Adds tests to build view

Fix CHANGELOG entry

app/views/projects/builds/_header.html.haml

@@ -2,7 +2,7 @@
   .header-content
     = render 'ci/status/badge', status: @build.detailed_status(current_user)
     Build
-    %strong ##{@build.id}
+    %strong.js-build-id ##{@build.id}
     in pipeline
     = link_to pipeline_path(@build.pipeline) do
       %strong ##{@build.pipeline.id}

changelogs/unreleased/26947-build-status-self-link.yml

 ---
 title: Add new ci status partial to render a badge without a link
-merge_request:
-author: 8740
+merge_request: 8740
+author:

spec/views/projects/builds/show.html.haml_spec.rb

@@ -15,6 +15,32 @@ describe 'projects/builds/show', :view do
     allow(view).to receive(:can?).and_return(true)
   end
 
+  describe 'build information in header' do
+    let(:build) do
+      create(:ci_build, :success, environment: 'staging')
+    end
+
+    before do
+      render
+    end
+
+    it 'shows status name' do
+      expect(rendered).to have_css('.ci-status.ci-success', text: 'passed')
+    end
+
+    it 'shows build id' do
+      expect(rendered).to have_css('.js-build-id', text: build.id)
+    end
+
+    it 'shows a link to the pipeline' do
+      expect(rendered).to have_link(build.pipeline.id)
+    end
+
+    it 'shows a link to the commit' do
+      expect(rendered).to have_link(build.pipeline.short_sha)
+    end
+  end
+
   describe 'environment info in build view' do
     context 'build with latest deployment' do
       let(:build) do