Omniauth integration testing

test_helper.rb

ENV['RAILS_ENV'] ||= 'test'
require_relative '../config/environment'
require 'rails/test_help'

OmniAuth.config.test_mode = true

class ActiveSupport::TestCase
# ...some code here

  def login_shop(shop)
    # remove this line for omniAuth logs
    OmniAuth.config.logger = Rails.logger
    OmniAuth.config.test_mode = true
    OmniAuth.config.add_mock(:shopify,
                             provider: 'shopify',
                             uid: shop.shopify_domain,
                             credentials: {token: shop.shopify_token}
    )
    Rails.application.env_config["omniauth.auth"] = OmniAuth.config.mock_auth[:shopify]
    get "/auth/shopify"
    follow_redirect!
  end
end