def test_answer_nonDecreasing(): assert insertionSort.nonDecreasing([5, 2, 4, 6, 1, 3]) == [6, 5, 4, 3, 2, 1]
def test_oneElement_nonDecreasing(): assert insertionSort.nonDecreasing([3]) == [3]
def test_twoElementIncorrectOrder_nonDecreasing(): assert insertionSort.nonDecreasing([3, 4]) == [4, 3]