@Test(expected = IOException.class)
 public void testPrepareConfigFilesThrowsExceptionWhenUnzipFailed() throws IOException {
   doThrow(IOException.class)
       .when(archiverService)
       .unzip(Mockito.<InputStream>any(), Mockito.anyBoolean());
   yarnConfigFilesProvider.prepareConfigFiles();
 }
 @Test(expected = IOException.class)
 public void testPrepareConfigFilesThrowsExceptionWithWrongBase64FileContent() throws IOException {
   when(yarnVcapServiceReader.getConfigZipFiles()).thenReturn(inCorrectBase64FilesContent);
   yarnConfigFilesProvider.prepareConfigFiles();
 }
 @Test
 public void testPrepareConfigFilesSuccess() throws IOException {
   yarnConfigFilesProvider.prepareConfigFiles();
 }