如何在关注中模拟一个方法？

Question

我有 FooConcern 和 BarService 如下：

module FooConcern
  extend ActiveSupport::Concern

  def notify_slack(message)
    # send message to slack
  end
end

class BarService
  include FooConcern

  def run
    # do some stuff
    message = 'blah, blah'
    notify_slack(message)
  end
end

我如何编写模拟 notify_slack，这样当我运行 Rspec 测试 BarService#run 时我实际上不会调用 slack API？

RSpec.describe BarService do
  describe 'run' do
    subject { described_class.new.run }

    it do
      # some tests on things other than notifying slack
    end
  end
end

Answer 1

您可以使用 allow 模拟该方法。

RSpec.describe BarService do
   describe 'run' do
     subject { described_class.new }

     it do
       allow(subject).to receive(:notify_slack).and_return(true)
       # some tests on things other than notifying slack
       subject.run
     end
   end
 end

如何在关注中模拟一个方法？

How to mock a method inside concern?

ruby-on-rails

rspec

activesupport-concern