testXHTML: use self.publish to get HTML source

This is more realistic, because a real HTTP request will use
ZPublisher.BaseRequest.BaseRequest.traverse, which has slightly
different behaviour than getting the form on the context of document.

The behavior becomes different for documents which do some logic on
traversal (like for example the web sites changing the skin).

product/ERP5/tests/testXHTML.py

@@ -27,6 +27,7 @@
 #
 ##############################################################################
 
+import cgi
 import unittest
 import os
 import requests
@@ -34,6 +35,7 @@ from requests.adapters import HTTPAdapter
 from requests.packages.urllib3.util.retry import Retry
 
 from subprocess import Popen, PIPE
+from AccessControl import getSecurityManager
 from Testing import ZopeTestCase
 from Products.ERP5Type.tests.ERP5TypeTestCase import ERP5TypeTestCase
 from Products.ERP5Type.tests.utils import addUserToDeveloperRole, findContentChain
@@ -674,9 +676,20 @@ def makeTestMethod(validator, portal_type, view_name, bt_name):
         self.portal,
         portal_type)
     document = createSubContent(module, portal_type_list)
-    view = getattr(document, view_name)
+
+    response = self.publish(
+        '%s/%s' % (document.getPath(), view_name),
+        user=str(getSecurityManager().getUser()),
+        handle_errors=False,
+    )
+    charset = 'iso8859-15'
+    content_type = response.getHeader('content-type')
+    if content_type:
+      _, params = cgi.parse_header(content_type)
+      charset = params.get('charset', charset)
+
     self.assert_(*validate_xhtml( validator=validator,
-                                  source=view(),
+                                  source=response.getBody().decode(charset),
                                   view_name=view_name,
                                   bt_name=bt_name))
   return testMethod
@@ -757,6 +770,8 @@ def test_suite():
           # One way to fix this would be to allow a custom "init script" to be called
           # on a portal type.
           'test_erp5_simulation_Solver_Decision_SolverDecision_viewConfiguration',
+          # this view redirects to an external URL
+          'test_erp5_web_Static_Web_Site_WebSite_view',
       ))
   suite = unittest.TestSuite()
   suite.addTest(unittest.makeSuite(TestXHTML))