Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/generators/tests/test_stochastic.py @ 0:4f3585e2f14b draft default tip
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author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """Unit tests for the :mod:`networkx.generators.stochastic` module.""" |
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2 import pytest |
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3 import networkx as nx |
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4 |
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5 |
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6 class TestStochasticGraph: |
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7 """Unit tests for the :func:`~networkx.stochastic_graph` function. |
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8 |
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9 """ |
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10 |
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11 def test_default_weights(self): |
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12 G = nx.DiGraph() |
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13 G.add_edge(0, 1) |
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14 G.add_edge(0, 2) |
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15 S = nx.stochastic_graph(G) |
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16 assert nx.is_isomorphic(G, S) |
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17 assert sorted(S.edges(data=True)) == [ |
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18 (0, 1, {"weight": 0.5}), |
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19 (0, 2, {"weight": 0.5}), |
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20 ] |
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21 |
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22 def test_in_place(self): |
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23 """Tests for an in-place reweighting of the edges of the graph. |
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24 |
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25 """ |
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26 G = nx.DiGraph() |
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27 G.add_edge(0, 1, weight=1) |
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28 G.add_edge(0, 2, weight=1) |
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29 nx.stochastic_graph(G, copy=False) |
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30 assert sorted(G.edges(data=True)) == [ |
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31 (0, 1, {"weight": 0.5}), |
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32 (0, 2, {"weight": 0.5}), |
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33 ] |
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34 |
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35 def test_arbitrary_weights(self): |
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36 G = nx.DiGraph() |
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37 G.add_edge(0, 1, weight=1) |
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38 G.add_edge(0, 2, weight=1) |
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39 S = nx.stochastic_graph(G) |
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40 assert sorted(S.edges(data=True)) == [ |
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41 (0, 1, {"weight": 0.5}), |
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42 (0, 2, {"weight": 0.5}), |
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43 ] |
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44 |
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45 def test_multidigraph(self): |
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46 G = nx.MultiDiGraph() |
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47 G.add_edges_from([(0, 1), (0, 1), (0, 2), (0, 2)]) |
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48 S = nx.stochastic_graph(G) |
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49 d = dict(weight=0.25) |
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50 assert sorted(S.edges(data=True)) == [ |
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51 (0, 1, d), |
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52 (0, 1, d), |
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53 (0, 2, d), |
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54 (0, 2, d), |
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55 ] |
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56 |
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57 def test_graph_disallowed(self): |
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58 with pytest.raises(nx.NetworkXNotImplemented): |
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59 nx.stochastic_graph(nx.Graph()) |
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60 |
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61 def test_multigraph_disallowed(self): |
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62 with pytest.raises(nx.NetworkXNotImplemented): |
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63 nx.stochastic_graph(nx.MultiGraph()) |