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])