Allow Emails to be view using actionmailer test deliveries

[grantspeelman]

It's possible to add emails into test flows using actionmailer test deliveries.

The core code below:

config/initializers/cypress_on_rails.rb

if defined?(CypressOnRails)
  CypressOnRails.configure do |c|
    c.cypress_folder = File.expand_path("#{__dir__}/../../cypress")
    c.use_middleware = !Rails.env.production?
    c.logger = Rails.logger
  end

  if ENV['CYPRESS'].present?
    Rails.application.configure do
      config.active_job.queue_adapter = :inline
      ActionMailer::Base.delivery_method = :test
      config.action_mailer.delivery_method = :test
      config.action_mailer.default_url_options = { host: 'http://localhost:5017' }
    end
  end
end

routes.rb

Rails.application.routes.draw do
  scope path: '/__cypress__', controller: 'cypress' do
    get 'view_email', action: 'view_email'
  end
end

app/controllers/cypress_controller.rb

class CypressController < ActionController::Base # rubocop:disable Rails/ApplicationController
  def view_email
    email = params.require(:email)
    @mail = ActionMailer::Base.deliveries.reverse.find { |mail| mail.to.include?(email) }
    render layout: false
  end
end

app/views/cypress/view_email

<% if @mail %>
  Subject: <%= @mail.subject %>
  <hr>
  <%= raw(@mail.html_part ? @mail.html_part.body : @mail.body) %>
<% else %>
  No Email found
<% end %>

This needs to be converted to work automatically and README example needs to be added