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55 lines
1.3 KiB
Python
55 lines
1.3 KiB
Python
import pytest
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from graphs.graphs_floyd_warshall import floyd_warshall
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def test_no_edges():
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graph = [
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[0, float("inf"), float("inf")],
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[float("inf"), 0, float("inf")],
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[float("inf"), float("inf"), 0],
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]
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expected = [
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[0, float("inf"), float("inf")],
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[float("inf"), 0, float("inf")],
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[float("inf"), float("inf"), 0],
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]
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dist, _ = floyd_warshall(graph, 3)
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assert dist == expected
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def test_example_input(capsys):
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num_vertices = 3
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graph = [
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[float("inf"), float("inf"), float("inf")],
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[float("inf"), float("inf"), float("inf")],
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[float("inf"), float("inf"), float("inf")],
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]
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for i in range(num_vertices):
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graph[i][i] = 0.0
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graph[0][1] = 2
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graph[1][0] = 1
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expected = [
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[0, 2, float("inf")],
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[1, 0, float("inf")],
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[float("inf"), float("inf"), 0],
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]
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dist, _ = floyd_warshall(graph, num_vertices)
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_ = capsys.readouterr()
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assert dist == expected
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def test_unreachable_vertices():
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graph = [
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[0, 1, float("inf")],
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[float("inf"), 0, 2],
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[float("inf"), float("inf"), 0],
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]
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expected = [[0, 1, 3], [float("inf"), 0, 2], [float("inf"), float("inf"), 0]]
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dist, _ = floyd_warshall(graph, 3)
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assert dist == expected
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if __name__ == "__main__":
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pytest.main()
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