Add spinach test for note polling

This also increases capybara timeout to 15 seconds (note polling
interval). Capybara will look for new note for this period of time.

features/project/issues/issues.feature

@@ -197,3 +197,9 @@ Feature: Project Issues
     And I should not see labels field
     And I submit new issue "500 error on profile"
     Then I should see issue "500 error on profile"
+
+  @javascript
+  Scenario: Another user adds a comment to issue I'm currently viewing
+    Given I visit issue page "Release 0.4"
+    And another user adds a comment with text "Yay!" to issue "Release 0.4"
+    Then I should see a new comment with text "Yay!"

features/steps/project/issues/issues.rb

@@ -284,6 +284,16 @@ class Spinach::Features::ProjectIssues < Spinach::FeatureSteps
     end
   end
+  step 'another user adds a comment with text "Yay!" to issue "Release 0.4"' do
+    issue = Issue.find_by!(title: 'Release 0.4')
+    create(:note_on_issue, noteable: issue,  note: 'Yay!')
+  end
+
+  step 'I should see a new comment with text "Yay!"' do
+    page.within '#notes' do
+      expect(page).to have_content('Yay!')
+    end
+  end
   def filter_issue(text)
     fill_in 'issue_search', with: text
   end

features/support/capybara.rb

@@ -2,7 +2,7 @@ require 'spinach/capybara'
 require 'capybara/poltergeist'
 # Give CI some extra time
-timeout = (ENV['CI'] || ENV['CI_SERVER']) ? 90 : 10
+timeout = (ENV['CI'] || ENV['CI_SERVER']) ? 90 : 15
 Capybara.javascript_driver = :poltergeist
 Capybara.register_driver :poltergeist do |app|