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TestsForFibHeap.py
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from FibHeap import *
# Some __methods have been since renamed _methods; so you'll need to change that here too.
class DKTests_FibHeap(FibHeap):
def insert(self, new_ele):
# Inserting the newnode at the end of the root list.
new_node = FibHeapNode(new_ele)
self._FibHeap__insert_node(new_node)
return new_node
def print_details(mylist):
for node in mylist:
print(node, node.parent, node.left, node.right, node.child, node.rank, node.mark)
def decrease_key_test_1():
heap = DKTests_FibHeap()
addrs = [heap.insert(i) for i in [20]]
heap.print_heap()
try:
heap.decrease_key(addrs[0], 30)
except ValueError as err:
print(err)
heap.decrease_key(addrs[0], 19)
heap.print_heap()
def decrease_key_test_2():
heap = DKTests_FibHeap()
addrs = [heap.insert(i) for i in [40, 12, 18]]
heap.print_heap()
heap.decrease_key(addrs[0], 20)
heap.print_heap()
heap.decrease_key(addrs[2], 11)
heap.print_heap()
def decrease_key_test_3():
heap = DKTests_FibHeap()
addrs = [heap.insert(i) for i in [40, 12, 10]]
heap.extract_min()
heap.print_heap()
heap.decrease_key(addrs[0], 20)
heap.print_heap()
heap.decrease_key(addrs[0], 11)
heap.print_heap()
def decrease_key_test_4():
heap = DKTests_FibHeap()
addrs = [heap.insert(i) for i in [0, 30, 10, 20, 25]]
heap.extract_min()
heap.print_heap()
heap.decrease_key(addrs[4], -INFINITY)
heap.extract_min()
heap.print_heap()
# Heap looks like (10(20, 30)) now.
heap.decrease_key(addrs[3], -20)
heap.print_heap()
print_details(addrs)
decrease_key_test_4()
def decrease_key_test_5():
heap = DKTests_FibHeap()
addrs = [heap.insert(i) for i in [0, 30, 10, 20, 25]]
print(addrs)
heap.extract_min()
heap.decrease_key(addrs[4], -INFINITY)
heap.extract_min()
heap.print_heap()
addrs += [heap.insert(j) for j in [40, 70, 50, 1]]
heap.extract_min()
heap.print_heap()
heap.decrease_key(addrs[3], 5)
heap.print_heap()
heap.decrease_key(addrs[1], 5)
heap.print_heap()
heap.extract_min()
heap.print_heap()
def decrease_key_test_6():
heap = DKTests_FibHeap()
addrs = [heap.insert(i) for i in [0, 30, 10, 20, 25]]
print(addrs)
heap.extract_min()
heap.decrease_key(addrs[4], -INFINITY)
heap.extract_min()
addrs += [heap.insert(j) for j in [40, 70, 50, 1]]
heap.extract_min()
heap.print_heap()
heap.decrease_key(addrs[2], -10)
heap.print_heap()
heap.decrease_key(addrs[1], -30)
heap.print_heap()
print_details(addrs)
def decrease_key_test_7():
# Testing whether cascade cut works
heap = DKTests_FibHeap()
"""
(0, 28), (1, 60), (2, -8), (3, -6), (4, -15), (5, -36),
(6, 46), (7, 34), (8, -7), (9, 5), (10, -54), (11, -18),
(12, -18), (13, 50), (14, 51), (15, -19), (16, -44),
(17, -24), (18, 23), (19, 10),
"""
mylist = [28, 60, -8, -6, -15, -36, 46, 34, -7, 5, -27\
-27, -18, -18, 50, 51, -19, -44, -24, 23, 10]
addrs = [heap.insert(i) for i in mylist]
def deckey(ind):
print(f"Decreasing {addrs[ind].ele} to {addrs[ind].ele - 50}.")
