Fix OAuth authorization page and add a spec for it

spec/controllers/oauth/authorizations_controller_spec.rb

@@ -0,0 +1,25 @@
+require 'rails_helper'
+
+RSpec.describe Oauth::AuthorizationsController, type: :controller do
+  render_views
+
+  let(:app) { Doorkeeper::Application.create!(name: 'test', redirect_uri: 'http://localhost/') }
+
+  before do
+    sign_in Fabricate(:user), scope: :user
+  end
+
+  describe 'GET #new' do
+    before do
+      get :new, params: { client_id: app.uid, response_type: 'code', redirect_uri: 'http://localhost/' }
+    end
+
+    it 'returns http success' do
+      expect(response).to have_http_status(:success)
+    end
+
+    it 'gives options to authorize and deny' do
+      expect(response.body).to match(/Authorize/)
+    end
+  end
+end