Always add current user to autocomplete controller to support filter by "Me"

Partial fix #2202

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 v 7.14.0 (unreleased)
+  - Always add current user to autocomplete controller to support filter by "Me" (Stan Hu)
   - Fix multi-line syntax highlighting (Stan Hu)
   - Fix network graph when branch name has single quotes (Stan Hu)
   - Add "Confirm user" button in user admin page (Stan Hu)

app/controllers/autocomplete_controller.rb

@@ -33,6 +33,8 @@ class AutocompleteController < ApplicationController
     @users = @users.search(params[:search]) if params[:search].present?
     @users = @users.active
     @users = @users.page(params[:page]).per(PER_PAGE)
+    # Always include current user if available to filter by "Me"
+    @users = User.find(@users.pluck(:id) + [current_user.id]).uniq if current_user
     render json: @users, only: [:name, :username, :id], methods: [:avatar_url]
   end

features/steps/project/forked_merge_requests.rb

@@ -138,10 +138,11 @@ class Spinach::Features::ProjectForkedMergeRequests < Spinach::FeatureSteps
   end
   step 'I should see the users from the target project ID' do
-    expect(page).to have_selector('.user-result', visible: true, count: 2)
+    expect(page).to have_selector('.user-result', visible: true, count: 3)
     users = page.all('.user-name')
     expect(users[0].text).to eq 'Unassigned'
-    expect(users[1].text).to eq @project.users.first.name
+    expect(users[1].text).to eq current_user.name
+    expect(users[2].text).to eq @project.users.first.name
   end
   # Verify a link is generated against the correct project

spec/controllers/autocomplete_controller_spec.rb

@@ -4,6 +4,7 @@ describe AutocompleteController do
   let!(:project) { create(:project) }
   let!(:user)    { create(:user) }
   let!(:user2)   { create(:user) }
+  let!(:non_member)   { create(:user) }
   context 'project members' do
     before do
@@ -61,6 +62,27 @@ describe AutocompleteController do
     end
   end
+  context 'non-member login for public project' do
+    let!(:project) { create(:project, :public) }
+
+    before do
+      sign_in(non_member)
+      project.team << [user, :master]
+    end
+
+    let(:body) { JSON.parse(response.body) }
+
+    describe 'GET #users with project ID' do
+      before do
+        get(:users, project_id: project.id)
+      end
+
+      it { expect(body).to be_kind_of(Array) }
+      it { expect(body.size).to eq 2 }
+      it { expect(body.map { |u| u['username'] }).to match_array([user.username, non_member.username]) }
+    end
+  end
+
   context 'all users' do
     before do
       sign_in(user)