heap.decrease_key(addrs[ind], addrs[ind].ele - 50)
heap.print_heap()
#input()
heap.extract_min()
heap.print_heap()
deckey(4)
deckey(3)
deckey(1)
deckey(0)
heap.extract_min()
heap.print_heap()
def extract_min_test(mylist):
heap = FibHeap()
for i in mylist:
heap.insert(i)
print("After all insertions:")
heap.print_heap()#
for x in range(len(mylist)):
print(f"After {x + 1}th extraction:")
heap.extract_min()
heap.print_heap()
try: heap.extract_min()
except IndexError as err:
if str(err) == "Popping from an empty heap.":
pass
else: raise IndexError(err)
extract_min_test_1 = lambda: extract_min_test([1, 2])
extract_min_test_2 = lambda: extract_min_test([1, 2, 3, 4])
extract_min_test_3 = lambda: extract_min_test([10, 20, 30, 40, 50, 60, 70, 80])
extract_min_test_4 = lambda: extract_min_test([8, 8, 2, 4, 1, 4, 2, 9, 10, 4, 2, 7])
extract_min_test_5 = lambda: extract_min_test([10])
extract_min_test_6 = lambda: extract_min_test([20, 10, 40, 28, 46, 10, 35, 26, 83, 18, 32, 46])
extract_min_test_7 = lambda: extract_min_test([])
def _FibHeap__remove_node_test_1():
heap = FibHeap()
for i in [1]:
heap.insert(i)
heap._FibHeap__remove_node(heap.head)
print(heap.head, heap.min_node)
assert heap.head is None
heap = FibHeap()
for i in [1, 2]:
heap.insert(i)
heap._FibHeap__remove_node(heap.head.right)
print(heap.head, heap.min_node, heap.head.right, heap.head.left)
heap = FibHeap()
for i in [1, 2]:
heap.insert(i)
heap._FibHeap__remove_node(heap.head.left)
print(heap.head, heap.min_node, heap.head.right, heap.head.left)
heap = FibHeap()
for i in [1, 2]:
heap.insert(i)
heap._FibHeap__remove_node(heap.head)
print(heap.head, heap.min_node, heap.head.right, heap.head.left)
def _FibHeap__remove_node_test_2():
heap = FibHeap()
mylist = [5, 3, 1, 7]
for i in mylist: heap.insert(i)
for j in range(len(mylist)):
heap._FibHeap__remove_node(heap.head)
heap.print_heap()
def _FibHeap__remove_node_test_3():
heap = FibHeap()
mylist = [5, 3, 1, 7]
for i in mylist: heap.insert(i)
for j in range(len(mylist)):
heap._FibHeap__remove_node(heap.head.right)
print(f"After {j+1}th removal:")
heap.print_heap()
def _FibHeap__remove_node_test_4():
heap = FibHeap()
mylist = [5, 3, 1, 7]
for i in mylist: heap.insert(i)
for j in range(len(mylist)):
heap._FibHeap__remove_node(heap.head.left)
print(f"After {j+1}th removal:")
heap.print_heap()
def _FibHeap__remove_node_test_5():
heap = FibHeap()
mylist = None
def revert_to_initial():
nonlocal mylist, heap
mylist = [5, 3, 1, 7]
heap = FibHeap()
for i in mylist: heap.insert(i)
revert_to_initial()
heap._FibHeap__remove_node(heap.head.right.right)
print("New case: ")
heap.print_heap()
revert_to_initial()
heap._FibHeap__remove_node(heap.head)#.right.left)
print("New case: ")
heap.print_heap()
revert_to_initial()
heap._FibHeap__remove_node(heap.head.left.left)
print("New case: ")
heap.print_heap()
revert_to_initial()
heap._FibHeap__remove_node(heap.head)
heap._FibHeap__remove_node(heap.head.right)
heap._FibHeap__remove_node(heap.head.left)
print("New case: ")
heap.print_heap()
def insert_test_1():
heap = FibHeap()
for i in [8, 9, 4, 2, 1]:
heap.insert(i)
print(f"Minimum = {heap.min_node}")
heap.print_heap()
def merge_test_1():
heap = FibHeap()
for i in [8, 9, 4, 2, 1]:
heap.insert(i)
heap2 = FibHeap()
for i in [4, 3, 0, 7]:
heap2.insert(i)
heap.merge(heap2)
print("min = ", heap.min_node)
heap.print_heap()
print("min = ", heap2.min_node)
heap2.print_heap()
def merge_test_2():
heap = FibHeap()
for i in [8, 9, 4, 2, 1]:
heap.insert(i)
heap2 = FibHeap()
for i in [4, 3, 0, 7]:
heap2.insert(i)
heap2.merge(heap)
print("min = ", heap.min_node)
heap.print_heap()
print("min = ", heap2.min_node)
heap2.print_heap()