Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/networkx/algorithms/tree/tests/test_operations.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.algorithms.tree.operations` module. |
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2 |
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3 """ |
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4 |
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5 import networkx as nx |
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6 from networkx.testing import assert_nodes_equal |
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7 from networkx.testing import assert_edges_equal |
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8 |
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9 |
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10 class TestJoin: |
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11 """Unit tests for the :func:`networkx.tree.join` function.""" |
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12 |
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13 def test_empty_sequence(self): |
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14 """Tests that joining the empty sequence results in the tree |
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15 with one node. |
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16 |
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17 """ |
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18 T = nx.join([]) |
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19 assert len(T) == 1 |
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20 assert T.number_of_edges() == 0 |
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21 |
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22 def test_single(self): |
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23 """Tests that joining just one tree yields a tree with one more |
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24 node. |
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25 |
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26 """ |
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27 T = nx.empty_graph(1) |
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28 actual = nx.join([(T, 0)]) |
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29 expected = nx.path_graph(2) |
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30 assert_nodes_equal(list(expected), list(actual)) |
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31 assert_edges_equal(list(expected.edges()), list(actual.edges())) |
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32 |
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33 def test_basic(self): |
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34 """Tests for joining multiple subtrees at a root node.""" |
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35 trees = [(nx.full_rary_tree(2, 2 ** 2 - 1), 0) for i in range(2)] |
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36 actual = nx.join(trees) |
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37 expected = nx.full_rary_tree(2, 2 ** 3 - 1) |
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38 assert nx.is_isomorphic(actual, expected) |