cleanup per review comments

Author: dwhswenson

paths_cli/compiling/engines.py

@@ -5,8 +5,7 @@
 from paths_cli.compiling.plugins import EngineCompilerPlugin, CategoryPlugin
 
 def load_openmm_xml(filename):
-    from openpathsampling.integration_tools import HAS_OPENMM
-    from openpathsampling.integration_tools import openmm as mm
+    from paths_cli.compat.openmm import HAS_OPENMM, mm
     if not HAS_OPENMM:  # -no-cov-
         raise RuntimeError("OpenMM does not seem to be installed")
 

paths_cli/tests/compiling/test_tools.py

@@ -17,9 +17,10 @@ def test_custom_eval(expr, expected):
 def test_custom_eval_int():
     assert custom_eval_int('5') == 5
 
-def test_custom_eval_int_strict_pos_error():
+@pytest.mark.parametrize('inp', [0, -1])
+def test_custom_eval_int_strict_pos_error(inp):
     with pytest.raises(InputError):
-        custom_eval_int_strict_pos(-1)
+        custom_eval_int_strict_pos(inp)
 
 def test_mdtraj_parse_atomlist_bad_input():
     with pytest.raises(TypeError, match="not integers"):