[Zope-CVS] SVN: zversioning/trunk/src/versioning/tests/ Reference example works now.

[Uwe Oestermeier]

Log message for revision 27901:
  Reference example works now.


Changed:
  U   zversioning/trunk/src/versioning/tests/README.txt
  U   zversioning/trunk/src/versioning/tests/repository_setup.py


-=-
Modified: zversioning/trunk/src/versioning/tests/README.txt
===================================================================
--- zversioning/trunk/src/versioning/tests/README.txt	2004-10-10 13:20:00 UTC (rev 27900)
+++ zversioning/trunk/src/versioning/tests/README.txt	2004-10-10 13:20:22 UTC (rev 27901)
@@ -46,10 +46,10 @@
 In order to show some limitations of the current implementation we use a
 prebuild version control repository :
 
-  >>> from versioning.tests.repository_setup import buildOldStyleRepository, buildDatabaseRoot
+  >>> from versioning.tests.repository_setup import buildRepository, buildDatabaseRoot
   >>> db_root = buildDatabaseRoot()
   >>> db_root["sample"] = sample 
-  >>> repository = buildOldStyleRepository()
+  >>> repository = buildRepository()
   
 The current policy forces us to remove __parent__ and __name__. We'll do that
 by specializing the standard adapter that removes nothing:
@@ -91,12 +91,42 @@
   >>> new_c.refers_to == new_a
   False
   
+This demonstrates that the reference to a is not correctly preserved. To
+achieve this goal we overwrite some methods :
 
+  >>> class RefertialVersionControl(Repository) : 
+  ...   # an implementation that preprocesses the object states
+  ...
+  ...   def applyVersionControl(self, object, message) :
+  ...       obj = self.preprocess(object)
+  ...       super(RefertialVersionControl, self).applyVersionControl(obj, message)
+  ...
+  ...   def getVersionOfResource(self, history_id, branch) :
+  ...       obj = super(RefertialVersionControl, self).getVersionOfResource(history_id, branch)
+  ...       return self.postprocess(obj)
+  ...
+  ...   def preprocess(self, obj) :
+  ...       # We replace python references by unique ids
+  ...       
+  
+  >>> repository2 = buildRepository(RefertialVersionControl)
+  >>> repository2.applyVersionControl(sample)
+  >>> repository2.applyVersionControl(a)
+  >>> repository2.applyVersionControl(b)
+  >>> repository2.applyVersionControl(c)
+  
+  
 
+  >>> new_a = accessVersion(repository2, a)
+  >>> new_c = accessVersion(repository2, c)
+  >>> new_c.refers_to == new_a
+  True
+  
 
 
 
 
+
 Extensions: We want to define a repository that works as a black box and returns
 only a ticket which guarantees that we get a valid copy back if we use this ticket.
 

Modified: zversioning/trunk/src/versioning/tests/repository_setup.py
===================================================================
--- zversioning/trunk/src/versioning/tests/repository_setup.py	2004-10-10 13:20:00 UTC (rev 27900)
+++ zversioning/trunk/src/versioning/tests/repository_setup.py	2004-10-10 13:20:22 UTC (rev 27901)
@@ -57,7 +57,7 @@
     connection = db.open()
     return connection.root()
 
-def buildOldStyleRepository():
+def buildRepository(factory=zope.app.versioncontrol.repository.Repository):
     """Setup a zope.app.versioncontrol repository
     
     Placing an object under version control requires an instance of an
@@ -70,7 +70,7 @@
     import zope.app.versioncontrol.repository
     import zope.interface.verify
     
-    repository = zope.app.versioncontrol.repository.Repository()
+    repository = factory()
     assert zope.interface.verify.verifyObject(
                interfaces.IVersionControl,
                repository)