Move write_note into SlashCommandsHelper and update other dependent specs

spec/features/issues/user_uses_slash_commands_spec.rb

 require 'rails_helper'
 
 feature 'Issues > User uses slash commands', feature: true, js: true do
+  include SlashCommandsHelpers
   include WaitForAjax
 
   it_behaves_like 'issuable record that supports slash commands in its description and notes', :issue do
@@ -17,14 +18,15 @@ feature 'Issues > User uses slash commands', feature: true, js: true do
       visit namespace_project_issue_path(project.namespace, project, issue)
     end
 
+    after do
+      wait_for_ajax
+    end
+
     describe 'adding a due date from note' do
       let(:issue) { create(:issue, project: project) }
 
       it 'does not create a note, and sets the due date accordingly' do
-        page.within('.js-main-target-form') do
-          fill_in 'note[note]', with: "/due 2016-08-28"
-          click_button 'Comment'
-        end
+        write_note("/due 2016-08-28")
 
         expect(page).not_to have_content '/due 2016-08-28'
         expect(page).to have_content 'Your commands have been executed!'
@@ -41,10 +43,7 @@ feature 'Issues > User uses slash commands', feature: true, js: true do
       it 'does not create a note, and removes the due date accordingly' do
         expect(issue.due_date).to eq Date.new(2016, 8, 28)
 
-        page.within('.js-main-target-form') do
-          fill_in 'note[note]', with: "/remove_due_date"
-          click_button 'Comment'
-        end
+        write_note("/remove_due_date")
 
         expect(page).not_to have_content '/remove_due_date'
         expect(page).to have_content 'Your commands have been executed!'

spec/features/merge_requests/user_uses_slash_commands_spec.rb

 require 'rails_helper'
 
 feature 'Merge Requests > User uses slash commands', feature: true, js: true do
+  include SlashCommandsHelpers
   include WaitForAjax
 
   let(:user) { create(:user) }
@@ -20,11 +21,12 @@ feature 'Merge Requests > User uses slash commands', feature: true, js: true do
       visit namespace_project_merge_request_path(project.namespace, project, merge_request)
     end
 
+    after do
+      wait_for_ajax
+    end
+
     it 'does not recognize the command nor create a note' do
-      page.within('.js-main-target-form') do
-        fill_in 'note[note]', with: "/due 2016-08-28"
-        click_button 'Comment'
-      end
+      write_note("/due 2016-08-28")
 
       expect(page).not_to have_content '/due 2016-08-28'
     end

spec/support/issuable_slash_commands_shared_examples.rb

@@ -2,6 +2,7 @@
 # It takes a `issuable_type`, and expect an `issuable`.
 
 shared_examples 'issuable record that supports slash commands in its description and notes' do |issuable_type|
+  include SlashCommandsHelpers
   include WaitForAjax
 
   let(:master) { create(:user) }
@@ -25,15 +26,6 @@ shared_examples 'issuable record that supports slash commands in its description
     wait_for_ajax
   end
 
-  def write_note(text)
-    Sidekiq::Testing.fake! do
-      page.within('.js-main-target-form') do
-        fill_in 'note[note]', with: text
-        click_button 'Comment'
-      end
-    end
-  end
-
   describe "new #{issuable_type}" do
     context 'with commands in the description' do
       it "creates the #{issuable_type} and interpret commands accordingly" do

spec/support/slash_commands_helpers.rb

+module SlashCommandsHelpers
+  def write_note(text)
+    Sidekiq::Testing.fake! do
+      page.within('.js-main-target-form') do
+        fill_in 'note[note]', with: text
+        click_button 'Comment'
+      end
+    end
+  end
+end