Show information indicating that build has been erased

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

@@ -76,10 +76,15 @@
         = link_to '#down-build-trace', class: 'btn' do
           %i.fa.fa-angle-down
 
+      - unless @build.erased?
         %pre.trace#build-trace
           %code.bash
             = preserve do
               = raw @build.trace_html
+      - else
+        .erased.alert.alert-warning
+          Build has been erased by #{@build.erased_by.username} #{time_ago_with_tooltip(@build.created_at)}
+
       %div#down-build-trace
 
     .col-md-3

features/project/builds/summary.feature

@@ -20,3 +20,4 @@ Feature: Project Builds Summary
     And I click erase build button
     Then recent build has been erased
     And recent build summary does not have artifacts widget
+    And recent build summary contains information saying that build has been erased

features/steps/project/builds/summary.rb

@@ -24,4 +24,8 @@ class Spinach::Features::ProjectBuildsSummary < Spinach::FeatureSteps
   step 'recent build summary does not have artifacts widget' do
     expect(page).to have_no_css('.artifacts')
   end
+
+  step 'recent build summary contains information saying that build has been erased' do
+    expect(page).to have_css('.erased')
+  end
 end