Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/components/tests/test_semiconnected.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 from itertools import chain |
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2 import networkx as nx |
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3 import pytest |
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4 |
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5 |
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6 class TestIsSemiconnected: |
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7 def test_undirected(self): |
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8 pytest.raises(nx.NetworkXNotImplemented, nx.is_semiconnected, nx.Graph()) |
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9 pytest.raises(nx.NetworkXNotImplemented, nx.is_semiconnected, nx.MultiGraph()) |
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10 |
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11 def test_empty(self): |
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12 pytest.raises(nx.NetworkXPointlessConcept, nx.is_semiconnected, nx.DiGraph()) |
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13 pytest.raises( |
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14 nx.NetworkXPointlessConcept, nx.is_semiconnected, nx.MultiDiGraph() |
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15 ) |
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16 |
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17 def test_single_node_graph(self): |
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18 G = nx.DiGraph() |
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19 G.add_node(0) |
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20 assert nx.is_semiconnected(G) |
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21 |
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22 def test_path(self): |
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23 G = nx.path_graph(100, create_using=nx.DiGraph()) |
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24 assert nx.is_semiconnected(G) |
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25 G.add_edge(100, 99) |
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26 assert not nx.is_semiconnected(G) |
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27 |
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28 def test_cycle(self): |
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29 G = nx.cycle_graph(100, create_using=nx.DiGraph()) |
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30 assert nx.is_semiconnected(G) |
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31 G = nx.path_graph(100, create_using=nx.DiGraph()) |
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32 G.add_edge(0, 99) |
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33 assert nx.is_semiconnected(G) |
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34 |
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35 def test_tree(self): |
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36 G = nx.DiGraph() |
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37 G.add_edges_from( |
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38 chain.from_iterable([(i, 2 * i + 1), (i, 2 * i + 2)] for i in range(100)) |
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39 ) |
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40 assert not nx.is_semiconnected(G) |
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41 |
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42 def test_dumbbell(self): |
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43 G = nx.cycle_graph(100, create_using=nx.DiGraph()) |
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44 G.add_edges_from((i + 100, (i + 1) % 100 + 100) for i in range(100)) |
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45 assert not nx.is_semiconnected(G) # G is disconnected. |
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46 G.add_edge(100, 99) |
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47 assert nx.is_semiconnected(G) |
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48 |
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49 def test_alternating_path(self): |
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50 G = nx.DiGraph( |
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51 chain.from_iterable([(i, i - 1), (i, i + 1)] for i in range(0, 100, 2)) |
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52 ) |
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53 assert not nx.is_semiconnected(G) |