mirror of
https://github.com/TheAlgorithms/Python.git
synced 2024-11-24 13:31:07 +00:00
5b024f4dd5
* Fix a failing precommit test
* updating DIRECTORY.md
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
47 lines
1003 B
Python
47 lines
1003 B
Python
from collections import defaultdict
|
|
|
|
from graphs.minimum_spanning_tree_prims import PrimsAlgorithm as mst
|
|
|
|
|
|
def test_prim_successful_result():
|
|
num_nodes, num_edges = 9, 14 # noqa: F841
|
|
edges = [
|
|
[0, 1, 4],
|
|
[0, 7, 8],
|
|
[1, 2, 8],
|
|
[7, 8, 7],
|
|
[7, 6, 1],
|
|
[2, 8, 2],
|
|
[8, 6, 6],
|
|
[2, 3, 7],
|
|
[2, 5, 4],
|
|
[6, 5, 2],
|
|
[3, 5, 14],
|
|
[3, 4, 9],
|
|
[5, 4, 10],
|
|
[1, 7, 11],
|
|
]
|
|
|
|
adjancency = defaultdict(list)
|
|
for node1, node2, cost in edges:
|
|
adjancency[node1].append([node2, cost])
|
|
adjancency[node2].append([node1, cost])
|
|
|
|
result = mst(adjancency)
|
|
|
|
expected = [
|
|
[7, 6, 1],
|
|
[2, 8, 2],
|
|
[6, 5, 2],
|
|
[0, 1, 4],
|
|
[2, 5, 4],
|
|
[2, 3, 7],
|
|
[0, 7, 8],
|
|
[3, 4, 9],
|
|
]
|
|
|
|
for answer in expected:
|
|
edge = tuple(answer[:2])
|
|
reverse = tuple(edge[::-1])
|
|
assert edge in result or reverse in result
|