Make it more readable and use right API.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@24722 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/tests/testBusinessTemplate.py

@@ -5238,6 +5238,7 @@ class TestBusinessTemplate(ERP5TypeTestCase, LogInterceptor):
     Check that a skin selection has been removed.
     """
     self.failUnless('Foo' not in self.portal.portal_skins._getSelections().keys())
+    self.assertTrue('Foo' in ps.getSkinSelections())
  
 
 def test_suite():