def testWithOddElems(self):
     self.assertEqual(duplElems([1,2,3]),[1,1,2,2,3,3])
 def testEmptyList(self):
     self.assertEqual(duplElems([]),[])
 def testWithOneElem(self):
     self.assertEqual(duplElems([1]),[1,1])
 def testWithEvenElems(self):
     self.assertEqual(duplElems([1,2,3,4]),[1,1,2,2,3,3,4,4])