Add feature specs for list of badges page

spec/features/projects/badges/list_spec.rb

+require 'spec_helper'
+
+feature 'list of badges' do
+  include Select2Helper
+
+  background do
+    user = create(:user)
+    project = create(:project)
+    project.team << [user, :master]
+    login_as(user)
+    visit edit_namespace_project_path(project.namespace, project)
+  end
+
+  scenario 'user displays list of badges' do
+    click_link 'Badges'
+
+    expect(page).to have_content 'build status'
+    expect(page).to have_content 'Markdown'
+    expect(page).to have_content 'HTML'
+    expect(page).to have_css('.highlight', count: 2)
+    expect(page).to have_xpath("//img[@alt='build status']")
+
+    page.within('.highlight', match: :first) do
+      expect(page).to have_content 'badges/master/build.svg'
+    end
+  end
+
+  scenario 'user changes current ref on badges list page', js: true do
+    click_link 'Badges'
+    select2('improve/awesome', from: '#ref')
+
+    expect(page).to have_content 'badges/improve/awesome/build.svg'
+  end
+end