Tests for release status heading on MR#show

app/views/projects/merge_requests/widget/_heading.html.haml

@@ -15,8 +15,8 @@
           = link_to "View details", builds_namespace_project_merge_request_path(@project.namespace, @project, @merge_request), class: "js-show-tab", data: {action: 'builds'}
 
 - elsif @merge_request.has_ci?
-  // Compatibility with old CI integrations (ex jenkins) when you request status from CI server via AJAX
-  // Remove in later versions when services like Jenkins will set CI status via Commit status API
+  - # Compatibility with old CI integrations (ex jenkins) when you request status from CI server via AJAX
+  - # Remove in later versions when services like Jenkins will set CI status via Commit status API
   .mr-widget-heading
     - %w[success skipped canceled failed running pending].each do |status|
       .ci_widget{class: "ci-#{status}", style: "display:none"}

spec/views/projects/merge_requests/_heading.html.haml_spec.rb

@@ -0,0 +1,23 @@
+require 'spec_helper'
+
+describe 'projects/merge_requests/widget/_heading' do
+  include Devise::TestHelpers
+
+  context 'when released to an environment' do
+    let(:project)       { merge_request.target_project }
+    let(:merge_request) { create(:merge_request, :merged) }
+    let(:environment)   { create(:environment, project: project) }
+    let!(:deployment)   { create(:deployment, environment: environment,
+                                    sha: 'a5391128b0ef5d21df5dd23d98557f4ef12fae20') }
+
+    before do
+      assign(:merge_request, merge_request)
+
+      render
+    end
+
+    it 'displays that the environment is deployed' do
+      expect(rendered).to match('Released to')
+    end
+  end
+end