Mercurial > repos > shellac > sam_consensus_v3
diff env/lib/python3.9/site-packages/networkx/readwrite/tests/test_graph6.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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/env/lib/python3.9/site-packages/networkx/readwrite/tests/test_graph6.py Mon Mar 22 18:12:50 2021 +0000 @@ -0,0 +1,118 @@ +from io import BytesIO +import tempfile +import pytest + +import networkx as nx +import networkx.readwrite.graph6 as g6 +from networkx.testing.utils import assert_edges_equal +from networkx.testing.utils import assert_nodes_equal + + +class TestGraph6Utils: + def test_n_data_n_conversion(self): + for i in [0, 1, 42, 62, 63, 64, 258047, 258048, 7744773, 68719476735]: + assert g6.data_to_n(g6.n_to_data(i))[0] == i + assert g6.data_to_n(g6.n_to_data(i))[1] == [] + assert g6.data_to_n(g6.n_to_data(i) + [42, 43])[1] == [42, 43] + + +class TestFromGraph6Bytes: + def test_from_graph6_bytes(self): + data = b"DF{" + G = nx.from_graph6_bytes(data) + assert_nodes_equal(G.nodes(), [0, 1, 2, 3, 4]) + assert_edges_equal( + G.edges(), [(0, 3), (0, 4), (1, 3), (1, 4), (2, 3), (2, 4), (3, 4)] + ) + + def test_read_equals_from_bytes(self): + data = b"DF{" + G = nx.from_graph6_bytes(data) + fh = BytesIO(data) + Gin = nx.read_graph6(fh) + assert_nodes_equal(G.nodes(), Gin.nodes()) + assert_edges_equal(G.edges(), Gin.edges()) + + +class TestReadGraph6: + def test_read_many_graph6(self): + """Test for reading many graphs from a file into a list.""" + data = b"DF{\nD`{\nDqK\nD~{\n" + fh = BytesIO(data) + glist = nx.read_graph6(fh) + assert len(glist) == 4 + for G in glist: + assert sorted(G) == list(range(5)) + + +class TestWriteGraph6: + """Unit tests for writing a graph to a file in graph6 format.""" + + def test_null_graph(self): + result = BytesIO() + nx.write_graph6(nx.null_graph(), result) + assert result.getvalue() == b">>graph6<<?\n" + + def test_trivial_graph(self): + result = BytesIO() + nx.write_graph6(nx.trivial_graph(), result) + assert result.getvalue() == b">>graph6<<@\n" + + def test_complete_graph(self): + result = BytesIO() + nx.write_graph6(nx.complete_graph(4), result) + assert result.getvalue() == b">>graph6<<C~\n" + + def test_large_complete_graph(self): + result = BytesIO() + nx.write_graph6(nx.complete_graph(67), result, header=False) + assert result.getvalue() == b"~?@B" + b"~" * 368 + b"w\n" + + def test_no_header(self): + result = BytesIO() + nx.write_graph6(nx.complete_graph(4), result, header=False) + assert result.getvalue() == b"C~\n" + + def test_complete_bipartite_graph(self): + result = BytesIO() + G = nx.complete_bipartite_graph(6, 9) + nx.write_graph6(G, result, header=False) + # The expected encoding here was verified by Sage. + assert result.getvalue() == b"N??F~z{~Fw^_~?~?^_?\n" + + def test_no_directed_graphs(self): + with pytest.raises(nx.NetworkXNotImplemented): + nx.write_graph6(nx.DiGraph(), BytesIO()) + + def test_length(self): + for i in list(range(13)) + [31, 47, 62, 63, 64, 72]: + g = nx.random_graphs.gnm_random_graph(i, i * i // 4, seed=i) + gstr = BytesIO() + nx.write_graph6(g, gstr, header=False) + # Strip the trailing newline. + gstr = gstr.getvalue().rstrip() + assert len(gstr) == ((i - 1) * i // 2 + 5) // 6 + (1 if i < 63 else 4) + + def test_roundtrip(self): + for i in list(range(13)) + [31, 47, 62, 63, 64, 72]: + G = nx.random_graphs.gnm_random_graph(i, i * i // 4, seed=i) + f = BytesIO() + nx.write_graph6(G, f) + f.seek(0) + H = nx.read_graph6(f) + assert_nodes_equal(G.nodes(), H.nodes()) + assert_edges_equal(G.edges(), H.edges()) + + def test_write_path(self): + with tempfile.NamedTemporaryFile() as f: + g6.write_graph6_file(nx.null_graph(), f) + f.seek(0) + assert f.read() == b">>graph6<<?\n" + + def test_relabeling(self): + G = nx.Graph([(0, 1)]) + assert g6.to_graph6_bytes(G) == b">>graph6<<A_\n" + G = nx.Graph([(1, 2)]) + assert g6.to_graph6_bytes(G) == b">>graph6<<A_\n" + G = nx.Graph([(1, 42)]) + assert g6.to_graph6_bytes(G) == b">>graph6<<A_\n"