Fix label order by priority on labels page

app/models/label.rb

@@ -33,11 +33,11 @@ class Label < ActiveRecord::Base
   scope :templates, ->  { where(template: true) }
 
   def self.prioritized
-    where.not(priority: nil).reorder(:title)
+    where.not(priority: nil).reorder(:priority, :title)
   end
 
   def self.unprioritized
-    where(priority: nil).reorder(:title)
+    where(priority: nil)
   end
 
   alias_attribute :name, :title

spec/controllers/projects/labels_controller_spec.rb

+require 'spec_helper'
+
+describe Projects::LabelsController do
+  let(:project) { create(:project) }
+  let(:user)    { create(:user) }
+
+  before do
+    project.team << [user, :master]
+    sign_in(user)
+  end
+
+  describe 'GET #index' do
+    def create_label(attributes)
+      create(:label, attributes.merge(project: project))
+    end
+
+    before do
+      15.times { |i| create_label(priority: (i % 3) + 1, title: "label #{15 - i}") }
+      5.times { |i| create_label(title: "label #{100 - i}") }
+
+
+      get :index, namespace_id: project.namespace.to_param, project_id: project.to_param
+    end
+
+    context '@prioritized_labels' do
+      let(:prioritized_labels) { assigns(:prioritized_labels) }
+
+      it 'contains only prioritized labels' do
+        expect(prioritized_labels).to all(have_attributes(priority: a_value > 0))
+      end
+
+      it 'is sorted by priority, then label title' do
+        priorities_and_titles = prioritized_labels.pluck(:priority, :title)
+
+        expect(priorities_and_titles.sort).to eq(priorities_and_titles)
+      end
+    end
+
+    context '@labels' do
+      let(:labels) { assigns(:labels) }
+
+      it 'contains only unprioritized labels' do
+        expect(labels).to all(have_attributes(priority: nil))
+      end
+
+      it 'is sorted by label title' do
+        titles = labels.pluck(:title)
+
+        expect(titles.sort).to eq(titles)
+      end
+    end
+  end
+end

spec/features/projects/labels/update_prioritization_spec.rb

@@ -55,7 +55,7 @@ feature 'Prioritize labels', feature: true do
       end
     end
 
-    scenario 'user can sort prioritized labels', js: true do
+    scenario 'user can sort prioritized labels and persist across reloads', js: true do
       bug     = create(:label, title: 'bug', priority: 1)
       wontfix = create(:label, title: 'wontfix', priority: 2)
 
@@ -75,6 +75,13 @@ feature 'Prioritize labels', feature: true do
         expect(first('li')).to have_content('wontfix')
         expect(page.all('li').last).to have_content('bug')
       end
+
+      visit current_url
+
+      page.within('.prioritized-labels') do
+        expect(first('li')).to have_content('wontfix')
+        expect(page.all('li').last).to have_content('bug')
+      end
     end
   end