Skip xhtml tests when tidy is not installed.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@18640 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/tests/testXHTML.py

@@ -195,7 +195,11 @@ def addTestMethodDynamically():
             method_name = 'test%s%s' % (portal_type, view_name)
             setattr(TestXHTML, method_name, method)
 
-addTestMethodDynamically()
+# tidy may not be installed in livecd. Then we will skip xhtml validation tests.
+if not os.path.exists('/usr/bin/tidy'):
+  print '*** tidy is not installed at /usr/bin/tidy ***'
+else:
+  addTestMethodDynamically()
 
 def test_suite():
   suite = unittest.TestSuite()