Add tests for Active Tab

app/views/projects/pages/_disabled.html.haml

 .panel.panel-default
   .nothing-here-block
-    GitLab Pages is disabled.
+    GitLab Pages are disabled.
     Ask your system's administrator to enable it.

features/project/active_tab.feature

@@ -53,6 +53,13 @@ Feature: Project Active Tab
     And no other sub navs should be active
     And the active main tab should be Settings
+  Scenario: On Project Settings/Pages
+    Given I visit my project's settings page
+    And I click the "Pages" tab
+    Then the active sub nav should be Pages
+    And no other sub navs should be active
+    And the active main tab should be Settings
+
   Scenario: On Project Members
     Given I visit my project's members page
     Then the active sub nav should be Members

features/steps/project/active_tab.rb

@@ -35,6 +35,10 @@ class Spinach::Features::ProjectActiveTab < Spinach::FeatureSteps
     click_link('Deploy Keys')
   end
+  step 'I click the "Pages" tab' do
+    click_link('Pages')
+  end
+
   step 'the active sub nav should be Members' do
     ensure_active_sub_nav('Members')
   end
@@ -47,6 +51,10 @@ class Spinach::Features::ProjectActiveTab < Spinach::FeatureSteps
     ensure_active_sub_nav('Deploy Keys')
   end
+  step 'the active sub nav should be Pages' do
+    ensure_active_sub_nav('Pages')
+  end
+
   # Sub Tabs: Commits
   step 'I click the "Compare" tab' do