131 lines
4.6 KiB
Python
131 lines
4.6 KiB
Python
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"""
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Pajek tests
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"""
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import os
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import tempfile
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import networkx as nx
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from networkx.utils import edges_equal, nodes_equal
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class TestPajek:
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@classmethod
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def setup_class(cls):
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cls.data = """*network Tralala\n*vertices 4\n 1 "A1" 0.0938 0.0896 ellipse x_fact 1 y_fact 1\n 2 "Bb" 0.8188 0.2458 ellipse x_fact 1 y_fact 1\n 3 "C" 0.3688 0.7792 ellipse x_fact 1\n 4 "D2" 0.9583 0.8563 ellipse x_fact 1\n*arcs\n1 1 1 h2 0 w 3 c Blue s 3 a1 -130 k1 0.6 a2 -130 k2 0.6 ap 0.5 l "Bezier loop" lc BlueViolet fos 20 lr 58 lp 0.3 la 360\n2 1 1 h2 0 a1 120 k1 1.3 a2 -120 k2 0.3 ap 25 l "Bezier arc" lphi 270 la 180 lr 19 lp 0.5\n1 2 1 h2 0 a1 40 k1 2.8 a2 30 k2 0.8 ap 25 l "Bezier arc" lphi 90 la 0 lp 0.65\n4 2 -1 h2 0 w 1 k1 -2 k2 250 ap 25 l "Circular arc" c Red lc OrangeRed\n3 4 1 p Dashed h2 0 w 2 c OliveGreen ap 25 l "Straight arc" lc PineGreen\n1 3 1 p Dashed h2 0 w 5 k1 -1 k2 -20 ap 25 l "Oval arc" c Brown lc Black\n3 3 -1 h1 6 w 1 h2 12 k1 -2 k2 -15 ap 0.5 l "Circular loop" c Red lc OrangeRed lphi 270 la 180"""
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cls.G = nx.MultiDiGraph()
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cls.G.add_nodes_from(["A1", "Bb", "C", "D2"])
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cls.G.add_edges_from(
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[
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("A1", "A1"),
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("A1", "Bb"),
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("A1", "C"),
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("Bb", "A1"),
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("C", "C"),
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("C", "D2"),
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("D2", "Bb"),
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]
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)
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cls.G.graph["name"] = "Tralala"
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(fd, cls.fname) = tempfile.mkstemp()
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with os.fdopen(fd, "wb") as fh:
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fh.write(cls.data.encode("UTF-8"))
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@classmethod
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def teardown_class(cls):
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os.unlink(cls.fname)
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def test_parse_pajek_simple(self):
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# Example without node positions or shape
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data = """*Vertices 2\n1 "1"\n2 "2"\n*Edges\n1 2\n2 1"""
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G = nx.parse_pajek(data)
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assert sorted(G.nodes()) == ["1", "2"]
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assert edges_equal(G.edges(), [("1", "2"), ("1", "2")])
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def test_parse_pajek(self):
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G = nx.parse_pajek(self.data)
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assert sorted(G.nodes()) == ["A1", "Bb", "C", "D2"]
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assert edges_equal(
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G.edges(),
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[
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("A1", "A1"),
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("A1", "Bb"),
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("A1", "C"),
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("Bb", "A1"),
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("C", "C"),
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("C", "D2"),
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("D2", "Bb"),
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],
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)
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def test_parse_pajet_mat(self):
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data = """*Vertices 3\n1 "one"\n2 "two"\n3 "three"\n*Matrix\n1 1 0\n0 1 0\n0 1 0\n"""
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G = nx.parse_pajek(data)
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assert set(G.nodes()) == {"one", "two", "three"}
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assert G.nodes["two"] == {"id": "2"}
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assert edges_equal(
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set(G.edges()),
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{("one", "one"), ("two", "one"), ("two", "two"), ("two", "three")},
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)
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def test_read_pajek(self):
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G = nx.parse_pajek(self.data)
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Gin = nx.read_pajek(self.fname)
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assert sorted(G.nodes()) == sorted(Gin.nodes())
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assert edges_equal(G.edges(), Gin.edges())
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assert self.G.graph == Gin.graph
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for n in G:
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assert G.nodes[n] == Gin.nodes[n]
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def test_write_pajek(self):
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import io
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G = nx.parse_pajek(self.data)
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fh = io.BytesIO()
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nx.write_pajek(G, fh)
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fh.seek(0)
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H = nx.read_pajek(fh)
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assert nodes_equal(list(G), list(H))
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assert edges_equal(list(G.edges()), list(H.edges()))
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# Graph name is left out for now, therefore it is not tested.
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# assert_equal(G.graph, H.graph)
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def test_ignored_attribute(self):
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import io
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G = nx.Graph()
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fh = io.BytesIO()
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G.add_node(1, int_attr=1)
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G.add_node(2, empty_attr=" ")
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G.add_edge(1, 2, int_attr=2)
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G.add_edge(2, 3, empty_attr=" ")
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import warnings
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with warnings.catch_warnings(record=True) as w:
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nx.write_pajek(G, fh)
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assert len(w) == 4
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def test_noname(self):
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# Make sure we can parse a line such as: *network
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# Issue #952
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line = "*network\n"
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other_lines = self.data.split("\n")[1:]
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data = line + "\n".join(other_lines)
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G = nx.parse_pajek(data)
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def test_unicode(self):
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import io
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G = nx.Graph()
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name1 = chr(2344) + chr(123) + chr(6543)
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name2 = chr(5543) + chr(1543) + chr(324)
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G.add_edge(name1, "Radiohead", foo=name2)
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fh = io.BytesIO()
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nx.write_pajek(G, fh)
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fh.seek(0)
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H = nx.read_pajek(fh)
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assert nodes_equal(list(G), list(H))
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assert edges_equal(list(G.edges()), list(H.edges()))
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assert G.graph == H.graph
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