[Checkins] SVN: zope.app.container/branches/3.5/src/zope/app/container/tests/test_btree.py Added a test for IContainer implementation

[Christophe Combelles]

Log message for revision 87429:
  Added a test for IContainer implementation
  

Changed:
  U   zope.app.container/branches/3.5/src/zope/app/container/tests/test_btree.py

-=-
Modified: zope.app.container/branches/3.5/src/zope/app/container/tests/test_btree.py
===================================================================
--- zope.app.container/branches/3.5/src/zope/app/container/tests/test_btree.py	2008-06-16 16:50:30 UTC (rev 87428)
+++ zope.app.container/branches/3.5/src/zope/app/container/tests/test_btree.py	2008-06-16 16:58:53 UTC (rev 87429)
@@ -16,10 +16,12 @@
 $Id$
 """
 from unittest import TestCase, main, makeSuite, TestSuite
+from zope.interface.verify import verifyObject
 from zope.testing.doctestunit import DocTestSuite
 from zope.app.testing import placelesssetup
 from test_icontainer import TestSampleContainer
 from zope.app.container.btree import BTreeContainer
+from zope.app.container.interfaces import IContainer
 
 class TestBTreeContainer(TestSampleContainer, TestCase):
 
@@ -40,6 +42,14 @@
         self.assertEqual(len(bc), 1)
         self.assertEqual(bc.__dict__['_BTreeContainer__len'](), 1)
 
+    def testContainerInterface(self):
+        bc = BTreeContainer()
+        self.assert_(verifyObject(IContainer, bc))
+        self.checkIterable(bc.items())
+        self.checkIterable(bc.keys())
+        self.checkIterable(bc.values())
+
+
     def testCorrectLengthWhenAddingExistingItem(self):
         """
         for bug #175388
@@ -51,7 +61,20 @@
         self.assertEqual(len(bc), 1)
         self.assertEqual(list(bc), [u'x'])
 
+    def checkIterable(self, iterable):
+        it = iter(iterable)
+        self.assert_(callable(it.next))
+        self.assert_(callable(it.__iter__))
+        self.assert_(iter(it) is it)
+        # Exhaust the iterator:
+        first_time = list(it)
+        self.assertRaises(StopIteration, it.next)
+        # Subsequent iterations will return the same values:
+        self.assertEqual(list(iterable), first_time)
+        self.assertEqual(list(iterable), first_time)
 
+
+
 def test_suite():
     return TestSuite((
         makeSuite(TestBTreeContainer),