Add specs for showing filenames with non-ASCII characters

spec/features/projects/tree/tree_show_spec.rb

@@ -37,6 +37,16 @@ describe 'Projects tree', :js do
     expect(page).not_to have_selector('.flash-alert')
   end
 
+  it 'renders tree table with non-ASCII filenames without errors' do
+    visit project_tree_path(project, File.join(test_sha, 'encoding'))
+    wait_for_requests
+
+    expect(page).to have_selector('.tree-item')
+    expect(page).to have_content('Files, encoding and much more')
+    expect(page).to have_content('テスト.txt')
+    expect(page).not_to have_selector('.flash-alert')
+  end
+
   context 'gravatar disabled' do
     let(:gravatar_enabled) { false }
 

spec/lib/gitlab/tree_summary_spec.rb

@@ -129,6 +129,17 @@ describe Gitlab::TreeSummary do
         expect(commits).to satisfy_one { |c| c.id == whitespace_commit_sha }
       end
     end
+
+    context 'in a subdirectory with non-ASCII filenames' do
+      let(:path) { 'encoding' }
+
+      it 'returns commits for entries in the subdirectory' do
+        entry = entries.find { |x| x[:file_name] == 'テスト.txt' }
+
+        expect(entry).to be_a(Hash)
+        expect(entry).to include(:commit)
+      end
+    end
   end
 
   describe '#more?' do