ruby-on-rails - 调用 ActiveJob::TestHelper 方法会导致 SystemStackError:堆栈级别太深

Question

我使用的是 Rails 5.1.6 和 Ruby 2.5.1(虽然在以前的版本中有同样的错误)。

将邮件程序从 deliver_now 切换到 deliver_later。在我的浏览器中运行良好，但是我一直在尝试让我的集成测试正常工作。似乎使用 ActiveJob::TestHelper 中的任何方法会触发以下错误:

Error: SendJobToContactsTest#test_send_job_to_contacts: SystemStackError: stack level too deep

集成测试代码:

require 'test_helper'
include ActiveJob::TestHelper

class SendJobToContactsTest < ActionDispatch::IntegrationTest
...
end

这很好用:

assert_difference 'ContactJob.count', 1 do
    patch update_contacts_user_job_path(@user, @job), params: {job: {contact_ids: [ @contact2.id], message: {message_text: "This is a test"}}}
end

使用 performed_enqueued_jobs 触发 SystemStackError:

assert_difference 'ContactJob.count', 1 do
  perform_enqueued_jobs do
     patch update_contacts_user_job_path(@user, @job), params: {job: {contact_ids: [ @contact2.id], message: {message_text: "This is a test"}}}
  end
end

即使只是 assert_enqueued_jobs 而没有 performed_enqueued_jobs 也会触发 SystemStackError:

assert_difference 'ContactJob.count', 1 do
  patch update_contacts_user_job_path(@user, @job), params: {job: {contact_ids: [ @contact2.id], message: {message_text: "This is a test"}}}
  assert_enqueued_jobs 1
end

事实证明，即使只是调用一个空的 perform_enqueued_jobs block (不涉及我的代码)也会触发堆栈级别太深的问题:

perform_enqueued_jobs do
 # do something later
end

Answer 1

原来问题出在我有包含语句的地方。在类里面移动它解决了这个问题:

require 'test_helper'


class SendJobToContactsTest < ActionDispatch::IntegrationTest
  include ActiveJob::TestHelper