Merge branch 'remove-duplicate-delete-btn' into 'master'

Remove duplicate delete button in epic

Closes #4064

See merge request gitlab-org/gitlab-ee!3429

changelogs/unreleased-ee/remove-duplicate-delete-btn.yml

+---
+title: Remove duplicate delete button in epic
+merge_request:
+author:
+type: fixed

ee/app/assets/javascripts/epics/epic_show/components/epic_show_app.vue

@@ -121,6 +121,7 @@
           :project-path="projectPath"
           :project-namespace="projectNamespace"
           :show-inline-edit-button="true"
+          :show-delete-button="false"
         />
       </div>
       <epic-sidebar
@@ -135,7 +136,6 @@
         :project-path="projectPath"
         :project-namespace="projectNamespace"
         :show-inline-edit-button="true"
-        :show-delete-button="false"
         issuable-type="epic"
         :editable="canUpdate"
         :initial-start-date="startDate"

spec/ee/spec/features/epics/update_epic_spec.rb

@@ -37,4 +37,18 @@ feature 'Update Epic', :js do
       expect(find('.issuable-details .description')).to have_content('New epic description')
     end
   end
+
+  context 'when user with owner access displays the epic' do
+    before do
+      group.add_owner(user)
+      visit group_epic_path(group, epic)
+      wait_for_requests
+    end
+
+    it 'does not show delete button inside the edit form' do
+      find('.btn-edit').click
+
+      expect(page).not_to have_selector('.issuable-details .btn-danger')
+    end
+  end
 end