ERP5TypeTestCase: stop copying ZopeTestCase's publish implementation

Call the original method instead of copy/pasting the code

We still keep the following patches:
 - user: this is an ERP5 addition and maybe we use it in customer project
   code (if we don't I'm in favor of removing the feature, it's used in
   only one place in this repo)
 - call `self.changeSkin(self.portal.getCurrentSkinName())`. Maybe this
   is needed for CMFCore tests and could be good to send upstream, I did
   not check this part

product/ERP5Type/tests/ERP5TypeTestCase.py

@@ -29,6 +29,7 @@ from glob import glob
 from hashlib import md5
 from warnings import warn
 from DateTime import DateTime
+import mock
 import Products.ZMySQLDA.DA
 from Products.ZMySQLDA.DA import Connection as ZMySQLDA_Connection
 
@@ -58,7 +59,7 @@ from zope.site.hooks import setSite
 
 from Testing import ZopeTestCase
 from Testing.makerequest import makerequest
-from Testing.ZopeTestCase import PortalTestCase, user_name, ZopeLite
+from Testing.ZopeTestCase import PortalTestCase, user_name, ZopeLite, functional
 from Products.ERP5Type.Core.Workflow import ValidationFailed
 from Products.PythonScripts.PythonScript import PythonScript
 from Products.ERP5Type.Accessor.Constant import PropertyGetter as ConstantGetter
@@ -103,6 +104,15 @@ from Products.ZSQLCatalog.SQLCatalog import Query
 
 from Acquisition import aq_base
 
+if six.PY2:
+  from contextlib import contextmanager
+  @contextmanager
+  def nullcontext(enter_result=None):
+      yield enter_result
+else:
+  from contextlib import nullcontext
+
+
 portal_name = 'erp5_portal'
 
 # we keep a reference to all sites for which setup failed the first time, to
@@ -218,7 +228,7 @@ def _parse_args(self, *args, **kw):
 _parse_args._original = DateTime._original_parse_args
 DateTime._parse_args = _parse_args
 
-class ERP5TypeTestCaseMixin(ProcessingNodeTestCase, PortalTestCase):
+class ERP5TypeTestCaseMixin(ProcessingNodeTestCase, PortalTestCase, functional.Functional):
     """Mixin class for ERP5 based tests.
     """
     def __init__(self, *args, **kw):
@@ -749,116 +759,46 @@ class ERP5TypeTestCaseMixin(ProcessingNodeTestCase, PortalTestCase):
       ZopeTestCase._print('\n%s ' % message)
       LOG('Testing ... ', DEBUG, message)
 
