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# ==================================================================================================================== #
# _____ _ _ ____ _ #
# _ __ _ |_ _|__ ___ | (_)_ __ __ _ / ___|_ __ __ _ _ __ | |__ #
# | '_ \| | | || |/ _ \ / _ \| | | '_ \ / _` || | _| '__/ _` | '_ \| '_ \ #
# | |_) | |_| || | (_) | (_) | | | | | | (_| || |_| | | | (_| | |_) | | | | #
# | .__/ \__, ||_|\___/ \___/|_|_|_| |_|\__, (_)____|_| \__,_| .__/|_| |_| #
# |_| |___/ |___/ |_| #
# ==================================================================================================================== #
# Authors: #
# Patrick Lehmann #
# #
# License: #
# ==================================================================================================================== #
# Copyright 2017-2025 Patrick Lehmann - Bötzingen, Germany #
# #
# Licensed under the Apache License, Version 2.0 (the "License"); #
# you may not use this file except in compliance with the License. #
# You may obtain a copy of the License at #
# #
# http://www.apache.org/licenses/LICENSE-2.0 #
# #
# Unless required by applicable law or agreed to in writing, software #
# distributed under the License is distributed on an "AS IS" BASIS, #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. #
# See the License for the specific language governing permissions and #
# limitations under the License. #
# #
# SPDX-License-Identifier: Apache-2.0 #
# ==================================================================================================================== #
#
"""Performance tests for pyTooling.Graph."""
from pathlib import Path
import networkx.exception
from networkx import DiGraph as nx_DiGraph, dfs_preorder_nodes, bfs_predecessors, shortest_path
from . import PerformanceTest
if __name__ == "__main__": # pragma: no cover
print("ERROR: you called a testcase declaration file as an executable module.")
print("Use: 'python -m unittest <testcase module>'")
exit(1)
class Graph(PerformanceTest):
def test_AddEdge_Flat(self) -> None:
def wrapper(count: int):
def func():
g = nx_DiGraph()
g.add_node(0)
for i in range(1, count):
g.add_edge(0, i)
return func
self.runSizedTests(wrapper, self.counts)
def test_AddEdge_Linear(self) -> None:
def wrapper(count: int):
def func():
g = nx_DiGraph()
prev = 0
g.add_node(prev)
for i in range(1, count):
g.add_edge(prev, i)
prev = i
return func
self.runSizedTests(wrapper, self.counts)
class RandomGraph(PerformanceTest):
def ConstructGraphFromEdgeListFile(self, file: Path, vertexCount: int) -> nx_DiGraph:
graph = nx_DiGraph()
for v in range(vertexCount):
graph.add_node(v)
with file.open("r", encoding="utf-8") as f:
for line in f.readlines():
v, u, w = line.split(" ")
graph.add_edge(int(v), int(u), weight=int(w))
return graph
def test_BFS(self) -> None:
def wrapper(graph: nx_DiGraph, componentStartVertex: int, componentSize: int):
def func():
bfsList = [v for v in bfs_predecessors(graph, componentStartVertex)]
self.assertEqual(componentSize - 1, len(bfsList))
return func
self.runFileBasedTests(self.ConstructGraphFromEdgeListFile, wrapper, self.edgeFiles)
def test_DFS(self) -> None:
def wrapper(graph: nx_DiGraph, componentStartVertex: int, componentSize: int):
def func():
dfsList = [v for v in dfs_preorder_nodes(graph, componentStartVertex)]
self.assertEqual(componentSize, len(dfsList))
return func
self.runFileBasedTests(self.ConstructGraphFromEdgeListFile, wrapper, self.edgeFiles)
def test_ShortestPathByHops(self) -> None:
def wrapper(graph: nx_DiGraph, componentStartVertex: int, componentSize: int):
def func():
try:
vertexPath = shortest_path(graph, 49, 20)
except networkx.exception.NetworkXNoPath:
pass
# print(f"path length: {len(vertexPath)}")
# self.assertEqual(6, len(vertexPath))
return func
self.runFileBasedTests(self.ConstructGraphFromEdgeListFile, wrapper, self.edgeFiles)
def test_ShortestPathByWeight(self) -> None:
def wrapper(graph: nx_DiGraph, componentStartVertex: int, componentSize: int):
def func():
try:
vertexPath = shortest_path(graph, 49, 20, "weight")
except networkx.exception.NetworkXNoPath:
pass
# print(f"path length: {len(vertexPath)}")
# self.assertEqual(6, len(vertexPath))
return func
self.runFileBasedTests(self.ConstructGraphFromEdgeListFile, wrapper, self.edgeFiles)
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