Merge branch 'master' into typing-abstraction

system/tests/test_utils.py

@@ -7,8 +7,20 @@
 
 u = pint.UnitRegistry()
 
-
-def test_simtk_to_pint():
+simtk_quantitites = [
+    4.0 * simtk_unit.nanometer,
+    5.0 * simtk_unit.angstrom,
+]
+
+pint_quantities = [
+    4.0 * u.nanometer,
+    5.0 * u.angstrom,
+]
+@pytest.mark.parametrize(
+    'simtk_quantity,pint_quantity',
+    [(s, p) for s, p in zip(simtk_quantitites, pint_quantities)]
+)
+def test_simtk_to_pint(simtk_quantity, pint_quantity):
     """Test conversion from SimTK Quantity to pint Quantity."""
     converted_pint_quantity = simtk_to_pint(simtk_quantity)