Surface: add unit test for blend curve

src/Mod/Surface/CMakeLists.txt

@@ -6,6 +6,12 @@ endif(BUILD_GUI)
 
 set(Surface_Scripts
     Init.py
+    TestSurfaceApp.py
+)
+
+set(Surface_TestScripts
+    SurfaceTests/__init__.py
+    SurfaceTests/TestBlendCurve.py
 )
 
 if(BUILD_GUI)
@@ -13,13 +19,14 @@ if(BUILD_GUI)
 endif(BUILD_GUI)
 
 add_custom_target(SurfaceScripts ALL
-    SOURCES ${Surface_Scripts}
+    SOURCES ${Surface_Scripts} ${Surface_TestScripts}
 )
 
 fc_target_copy_resource(SurfaceScripts
     ${CMAKE_CURRENT_SOURCE_DIR}
     ${CMAKE_BINARY_DIR}/Mod/Surface
     ${Surface_Scripts}
+    ${Surface_TestScripts}
 )
 
 install(
@@ -28,3 +35,10 @@ install(
     DESTINATION
         Mod/Surface
 )
+
+install(
+    FILES
+        ${Surface_TestScripts}
+    DESTINATION
+        Mod/Surface/SurfaceTests
+)

src/Mod/Surface/Init.py

@@ -1,2 +1,4 @@
 # FreeCAD init script of the Surface module
 # (c) 2001 Juergen Riegel LGPL
+
+FreeCAD.__unit_test__ += ["TestSurfaceApp"]

src/Mod/Surface/SurfaceTests/TestBlendCurve.py

@@ -0,0 +1,75 @@
+# ***************************************************************************
+# *                                                                         *
+# *   Copyright (c) 2022 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+# *                                                                         *
+# *   This program is free software; you can redistribute it and/or modify  *
+# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
+# *   as published by the Free Software Foundation; either version 2 of     *
+# *   the License, or (at your option) any later version.                   *
+# *   for detail see the LICENCE text file.                                 *
+# *                                                                         *
+# *   This program is distributed in the hope that it will be useful,       *
+# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+# *   GNU Library General Public License for more details.                  *
+# *                                                                         *
+# *   You should have received a copy of the GNU Library General Public     *
+# *   License along with this program; if not, write to the Free Software   *
+# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+# *   USA                                                                   *
+# *                                                                         *
+# ***************************************************************************
+
+__title__ = "Surface unit tests"
+__author__ = "Werner Mayer"
+__url__ = "https://www.freecadweb.org"
+
+import sys
+import unittest
+from os.path import join
+
+import FreeCAD
+from FreeCAD import Base
+import Surface
+
+vec = Base.Vector
+
+
+class TestBlendCurve(unittest.TestCase):
+    def setUp(self):
+        pass
+
+    def tearDown(self):
+        pass
+
+    def assertAlmostCoincide(self, pt1, pt2, places=None, msg=None, delta=None):
+        self.assertAlmostEqual(pt1.x, pt2.x, places, msg, delta)
+        self.assertAlmostEqual(pt1.y, pt2.y, places, msg, delta)
+        self.assertAlmostEqual(pt1.z, pt2.z, places, msg, delta)
+
+    def test_blend_curve(self):
+        # Create C0 BlendPoint at origin
+        b1 = Surface.BlendPoint()
+        # Create G1 BlendPoint
+        b2 = Surface.BlendPoint([vec(10,3,6), vec(2,5,6)])
+        # BlendCurve between the two BlendPoints
+        bc = Surface.BlendCurve(b1, b2)
+        # Compute the interpolating BezierCurve
+        curve1 = bc.compute()
+
+        # Create G2 BlendPoint at the end of previous BlendCurve
+        b1 = Surface.BlendPoint(curve1.toShape(), 1, 2)
+        # Create G1 BlendPoint
+        b2 = Surface.BlendPoint([vec(5,6,2), vec(2,5,6)])
+
+        bc = Surface.BlendCurve(b1, b2)
+        # Compute the interpolating BezierCurve
+        curve2 = bc.compute()
+
+        d1 = curve1.getD2(1)
+        d2 = curve2.getD2(0)
+
+        self.assertEqual(len(d1), len(d2))
+        self.assertAlmostCoincide(d1[0], d2[0])
+        self.assertAlmostCoincide(d1[1], d2[1])
+        self.assertAlmostCoincide(d1[2], d2[2])

src/Mod/Surface/TestSurfaceApp.py

@@ -0,0 +1,24 @@
+# ***************************************************************************
+# *                                                                         *
+# *   Copyright (c) 2022 Werner Mayer <wmayer[at]users.sourceforge.net>     *
+# *                                                                         *
+# *   This program is free software; you can redistribute it and/or modify  *
+# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
+# *   as published by the Free Software Foundation; either version 2 of     *
+# *   the License, or (at your option) any later version.                   *
+# *   for detail see the LICENCE text file.                                 *
+# *                                                                         *
+# *   This program is distributed in the hope that it will be useful,       *
+# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+# *   GNU Library General Public License for more details.                  *
+# *                                                                         *
+# *   You should have received a copy of the GNU Library General Public     *
+# *   License along with this program; if not, write to the Free Software   *
+# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+# *   USA                                                                   *
+# *                                                                         *
+# ***************************************************************************
+
+# Unit test for the Surface module
+from SurfaceTests.TestBlendCurve import TestBlendCurve