Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/tests/test_regular.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 import pytest |
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2 import networkx |
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3 import networkx as nx |
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4 |
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5 import networkx.algorithms.regular as reg |
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6 import networkx.generators as gen |
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7 |
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8 |
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9 class TestKFactor: |
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10 def test_k_factor_trivial(self): |
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11 g = gen.cycle_graph(4) |
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12 f = reg.k_factor(g, 2) |
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13 assert g.edges == f.edges |
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14 |
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15 def test_k_factor1(self): |
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16 g = gen.grid_2d_graph(4, 4) |
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17 g_kf = reg.k_factor(g, 2) |
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18 for edge in g_kf.edges(): |
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19 assert g.has_edge(edge[0], edge[1]) |
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20 for _, degree in g_kf.degree(): |
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21 assert degree == 2 |
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22 |
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23 def test_k_factor2(self): |
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24 g = gen.complete_graph(6) |
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25 g_kf = reg.k_factor(g, 3) |
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26 for edge in g_kf.edges(): |
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27 assert g.has_edge(edge[0], edge[1]) |
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28 for _, degree in g_kf.degree(): |
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29 assert degree == 3 |
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30 |
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31 def test_k_factor3(self): |
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32 g = gen.grid_2d_graph(4, 4) |
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33 with pytest.raises(nx.NetworkXUnfeasible): |
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34 reg.k_factor(g, 3) |
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35 |
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36 def test_k_factor4(self): |
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37 g = gen.lattice.hexagonal_lattice_graph(4, 4) |
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38 # Perfect matching doesn't exist for 4,4 hexagonal lattice graph |
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39 with pytest.raises(nx.NetworkXUnfeasible): |
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40 reg.k_factor(g, 2) |
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41 |
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42 def test_k_factor5(self): |
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43 g = gen.complete_graph(6) |
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44 # small k to exercise SmallKGadget |
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45 g_kf = reg.k_factor(g, 2) |
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46 for edge in g_kf.edges(): |
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47 assert g.has_edge(edge[0], edge[1]) |
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48 for _, degree in g_kf.degree(): |
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49 assert degree == 2 |
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50 |
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51 |
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52 class TestIsRegular: |
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53 def test_is_regular1(self): |
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54 g = gen.cycle_graph(4) |
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55 assert reg.is_regular(g) |
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56 |
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57 def test_is_regular2(self): |
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58 g = gen.complete_graph(5) |
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59 assert reg.is_regular(g) |
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60 |
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61 def test_is_regular3(self): |
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62 g = gen.lollipop_graph(5, 5) |
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63 assert not reg.is_regular(g) |
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64 |
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65 |
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66 class TestIsKRegular: |
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67 def test_is_k_regular1(self): |
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68 g = gen.cycle_graph(4) |
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69 assert reg.is_k_regular(g, 2) |
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70 assert not reg.is_k_regular(g, 3) |
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71 |
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72 def test_is_k_regular2(self): |
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73 g = gen.complete_graph(5) |
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74 assert reg.is_k_regular(g, 4) |
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75 assert not reg.is_k_regular(g, 3) |
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76 assert not reg.is_k_regular(g, 6) |
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77 |
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78 def test_is_k_regular3(self): |
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79 g = gen.lollipop_graph(5, 5) |
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80 assert not reg.is_k_regular(g, 5) |
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81 assert not reg.is_k_regular(g, 6) |