From a7fb172f8f1d62ad46795df60d9327e890e86f4c Mon Sep 17 00:00:00 2001
From: mike <michael.jmontcalm@gmail.com>
Date: Wed, 25 Mar 2009 19:20:30 +0000
Subject: TutoriusV2 : Added interface validation for Actions

---
(limited to 'src/sugar/tutorius/tests/actiontests.py')

diff --git a/src/sugar/tutorius/tests/actiontests.py b/src/sugar/tutorius/tests/actiontests.py
index ab9cdba..8eb7a89 100644
--- a/src/sugar/tutorius/tests/actiontests.py
+++ b/src/sugar/tutorius/tests/actiontests.py
@@ -38,7 +38,15 @@ class PropertyAction(Action):
         return self._a
     
     a = property(fget=get_a, fset=set_a)
-    
+
+def has_function(obj, function_name):
+        """
+        Checks whether the object has a function by that name.
+        """
+        if hasattr(obj, function_name) and hasattr(obj.__getattribute__(function_name), "__call__"):
+            return True
+        return False
+
 class PropsTest(unittest.TestCase):
     
     def test_get_properties(self):
@@ -46,8 +54,33 @@ class PropsTest(unittest.TestCase):
         
         assert prop.get_properties() == ['a'], "Action does not contain property 'a'"
     
+    def validate_wrapper(self, wrapper_instance):
+        """
+        Ensures that a given instance of a wrapper implements the Action
+        interface.
+        """
+        assert has_function(wrapper_instance, "do"),\
+            "The wrapper does not have the 'do' function"
+            
+        assert has_function(wrapper_instance, "undo"),\
+            "The wrapper does not have the 'undo' function."
+            
+        assert has_function(wrapper_instance, "get_properties"),\
+            "The wrapper does not have the 'get_properties' function."
+        
+    def test_once_wrapper(self):
+        """
+        Tests that the interface of the OnceWrapper actually conforms to the of
+        the Action.
+        """
+        prop = PropertyAction(7)
+        
+        onceWrap = OnceWrapper(prop)
+        
+        self.validate_wrapper(onceWrap)
+    
 class CountAction(Action):
-    """
+	"""
     This action counts how many times it's do and undo methods get called
     """
     def __init__(self):
--
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