How do I unsubscribe testing about action-cable-testing

[palkan]

Hi!

There is no helpers to perform an unsubscribe action (probably, we should add one). You can try to do the following:

require "rails_helper"

RSpec.describe EchoChannel, type: :channel do
  it "subscribes and unsubscribed" do
    subscribe
    expect(subscription).to be_confirmed
    
    # that's the way to perform an `unsubscribe` command
    subscription.unsubscribe_from_channel
  end
end

Btw, what is your use-case? What do you want to test?

[palkan]

Got it!

Thanks for the example!

[kontotto]

Thank you for your quick response!
subscription.unsubscribe_from_channel is correctly operated.

I tried to test below situation.
When user subscribed room, user.room is that room. And, if user unsubscribed room, user.room is nil.
Although it may be clumsy, it is faster for you to see the code

module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :current_user

    ~~~
  end
end

class RoomChannel < ApplicationCable::Channel
  def subscribed
    @room = Room.find(params[:room_id])
    stream_for @room

    current_user.room = @room
    current_user.save
  end

  def unsubscribed
    current_user.room = nil
    current_user.save
  end

  ~~~
end

require 'test_helper'
class RoomChannelTest < ActionCable::Channel::TestCase
  test "user.room equals nil when unsubscribed" do
    user = User.find(1)
    stub_connection(current_user: user)

    subscribe room_id: 1
    assert subscription.confirmed?

    user = User.find(1)
    assert_not_nil user.room

    subscription.unsubscribe_from_channel

    user = User.find(1)
    assert_nil user.room
  end

  ~~~
end