Added test case for PR tpaviot#614 - return None is TopoDS_Shape is Null in function transformer

Author: tpaviot

test/core_wrapper_features_unittest.py

@@ -28,7 +28,7 @@
 from OCC.Core.BRepPrimAPI import BRepPrimAPI_MakeBox
 from OCC.Core.BRepBuilderAPI import (BRepBuilderAPI_MakeVertex,
  BRepBuilderAPI_MakeEdge)
-from OCC.Core.gp import (gp_Pnt, gp_Vec, gp_Pnt2d, gp_Lin, gp_Dir,
+from OCC.Core.gp import (gp_Pnt, gp_Vec, gp_Pnt2d, gp_Lin, gp_Dir, gp_Ax2,
  gp_Quaternion, gp_QuaternionSLerp, gp_XYZ, gp_Mat)
 from OCC.Core.GC import GC_MakeSegment
 from OCC.Core.STEPControl import STEPControl_Writer
@@ -52,6 +52,8 @@
  BRepCheck_EmptyWire)
 from OCC.Core.Geom import Geom_Curve, Geom_Line, Geom_BSplineCurve
 from OCC.Core.BRep import BRep_Tool_Curve
+from OCC.Core.HLRBRep import HLRBRep_Algo, HLRBRep_HLRToShape
+from OCC.Core.HLRAlgo import HLRAlgo_Projector
 
 @contextmanager
 def assert_warns_deprecated():
@@ -658,6 +660,20 @@ def test_in_place_operators(self):
  self.assertEqual(d.Y(), 7.)
  self.assertEqual(d.Z(), 9.)
 
+ def test_shape_conversion_as_py_none(self):
+ # see issue #600 and PR #614
+ # a null topods_shape should be returned as Py_None by the TopoDS transformer
+ # the following test case returns a null topods_shape
+ box = BRepPrimAPI_MakeBox(1., 1., 1.).Shape()
+ hlr = HLRBRep_Algo()
+ hlr.Add(box)
+ projector = HLRAlgo_Projector(gp_Ax2(gp_Pnt(), gp_Dir(-1.75, 1.1, 5)))
+ hlr.Projector(projector)
+ hlr.Update()
+ hlr.Hide()
+ hlr_shapes = HLRBRep_HLRToShape(hlr)
+ visible_smooth_edges = hlr_shapes.Rg1LineVCompound()
+ self.assertTrue(visible_smooth_edges is None)
 
 def suite():
  test_suite = unittest.TestSuite()