code: def begin(self):
          
          self.url = self.server.wiki.create(self)
          if not self.testmode:
              self.commit.create_status("pending", self.url, "Running unit tests...")
docs: Sets the status message on the *last* commit for this pull request
          to be 'pending' with a details link to a newly created Wiki page with
          the setup of the unit tests being run. Does *not* run the actual unit
          tests yet.