Added tests for utils

Author: OliverBScott

tests/io/test_tsv.py

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+"""
+scaffoldgraph tests.utils
+"""

tests/utils/__init__.py

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+"""
+scaffoldgraph tests.utils.test_aggregate
+"""
+
+import scaffoldgraph as sg
+
+from scaffoldgraph.utils import aggregate
+from .. import mock_sdf, mock_sdf_2
+
+
+def test_aggregate(sdf_file, sdf_file_2):
+    net_1 = sg.ScaffoldNetwork.from_sdf(sdf_file)
+    net_2 = sg.ScaffoldNetwork.from_sdf(sdf_file_2)
+    network = aggregate([net_1, net_2])
+    assert network.num_scaffold_nodes == 14
+    assert network.num_molecule_nodes == 4