Add more utils tests (bipartite).

Author: Oliver Scott

tests/utils/__init__.py

@@ -1,3 +1,5 @@
 """
 scaffoldgraph tests.utils
 """
+
+from .. import mock_sdf, mock_sdf_2

tests/utils/test_aggregate.py

@@ -5,7 +5,7 @@
 import scaffoldgraph as sg
 
 from scaffoldgraph.utils import aggregate
-from .. import mock_sdf, mock_sdf_2
+from . import mock_sdf, mock_sdf_2
 
 
 def test_aggregate(sdf_file, sdf_file_2):

tests/utils/test_bipartite.py

@@ -0,0 +1,15 @@
+"""
+scaffoldgraph tests.utils.test_bipartite
+"""
+
+import scaffoldgraph as sg
+import networkx as nx
+
+from scaffoldgraph.utils.bipartite import make_bipartite_graph
+from . import mock_sdf
+
+
+def test_bipartite(sdf_file):
+    network = sg.ScaffoldNetwork.from_sdf(sdf_file)
+    biparite = make_bipartite_graph(network)
+    assert nx.is_bipartite(biparite)