Rails Mailer上的RSpec class_spy

时间:2016-07-18 20:39:08

标签: ruby-on-rails rspec actionmailer

我正在尝试测试保存模型时是否使用了特定的邮件程序类。在我的模型中,我有:

class Foo < ActiveRecord::Base
  def send_email
    if some_condition
      FooMailer.welcome.deliver_now
    else
      FooBarMailer.welcome.deliver_now
    end
  end
def

在我对Foo课程的测试中,我有以下内容

it 'uses the foo bar mailer' do
  foo_mailer = class_spy(FooMailer)
  subject.send_email
  # some_condition will evaluate to false here, so we'll use the FooMailer
  expect(foo_mailer).to have_received :welcome
end

当我运行此测试时,它失败了:

(ClassDouble(FooMailer) (anonymous)).welcome(*(any args))
       expected: 1 time with any arguments
       received: 0 times with any arguments

1 个答案:

答案 0 :(得分:3)

问题似乎是你没有用间谍换掉你邮件的当前定义,所以你的间谍没有收到任何消息。要替换它,您可以使用stub_const方法:

it 'uses the foo bar mailer' do
  foobar_mailer = class_spy(FooBarMailer)
  stub_const('FooBarMailer', foobar_mailer)
  subject.send_email
  # some_condition will evaluate to false here, so we'll use the FooBarMailer
  expect(foobar_mailer).to have_received :welcome
end