Fixed database typo and removed unnecessary class identifier.

venv/Lib/site-packages/networkx/readwrite/tests/test_p2g.py

@@ -0,0 +1,61 @@
+import networkx as nx
+import io
+from networkx.readwrite.p2g import read_p2g, write_p2g
+from networkx.testing import assert_edges_equal
+
+
+class TestP2G:
+    @classmethod
+    def setup_class(cls):
+        cls.G = nx.Graph(name="test")
+        e = [("a", "b"), ("b", "c"), ("c", "d"), ("d", "e"), ("e", "f"), ("a", "f")]
+        cls.G.add_edges_from(e)
+        cls.G.add_node("g")
+        cls.DG = nx.DiGraph(cls.G)
+
+    def test_read_p2g(self):
+        s = b"""\
+name
+3 4
+a
+1 2
+b
+
+c
+0 2
+"""
+        bytesIO = io.BytesIO(s)
+        G = read_p2g(bytesIO)
+        assert G.name == "name"
+        assert sorted(G) == ["a", "b", "c"]
+        edges = [(str(u), str(v)) for u, v in G.edges()]
+        assert_edges_equal(G.edges(), [("a", "c"), ("a", "b"), ("c", "a"), ("c", "c")])
+
+    def test_write_p2g(self):
+        s = b"""foo
+3 2
+1
+1 
+2
+2 
+3
+
+"""
+        fh = io.BytesIO()
+        G = nx.OrderedDiGraph()
+        G.name = "foo"
+        G.add_edges_from([(1, 2), (2, 3)])
+        write_p2g(G, fh)
+        fh.seek(0)
+        r = fh.read()
+        assert r == s
+
+    def test_write_read_p2g(self):
+        fh = io.BytesIO()
+        G = nx.DiGraph()
+        G.name = "foo"
+        G.add_edges_from([("a", "b"), ("b", "c")])
+        write_p2g(G, fh)
+        fh.seek(0)
+        H = read_p2g(fh)
+        assert_edges_equal(G.edges(), H.edges())