Add tests for CiStatusHelper and changelog item

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.1.0 (unreleased)
-  - 
+  - Show CI status on all pages where commits list is rendered
 
 v 8.0.1
   - Improve CI migration procedure and documentation

spec/helpers/ci_status_helper_spec.rb

+require 'spec_helper'
+
+describe CiStatusHelper do
+  include IconsHelper
+
+  let(:success_commit) { double("Ci::Commit", status: 'success') }
+  let(:failed_commit) { double("Ci::Commit", status: 'failed') }
+
+  describe 'ci_status_color' do
+    it { expect(ci_status_icon(success_commit)).to include('fa-check') }
+    it { expect(ci_status_icon(failed_commit)).to include('fa-close') }
+  end
+
+  describe 'ci_status_color' do
+    it { expect(ci_status_color(success_commit)).to eq('green') }
+    it { expect(ci_status_color(failed_commit)).to eq('red') }
+  end
+end