Minor changes in the test system; XmlUnmarshaller can unmarshall XML content from a string, file handler of file path; any Appy object now has a method 'getField(name)' that returns a given field (=Appy type); bugfix while counting number of tests found in a gen-application.

gen/plone25/wrappers/__init__.py

@@ -94,6 +94,8 @@ class AbstractWrapper:
     def get_fields(self): return self.o.getAllAppyTypes()
     fields = property(get_fields)
 
+    def getField(self, name): return self.o.getAppyType(name)
+
     def link(self, fieldName, obj):
         '''This method links p_obj (which can be a list of objects) to this one
            through reference field p_fieldName.'''