Add test to verify that creating accounts is case insensitive, and up…

…date the accounts controller

app/controllers/accounts_controller.rb

@@ -26,6 +26,7 @@ def ensure_admin!
   end
 
   def create_user(onyen)
+    onyen = onyen.downcase
     email = "#{onyen}@ad.unc.edu"
     if User.where(uid: onyen).blank?
       user = User.where(uid: onyen).first_or_create(provider: 'shibboleth', email: email)

spec/controllers/accounts_controller_spec.rb

@@ -59,6 +59,12 @@
         expect(response).to redirect_to('/admin/users?locale=en')
         expect(flash[:notice]).to eq "A user account for #{invalid_attributes[:onyen]}@ad.unc.edu already exists."
       end
+
+      it 'catches case differences' do
+        post :create, params: { account: { onyen: 'AdMiN' } }
+        expect(response).to redirect_to('/admin/users?locale=en')
+        expect(flash[:notice]).to eq "A user account for #{invalid_attributes[:onyen]}@ad.unc.edu already exists."
+      end
     end
   end