RSpec 测试 ActionCable 通道的未定义方法“stub_connection”

Question

我有以下测试：

require "rails_helper"

RSpec.describe MyChannel, type: :channel do
  let (:current_user) { User.first }

  it "subscribes to a unique room for the user" do
    stub_connection current_user: User.first
    subscribe
    expect(subscription).to be_confirmed
    expect(streams).to include("my_channel_#{current_user.id}")
  end
end

失败并出现此错误：

 Failure/Error: stub_connection current_user: User.first

 NoMethodError:
   undefined method `stub_connection' for #<RSpec::ExampleGroups::MyChannel:0x00000000deadbeef>
 # ./spec/channels/my_channel_spec.rb:7:in `block (2 levels) in <top (required)>'

根据 the documentation 和我找到的所有示例，stub_connection 应该在 RSpec 频道测试中自动可用。我做错了什么？

Answer 1

我需要安装 action-cable-testing gem. As of when I'm writing this answer, this gem's functionality is slated to be integrated directly into Rails at some point in Rails 6。

installing the gem, make sure to require the gem in your rails_helper.rb file之后：

RSpec Usage

First, you need to have rspec-rails installed.

Second, add this to your "rails_helper.rb" after requiring environment.rb:

require "action_cable/testing/rspec"

RSpec 测试 ActionCable 通道的未定义方法“stub_connection”

Undefined method `stub_connection' in RSpec test for ActionCable channel

ruby

rspec

ruby-on-rails-5

actioncable

RSpec Usage