@Test
public void testIsArchive() {

  ClassLoader classLoader = getClass().getClassLoader();
  File file1 = new File(classLoader.getResource("test.zip").getFile());
  File file2 = new File(classLoader.getResource("test.tar").getFile());
  File file3 = new File(classLoader.getResource("test.tar.gz").getFile());
  assertTrue(Utils.isArchive(file1.getAbsolutePath()));
  assertTrue(Utils.isArchive(file2.getAbsolutePath()));
  assertTrue(Utils.isArchive(file3.getAbsolutePath()));
}