def testHeapIncreaseKey(self):
"""This test will verify that the resulting array
is not a max heap and it will fail. The resulting 100
breaks the heap property."""
theList = [5, 7, 9, 1, 3, 13, 21, 43, 2, 42, 12, 8, 77, 65, 23]
MaxHeapPriorityQueue.buildMaxHeap(theList)
MaxHeapPriorityQueue.increaseKey(theList, 4, 100)
expected = [77, 43, 65, 7, 100, 13, 23, 1, 2, 3, 12, 8, 9, 21, 5]
self.assertNotEqual(expected, theList)
def testHeapIncreaseKeyHoldHeapProperty(self):
"""This test will verify that the resulting array
is a max heap after a key is increased, thus maintaining
the heap property."""
theList = [5, 7, 9, 1, 3, 13, 21, 43, 2, 42, 12, 8, 77, 65, 23]
MaxHeapPriorityQueue.buildMaxHeap(theList)
MaxHeapPriorityQueue.increaseKey(theList, 4, 100)
expected = [100, 77, 65, 7, 43, 13, 23, 1, 2, 3, 12, 8, 9, 21, 5]
self.assertEqual(expected, theList)
class Main:
a = [5, 7, 9, 1, 3, 13, 21, 43, 2, 42, 12, 8, 77, 65, 23]
print(str(a) + " - Starting List\n")
mh = MaxHeapPriorityQueue.buildMaxHeap(a)
print(str(mh) + " - Max Heap\n\n")
print("Now lets extract the max value")
maxV = MaxHeapPriorityQueue.extractMax(mh)
print(str(maxV) + " - Extracted max value ")
print(str(mh) + " - Max heap after extraction\n\n")
a = [5, 7, 9, 1, 3, 13, 21, 43, 2, 42, 12, 8, 77, 65, 23]
mh = MaxHeapPriorityQueue.buildMaxHeap(a)
print(
"Now lets increase index 4 to 100 and then call build max heap again")
print(MaxHeapPriorityQueue.increaseKey(mh, 4, 100))
MaxHeapPriorityQueue.buildMaxHeap(mh)
print(
str(mh) +
" - Max heap after index 4 was changed and heap was restored\n\n")
a = [5, 7, 9, 1, 3, 13, 21, 43, 2, 42, 12, 8, 77, 65, 23]
mh = MaxHeapPriorityQueue.buildMaxHeap(a)
print("Now lets increase index 9 to 1")
print(MaxHeapPriorityQueue.increaseKey(mh, 9, 1))
print("This error occurs because the key is smaller than current key\n\n")
print("We will now insert 26 into the heap")
MaxHeapPriorityQueue.insert(mh, 26)
print(str(mh) + "\n\n\n")
a = [21, 7, 9, 1, 3, 13, 21, 43, 2, 42, 12, 8, 77, 65, 23]
print(a)
print(MaxHeapPriorityQueue.getMaximum(a))
print(a)