Indicate on Status if Issue was Moved

Add the text `(moved)` to the `Closed` status indicator on a closed
issue if the reason the issue was closed was due to moving it.

This only applies to closed issues. Issues that were closed and moved
then later re-opened only show `Open`. This makes it more immidately
clear why the issue was closed.

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

@@ -15,7 +15,10 @@
     .issuable-status-box.status-box.status-box-issue-closed{ class: issue_button_visibility(@issue, false) }
       = sprite_icon('mobile-issue-close', size: 16, css_class: 'd-block d-sm-none')
       %span.d-none.d-sm-block
-        Closed
+        - if @issue.moved?
+          = _("Closed (moved)")
+        - else
+          = _("Closed")
     .issuable-status-box.status-box.status-box-open{ class: issue_button_visibility(@issue, true) }
       = sprite_icon('issue-open-m', size: 16, css_class: 'd-block d-sm-none')
       %span.d-none.d-sm-block Open

changelogs/unreleased/36445-better-indication-that-an-issue-has-been-moved-or-marked-as-duplicated.yml

+---
+title: Indicate on Issue Status if an Issue was Moved
+merge_request: 24470
+author:
+type: added

locale/gitlab.pot

@@ -1488,6 +1488,9 @@ msgstr ""
 msgid "Closed"
 msgstr ""
 
+msgid "Closed (moved)"
+msgstr ""
+
 msgid "ClusterIntegration| is the default environment scope for this cluster. This means that all jobs, regardless of their environment, will use this cluster. %{environment_scope_start}More information%{environment_scope_end}"
 msgstr ""
 

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

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'projects/issues/show' do
+  let(:project) { create(:project, :repository) }
+  let(:issue) { create(:issue, project: project, author: user) }
+  let(:user) { create(:user) }
+
+  before do
+    assign(:project, project)
+    assign(:issue, issue)
+    assign(:noteable, issue)
+    stub_template 'shared/issuable/_sidebar' => ''
+    stub_template 'projects/issues/_discussion' => ''
+    allow(view).to receive(:issuable_meta).and_return('')
+  end
+
+  context 'when the issue is closed' do
+    before do
+      allow(issue).to receive(:closed?).and_return(true)
+    end
+
+    it 'shows "Closed (moved)" if an issue has been moved' do
+      allow(issue).to receive(:moved?).and_return(true)
+
+      render
+
+      expect(rendered).to have_selector('.status-box-issue-closed:not(.hidden)', text: 'Closed (moved)')
+    end
+
+    it 'shows "Closed" if an issue has not been moved' do
+      render
+
+      expect(rendered).to have_selector('.status-box-issue-closed:not(.hidden)', text: 'Closed')
+    end
+  end
+
+  context 'when the issue is open' do
+    before do
+      allow(issue).to receive(:closed?).and_return(false)
+      allow(issue).to receive(:disscussion_locked).and_return(false)
+    end
+
+    it 'shows "Open" if an issue has been moved' do
+      render
+
+      expect(rendered).to have_selector('.status-box-open:not(.hidden)', text: 'Open')
+    end
+  end
+end