locale);  }### Answer:
@Test public void testFileExtensions() { final String[] fileExtension = plugIn.getDefaultFileExtensions(); assertNotNull(fileExtension); final List<String> extensionList = Arrays.asList(fileExtension); assertEquals(2, extensionList.size()); assertEquals(".xml", extensionList.get(0)); assertEquals(".zip", extensionList.get(1)); }