Add tests

Author: adam-urbanczyk

tests/test_exporters.py

@@ -9,6 +9,8 @@
 from cadquery import *
 from cadquery import exporters, importers
 from tests import BaseTest
+from OCP.GeomConvert import GeomConvert
+from OCP.BRepBuilderAPI import BRepBuilderAPI_MakeEdge
 
 
 class TestExporters(BaseTest):
@@ -168,6 +170,26 @@ def testDXF(self):
         self.assertAlmostEqual(s4.val().Area(), s4_i.val().Area(), 6)
         self.assertAlmostEqual(s4.edges().size(), s4_i.edges().size())
 
+        # test periodic spline
+        w = cq.Workplane().spline([(1, 1), (2, 2), (3, 2), (4, 1)], periodic=True)
+        exporters.dxf.exportDXF(w, "res4.dxf")
+
+        w_i = importers.importDXF("res4.dxf")
+
+        self.assertAlmostEqual(w.val().Length(), w_i.val().Length(), 6)
+
+        # test rational spline
+        c = Edge.makeCircle(1)
+        adaptor = c._geomAdaptor()
+        curve = GeomConvert.CurveToBSplineCurve_s(adaptor.Curve().Curve())
+
+        e = Workplane().add(Edge(BRepBuilderAPI_MakeEdge(curve).Shape()))
+        exporters.dxf.exportDXF(w, "res5.dxf")
+
+        e_i = importers.importDXF("res5.dxf")
+
+        self.assertAlmostEqual(e.val().Length(), e_i.val().Length(), 6)
+
     def testTypeHandling(self):
 
         with self.assertRaises(ValueError):