def test_extend(self):
"""
Test the extend method
"""
dlist = DiskList()
dlist.extend(['0', '1', '2', '3'])
self.assertTrue(len(dlist) == 4)
def test_extend(self):
"""
Test the extend method
"""
dlist = DiskList()
dlist.extend(['0', '1', '2', '3'])
self.assertTrue(len(dlist) == 4)
