Merge branch 'mk-fix-breadcrumb-order-33938' into 'master'

app/helpers/groups_helper.rb

@@ -15,7 +15,7 @@ module GroupsHelper
     @has_group_title = true
     full_title = ''
 
-    group.ancestors.each do |parent|
+    group.ancestors.reverse.each do |parent|
       full_title += link_to(simple_sanitize(parent.name), group_path(parent), class: 'group-path hidable')
       full_title += '<span class="hidable"> / </span>'.html_safe
     end

changelogs/unreleased/mk-fix-breadcrumb-order-33938.yml

+---
+title: Fix reversed breadcrumb order for nested groups
+merge_request: 12322
+author:

spec/helpers/groups_helper_spec.rb

 require 'spec_helper'
 
 describe GroupsHelper do
+  include ApplicationHelper
+
   describe 'group_icon' do
     avatar_file_path = File.join(Rails.root, 'spec', 'fixtures', 'banana_sample.gif')
 
@@ -81,4 +83,15 @@ describe GroupsHelper do
       end
     end
   end
+
+  describe 'group_title' do
+    let(:group) { create(:group) }
+    let(:nested_group) { create(:group, parent: group) }
+    let(:deep_nested_group) { create(:group, parent: nested_group) }
+    let!(:very_deep_nested_group) { create(:group, parent: deep_nested_group) }
+
+    it 'outputs the groups in the correct order' do
+      expect(group_title(very_deep_nested_group)).to match(/>#{group.name}<\/a>.*>#{nested_group.name}<\/a>.*>#{deep_nested_group.name}<\/a>/)
+    end
+  end
 end