From 2ae441ff9daf7b9f44e5ec9f94f767ee7a781275 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sat, 19 Aug 2017 19:36:40 +0200
Subject: [PATCH] unit test for duplicate links in a group

---
 src/Mod/Test/Document.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/Mod/Test/Document.py b/src/Mod/Test/Document.py
index 44b56b86ca..06b9b41a91 100644
--- a/src/Mod/Test/Document.py
+++ b/src/Mod/Test/Document.py
@@ -156,6 +156,13 @@ class DocumentBasicCases(unittest.TestCase):
   def testMem(self):
     self.Doc.MemSize
 
+  def testDuplicateLinks(self):
+    obj = self.Doc.addObject("App::FeatureTest","obj")
+    grp = self.Doc.addObject("App::DocumentObjectGroup","group")
+    grp.Group = [obj,obj]
+    self.Doc.removeObject(obj.Name)
+    self.assertListEqual(grp.Group, [])
+
   def testAddRemove(self):
     L1 = self.Doc.addObject("App::FeatureTest","Label_1")
     # must delete object