-    def publish(self, path, basic=None, env=None, extra=None, user=None,
-                request_method='GET', stdin=None, handle_errors=True):
-        '''Publishes the object at 'path' returning a response object.'''
-
-        from ZPublisher.HTTPResponse import WSGIResponse
-        from ZPublisher.WSGIPublisher import publish_module
-        from ZPublisher.httpexceptions import HTTPExceptionHandler
-        from Testing.ZopeTestCase.functional import ResponseWrapper
-
-        from AccessControl.SecurityManagement import getSecurityManager
-        from AccessControl.SecurityManagement import setSecurityManager
-
-        # Save current security manager
-        sm = getSecurityManager()
-
-        # Commit the sandbox for good measure
-        self.commit()
-
-        if env is None:
-            env = {}
-
-        request = self.app.REQUEST
-
-        env['SERVER_NAME'] = request['SERVER_NAME']
-        env['SERVER_PORT'] = request['SERVER_PORT']
-        env['HTTP_ACCEPT_CHARSET'] = request['HTTP_ACCEPT_CHARSET']
-        env['SERVER_PROTOCOL'] = 'HTTP/1.1'
-        env['REQUEST_METHOD'] = request_method
-
-        query = ''
-        if '?' in path:
-            path, query = path.split("?", 1)
-        if six.PY2:
-            env['PATH_INFO'] = unquote_to_bytes(path)
-        else:
-            env['PATH_INFO'] = unquote_to_bytes(path).decode('latin-1')
-        env['QUERY_STRING'] = query
-
-        if basic:
-          assert not user, (basic, user)
-          env['HTTP_AUTHORIZATION'] = "Basic %s" % \
-            base64.encodestring(basic).replace('\n', '')
-        elif user:
-          PAS = self.portal.acl_users.__class__
-          orig_extractUserIds = PAS._extractUserIds
-          from thread import get_ident
-          me = get_ident()
-          def _extractUserIds(pas, request, plugins):
-            if me == get_ident():
-              info = pas._verifyUser(plugins, user)
-              return [(info['id'], info['login'])] if info else ()
-            return orig_extractUserIds(pas, request, plugins)
-
-        if stdin is None:
-            stdin = BytesIO()
-
-        outstream = BytesIO()
-        response = WSGIResponse(stdout=outstream, stderr=sys.stderr)
-
-        try:
-          if user:
-            PAS._extractUserIds = _extractUserIds
-
-          # The following `HTTPRequest` object would be created anyway inside
-          # `publish_module_standard` if no `request` argument was given.
-          request = request.__class__(stdin, env, response)
-          # However, we need to inject the content of `extra` inside the
-          # request.
-          if extra:
-            for k, v in six.iteritems(extra): request[k] = v
-
-          wsgi_headers = BytesIO()
-
-          def start_response(status, headers):
-              # Keep the fake response in-sync with the actual values
-              # from the WSGI start_response call.
-              response.setStatus(status.split()[0])
-              for key, value in headers:
-                  response.setHeader(key, value)
-
-              wsgi_headers.write(
-                  b'HTTP/1.1 ' + status.encode('ascii') + b'\r\n')
-              headers = b'\r\n'.join([
-                  (k + ': ' + v).encode('ascii') for k, v in headers])
-              wsgi_headers.write(headers)
-              wsgi_headers.write(b'\r\n\r\n')
-
-          publish = partial(publish_module, _request=request, _response=response)
-          if handle_errors:
-              publish = HTTPExceptionHandler(publish)
-
-          wsgi_result = publish(env, start_response)
-
-
-        finally:
-          if user:
-            PAS._extractUserIds = orig_extractUserIds
-          # Restore security manager
-          setSecurityManager(sm)
-          # Restore site removed by closing of request
-          setSite(self.portal)
+    def publish(self, path, basic=None, env=None, extra=None,
+                request_method='GET', stdin=None, handle_errors=True,
+                user=None):
+      '''Publishes the object at 'path' returning a response object.
 
+      This is from Testing.ZopeTestCase.Functional, extended to support passing
+      a user id directly.
+      '''
+      if user:
+        assert not basic
+        from six.moves._thread import get_ident
+        me = get_ident()
+        def _extractUserIds(pas, request, plugins):
+          if me == get_ident():
+            info = pas._verifyUser(plugins, user)
+            return [(info['id'], info['login'])] if info else ()
+          return mock.DEFAULT
+        user_context = mock.patch(
+          'Products.PluggableAuthService.PluggableAuthService.PluggableAuthService._extractUserIds',
+          side_effect=_extractUserIds,
+          autospec=True)
+      else:
+         user_context = nullcontext()
 
+      try:
+        with user_context:
+          return super(ERP5TypeTestCaseMixin, self).publish(
+            path,
+            basic=basic,
+            env=env,
+            extra=extra,
+            request_method=request_method,
+            stdin=stdin,
+            handle_errors=handle_errors,
+          )
+      finally:
         # Make sure that the skin cache does not have objects that were
         # loaded with the connection used by the requested url.
         self.changeSkin(self.portal.getCurrentSkinName())
 
-        return ResponseWrapper(response, outstream, path,
-                               wsgi_result, wsgi_headers)
-
     def getConsistencyMessageList(self, obj):
         return sorted([ str(message.getMessage())
                         for message in obj.checkConsistency() ])