Merge branch 'winh-new-merge-request-encoding' into 'master'

Fix encoding of branch names on compare and new merge request page

Closes #46627

See merge request gitlab-org/gitlab-ce!19143

app/assets/javascripts/compare_autocomplete.js

@@ -54,7 +54,7 @@ export default function initCompareAutocomplete(limitTo = null, clickHandler = (
             .attr('href', '#')
             .addClass(ref === selected ? 'is-active' : '')
             .text(ref)
-            .attr('data-ref', escape(ref));
+            .attr('data-ref', ref);
           return $('<li />').append(link);
         }
       },

changelogs/unreleased/winh-new-merge-request-encoding.yml

+---
+title: Fix encoding of branch names on compare and new merge request page
+merge_request: 19143
+author:
+type: fixed

spec/features/merge_request/user_selects_branches_for_new_mr_spec.rb

@@ -4,6 +4,12 @@ describe 'Merge request > User selects branches for new MR', :js do
   let(:project) { create(:project, :public, :repository) }
   let(:user) { project.creator }
+  def select_source_branch(branch_name)
+    find('.js-source-branch', match: :first).click
+    find('.js-source-branch-dropdown .dropdown-input-field').native.send_keys branch_name
+    find('.js-source-branch-dropdown .dropdown-content a', text: branch_name, match: :first).click
+  end
+
   before do
     project.add_master(user)
     sign_in(user)
@@ -43,8 +49,7 @@ describe 'Merge request > User selects branches for new MR', :js do
   it 'generates a diff for an orphaned branch' do
     visit project_new_merge_request_path(project)
-    find('.js-source-branch', match: :first).click
-    find('.js-source-branch-dropdown .dropdown-content a', text: 'orphaned-branch', match: :first).click
+    select_source_branch('orphaned-branch')
     click_button "Compare branches"
     click_link "Changes"
@@ -169,4 +174,31 @@ describe 'Merge request > User selects branches for new MR', :js do
       end
     end
   end
+
+  context 'with special characters in branch names' do
+    it 'escapes quotes in branch names' do
+      special_branch_name = '"with-quotes"'
+      CreateBranchService.new(project, user)
+        .execute(special_branch_name, 'add-pdf-file')
+
+      visit project_new_merge_request_path(project)
+      select_source_branch(special_branch_name)
+
+      source_branch_input = find('[name="merge_request[source_branch]"]', visible: false)
+      expect(source_branch_input.value).to eq special_branch_name
+    end
+
+    it 'does not escape unicode in branch names' do
+      special_branch_name = 'ʕ•ᴥ•ʔ'
+      CreateBranchService.new(project, user)
+        .execute(special_branch_name, 'add-pdf-file')
+
+      visit project_new_merge_request_path(project)
+      select_source_branch(special_branch_name)
+
+      click_button "Compare branches"
+
+      expect(page).to have_button("Submit merge request")
+    end
+  end
 end