Fix code unfold not working on Compare commits page

Closes #1274

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 7.10.0 (unreleased)
+  - Fix code unfold not working on Compare commits page (Stan Hu)
   - Include missing events and fix save functionality in admin service template settings form (Stan Hu)
   - Fix "Import projects from" button to show the correct instructions (Stan Hu)
   - Fix dots in Wiki slugs causing errors (Stan Hu)

app/assets/javascripts/dispatcher.js.coffee

@@ -28,6 +28,8 @@ class Dispatcher
         new Milestone()
       when 'projects:milestones:new', 'projects:milestones:edit'
         new ZenMode()
+      when 'projects:compare:show'
+        new Diff()
       when 'projects:issues:new','projects:issues:edit'
         GitLab.GfmAutoComplete.setup()
         shortcut_handler = new ShortcutsNavigation()
@@ -115,6 +117,8 @@ class Dispatcher
         new Project()
         new ProjectAvatar()
         switch path[1]
+          when 'compare'
+            shortcut_handler = new ShortcutsNavigation()
           when 'edit'
             shortcut_handler = new ShortcutsNavigation()
             new ProjectNew()

features/project/commits/commits.feature

@@ -21,10 +21,13 @@ Feature: Project Commits
     And I click side-by-side diff button
     Then I see inline diff button
 
+  @javascript
   Scenario: I compare refs
     Given I visit compare refs page
     And I fill compare fields with refs
     Then I see compared refs
+    And I unfold diff
+    Then I should see additional file lines
 
   Scenario: I browse commits for a specific path
     Given I visit my project's commits page for a specific path

features/steps/project/commits/commits.rb

@@ -38,6 +38,18 @@ class Spinach::Features::ProjectCommits < Spinach::FeatureSteps
     click_button "Compare"
   end
 
+  step 'I unfold diff' do
+    @diff = first('.js-unfold')
+    @diff.click
+    sleep 2
+  end
+
+  step 'I should see additional file lines' do
+    within @diff.parent do
+      first('.new_line').text.should_not have_content "..."
+    end
+  end
+
   step 'I see compared refs' do
     page.should have_content "Compare View"
     page.should have_content "Commits (1)"