two version of R2R are here HEAD master

1 files changed, 168 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/networkx/readwrite/tests/test_graph6.py b/.venv/lib/python3.12/site-packages/networkx/readwrite/tests/test_graph6.py
new file mode 100644
index 00000000..a8032694
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/networkx/readwrite/tests/test_graph6.py
@@ -0,0 +1,168 @@
+from io import BytesIO
+
+import pytest
+
+import networkx as nx
+import networkx.readwrite.graph6 as g6
+from networkx.utils import edges_equal, 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"
+
+    @pytest.mark.parametrize("G", (nx.MultiGraph(), nx.DiGraph()))
+    def test_no_directed_or_multi_graphs(self, G):
+        with pytest.raises(nx.NetworkXNotImplemented):
+            nx.write_graph6(G, 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, tmp_path):
+        with open(tmp_path / "test.g6", "w+b") as f:
+            g6.write_graph6_file(nx.null_graph(), f)
+            f.seek(0)
+            assert f.read() == b">>graph6<<?\n"
+
+    @pytest.mark.parametrize("edge", ((0, 1), (1, 2), (1, 42)))
+    def test_relabeling(self, edge):
+        G = nx.Graph([edge])
+        f = BytesIO()
+        nx.write_graph6(G, f)
+        f.seek(0)
+        assert f.read() == b">>graph6<<A_\n"
+
+
+class TestToGraph6Bytes:
+    def test_null_graph(self):
+        G = nx.null_graph()
+        assert g6.to_graph6_bytes(G) == b">>graph6<<?\n"
+
+    def test_trivial_graph(self):
+        G = nx.trivial_graph()
+        assert g6.to_graph6_bytes(G) == b">>graph6<<@\n"
+
+    def test_complete_graph(self):
+        assert g6.to_graph6_bytes(nx.complete_graph(4)) == b">>graph6<<C~\n"
+
+    def test_large_complete_graph(self):
+        G = nx.complete_graph(67)
+        assert g6.to_graph6_bytes(G, header=False) == b"~?@B" + b"~" * 368 + b"w\n"
+
+    def test_no_header(self):
+        G = nx.complete_graph(4)
+        assert g6.to_graph6_bytes(G, header=False) == b"C~\n"
+
+    def test_complete_bipartite_graph(self):
+        G = nx.complete_bipartite_graph(6, 9)
+        assert g6.to_graph6_bytes(G, header=False) == b"N??F~z{~Fw^_~?~?^_?\n"
+
+    @pytest.mark.parametrize("G", (nx.MultiGraph(), nx.DiGraph()))
+    def test_no_directed_or_multi_graphs(self, G):
+        with pytest.raises(nx.NetworkXNotImplemented):
+            g6.to_graph6_bytes(G)
+
+    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)
+            # Strip the trailing newline.
+            gstr = g6.to_graph6_bytes(G, header=False).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)
+            data = g6.to_graph6_bytes(G)
+            H = nx.from_graph6_bytes(data.rstrip())
+            assert nodes_equal(G.nodes(), H.nodes())
+            assert edges_equal(G.edges(), H.edges())
+
+    @pytest.mark.parametrize("edge", ((0, 1), (1, 2), (1, 42)))
+    def test_relabeling(self, edge):
+        G = nx.Graph([edge])
+        assert g6.to_graph6_bytes(G) == b">>graph6<<A_\n"