Return a builds array in builds create service

app/services/ci/create_builds_service.rb

@@ -34,6 +34,7 @@ module Ci
 
           build = commit.builds.create!(build_attrs)
           build.execute_hooks
+          build
         end
       end
     end

spec/services/ci/create_builds_service_spec.rb

+require 'spec_helper'
+
+describe Ci::CreateBuildsService, services: true do
+  let(:commit) { create(:ci_commit) }
+  let(:user) { create(:user) }
+
+  describe '#execute' do
+    subject do
+      described_class.new.execute(commit, stage, 'master', nil, user, nil, status)
+    end
+
+    context 'stubbed .gitlab-ci.yml' do
+      let(:stage) { 'test' }
+      let(:status) { 'success' }
+
+      it { is_expected.to be_an_instance_of Array }
+      it { is_expected.to all(be_an_instance_of Ci::Build) }
+    end
+  end
+end