Tag creator can't delete own powertags -- needs test written

[jywarren]

Katie made a tag activity:coqui on this page: https://publiclab.org/notes/donblair/01-14-2015/riffle-coqui-development-plan

but couldn't delete it herself. she's not a mod or admin. So I it looks like the permission check is OK:

https://github.com/publiclab/plots2/blob/master/app/controllers/tag_controller.rb#L148

if node_tag.uid == current_user.uid || current_user.role == "admin" || current_user.role == "moderator"

But we don't test this out, so we should add a test here: https://github.com/publiclab/plots2/blob/master/test/functional/tag_controller_test.rb

This could be a good starting draft:

test "should allow deletion if you created tag" do
  UserSession.create(rusers(:bob))
  node(:blog).add_tag('super', rusers(:bob))
  tag = DrupalNodeCommunityTag.last

  get :delete, tid: tag.tid, uid: tag.uid

  assert_redirected_to node(:blog).path
  # assert node not deleted! 
end

[jywarren]

I believe this is fixed in #917!