Merge branch 'issue_4131' into 'master'

Upgrade Poltergeist to 1.8.1.

Close #4131 

See merge request !2126

Gemfile

@@ -251,7 +251,7 @@ group :development, :test do
 
   gem 'capybara',            '~> 2.4.0'
   gem 'capybara-screenshot', '~> 1.0.0'
-  gem 'poltergeist',         '~> 1.6.0'
+  gem 'poltergeist',         '~> 1.8.1'
 
   gem 'teaspoon', '~> 1.0.0'
   gem 'teaspoon-jasmine', '~> 2.2.0'

Gemfile.lock

@@ -405,7 +405,7 @@ GEM
     method_source (0.8.2)
     mime-types (1.25.1)
     mimemagic (0.3.0)
-    mini_portile (0.6.2)
+    mini_portile2 (2.0.0)
     minitest (5.7.0)
     mousetrap-rails (1.4.6)
     multi_json (1.11.2)
@@ -420,8 +420,8 @@ GEM
       grape
       newrelic_rpm
     newrelic_rpm (3.9.4.245)
-    nokogiri (1.6.6.4)
-      mini_portile (~> 0.6.0)
+    nokogiri (1.6.7)
+      mini_portile2 (~> 2.0.0.rc2)
     nprogress-rails (0.1.6.7)
     oauth (0.4.7)
     oauth2 (1.0.0)
@@ -488,7 +488,7 @@ GEM
     parser (2.2.3.0)
       ast (>= 1.1, < 3.0)
     pg (0.18.4)
-    poltergeist (1.6.0)
+    poltergeist (1.8.1)
       capybara (~> 2.1)
       cliver (~> 0.3.1)
       multi_json (~> 1.0)
@@ -905,7 +905,7 @@ DEPENDENCIES
   org-ruby (~> 0.9.12)
   paranoia (~> 2.0)
   pg (~> 0.18.2)
-  poltergeist (~> 1.6.0)
+  poltergeist (~> 1.8.1)
   pry-rails
   quiet_assets (~> 1.0.2)
   rack-attack (~> 4.3.0)

features/steps/project/forked_merge_requests.rb

@@ -41,7 +41,8 @@ class Spinach::Features::ProjectForkedMergeRequests < Spinach::FeatureSteps
 
     click_button "Compare branches and continue"
 
-    expect(page).to have_content "New Merge Request"
+    expect(page).to have_css("h3.page-title", text: "New Merge Request")
+
     fill_in "merge_request_title", with: "Merge Request On Forked Project"
   end
 

features/steps/shared/diff_note.rb

@@ -166,7 +166,7 @@ module SharedDiffNote
   end
 
   step 'I should see add a diff comment button' do
-    expect(page).to have_css('.js-add-diff-note-button', visible: true)
+    expect(page).to have_css('.js-add-diff-note-button')
   end
 
   step 'I should see an empty diff comment form' do