Add id to user of ZentaoSerializers

Fix bug where zentao issues could not render
due to missing id.

Changelog: fixed
EE: true

ee/app/serializers/integrations/zentao_serializers/issue_entity.rb

@@ -79,6 +79,7 @@ module Integrations
         return {} unless user.present?
 
         {
+          "id": user['id'],
           "name": sanitize(user['realname'].presence || user['account']),
           "web_url": user['url'],
           "avatar_url": user['avatar']

ee/spec/serializers/integrations/zentao_serializers/issue_entity_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Integrations::ZentaoSerializers::IssueEntity do
+  let_it_be(:zentao_integration) { create(:zentao_integration) }
+  let_it_be(:project) { zentao_integration.project }
+
+  let(:zentao_issue) do
+    { id: 'story-34',
+      title: 'Issue from ZenTao',
+      labels: %w[Backend L1],
+      pri: 3,
+      openedDate: '2021-01-01T00:00:00Z',
+      openedBy: {
+        id: 1, account: 'admin',
+        realname: 'admin',
+        avatar: 'http://example.com/avatar/1',
+        url: 'http://example.com/users/1'
+      },
+      lastEditedDate: '2021-01-02T00:00:00Z',
+      lastEditedBy: 'admin',
+      status: issue_status,
+      url: 'http://example.com/issues/1',
+      assignedTo: [
+        { id: 2,
+          account: 'productManager',
+          realname: 'productManager',
+          avatar: 'http://example.com/avatar/2',
+          url: 'http://example.com/users/2' }
+      ] }.deep_stringify_keys
+  end
+
+  subject { described_class.new(zentao_issue, project: project).as_json }
+
+  context 'when status is "opened"' do
+    let(:issue_status) { 'opened' }
+
+    it 'returns the ZenTao issues attributes' do
+      expected_hash = common_expected_hash.merge(
+        status: 'opened', state: 'opened', closed_at: nil)
+
+      expect(subject).to include(expected_hash)
+    end
+  end
+
+  context 'when status is "closed"' do
+    let(:issue_status) { 'closed' }
+
+    it 'returns the ZenTao issues attributes' do
+      expected_hash = common_expected_hash.merge(
+        status: 'closed', state: 'closed', closed_at: '2021-01-02T00:00:00Z'.to_datetime)
+
+      expect(subject).to include(expected_hash)
+    end
+  end
+
+  private
+
+  def common_expected_hash
+    { id: 'story-34',
+      project_id: project.id,
+      title: 'Issue from ZenTao',
+      created_at: '2021-01-01T00:00:00Z'.to_datetime,
+      updated_at: '2021-01-02T00:00:00Z'.to_datetime,
+      labels: [
+        { id: 'Backend',
+          title: 'Backend',
+          name: 'Backend',
+          color: '#0052CC',
+          text_color: '#FFFFFF' },
+        { id: 'L1',
+          title: 'L1',
+          name: 'L1',
+          color: '#0052CC',
+          text_color: '#FFFFFF' }
+      ],
+      author: { id: 1,
+        name: 'admin',
+        web_url: 'http://example.com/users/1',
+        avatar_url: 'http://example.com/avatar/1' },
+      assignees: [{ id: 2,
+        name: 'productManager',
+        web_url: 'http://example.com/users/2',
+        avatar_url: 'http://example.com/avatar/2' }],
+      web_url: 'http://example.com/issues/1',
+      gitlab_web_url: "/#{project.full_path}/-/integrations/zentao/issues/story-34" }
+  end
+end