Persistence: Test cases for content dump

It turned our that the document could not be dumped as the xml specifier was used as first element. As the dumping added the <content> element around it was invalid. However, content is required to read properties. Hence the xml element generation was moved.

src/Mod/Test/Document.py

@@ -454,7 +454,33 @@ class DocumentSaveRestoreCases(unittest.TestCase):
       self.failUnless(hasattr(Doc.Extension_2.ViewObject.ExtensionProxy, 'testFunction'))
 
     FreeCAD.closeDocument("SaveRestoreExtensions")
-
+    
+  def testPersistenceContentDump(self):
+       
+    #test smallest level... property
+    self.Doc.Label_1.Vector = (1,2,3)
+    dump = self.Doc.Label_1.dumpPropertyContent('Vector', Compression = 9)
+    self.Doc.Label_2.restorePropertyContent('Vector', dump)
+    self.failUnless(self.Doc.Label_1.Vector == self.Doc.Label_2.Vector)
+    
+    #next higher: object
+    self.Doc.Label_1.Distance = 12
+    self.Doc.Label_1.String = 'test'
+    dump = self.Doc.Label_1.dumpContent()
+    self.Doc.Label_3.restoreContent(dump)
+    self.failUnless( self.Doc.Label_1.Distance == self.Doc.Label_3.Distance)   
+    self.failUnless( self.Doc.Label_1.String == self.Doc.Label_3.String)
+    
+    #highest level: document
+    dump = self.Doc.dumpContent(9)
+    Doc = FreeCAD.newDocument("DumpTest")
+    Doc.restoreContent(dump)
+    self.failUnless(len(self.Doc.Objects) == len(Doc.Objects))
+    self.failUnless( self.Doc.Label_1.Distance == Doc.Label_1.Distance)   
+    self.failUnless( self.Doc.Label_1.String == Doc.Label_1.String)
+    self.failUnless(self.Doc.Label_1.Vector == Doc.Label_1.Vector)
+    FreeCAD.closeDocument("DumpTest")   
+    
   def tearDown(self):
     #closing doc
     FreeCAD.closeDocument("SaveRestoreTests")