How to test Devise Async with Sidekiq? - ruby-on-rails-4

Question

Thanks in advance!
Sidekiq is working just fine, but I cannot manage to test it with Devise Async, or should I say that I cannot test the latter?
According to Sidekiq's documentation, when test mode is set to fake!, any job given to a worker is pushed to an array named jobs of that same worker. So it is trivial to test the increase of this array.
But, with Devise Async, it is not so trivial, although its backend includes Sidekiq::Worker. Here's a small list of things that I tried to test:
Devise::Async::Backend::Sidekiq.jobs
Devise::Mailer.deliveries
ActionMailer::Base.deliveries
Devise::Async::Backend::Worker.jobs
None of these testing subjects points an increase in size. Since Devise sends its emails as models callbacks, I tried testing both in a model and in a controller spec. Using Factory Girl and Database Cleaner, I also tried both modes: transaction and truncation. Needless to say that I also tried both modes of Sidekiq: fake! and inline!.
What am I missing?

Answer 1

As mentioned in the documentation, you can check the queue size as
Sidekiq::Extensions::DelayedMailer.jobs.size

Answer 2

Was working on this issue, chanced upon a beautiful implementation done by gitlab which I thought might be helpful in testing devise-async or email that are push via the sidekiq queue.
spec_helper.rb
email_helpers.rb
By adding these lines in spec_helper.rb
# An inline mode that runs the job immediately instead of enqueuing it
require 'sidekiq/testing/inline'
# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }
RSpec.configure do |config|
config.include EmailHelpers
# other configurations line
end
And adding /spec/support/email_helpers.rb
module EmailHelpers
def sent_to_user?(user)
ActionMailer::Base.deliveries.map(&:to).flatten.count(user.email) == 1
end
def should_email(user)
expect(sent_to_user?(user)).to be_truthy
end
def should_not_email(user)
expect(sent_to_user?(user)).to be_falsey
end
end
To run the test for example testing your forgot password, I am assuming you know rspec, factorygirl, capybara
/spec/features/password_reset_spec.rb
require 'rails_helper'
feature 'Password reset', js: true do
describe 'sending' do
it 'reset instructions' do
#FactoryGirl create
user = create(:user)
forgot_password(user)
expect(current_path).to eq(root_path)
expect(page).to have_content('You will receive an email in a few minutes')
should_email(user)
end
end
def forgot_password(user)
visit '/user/login'
click_on 'Forgot password?'
fill_in 'user[email]', with: user.email
click_on 'Reset my password'
user.reload
end
end
You would notice that in this test implementation
will cause sidekiq to run the job instead of enqueuing it,
The user model email attribute must be called email or you can just replace the code above.
ActionMailer::Base.deliveries.map(&:to).flatten.count(user.email) == 1 check to see ActionMailer::Base.deliveries is delivering to user.email