Rails system tests unable to load a lib file required in a model, file loads fine in development, how can I fix this? - selenium-chromedriver

Question

(From chapter 14 in 'Agile Web Development with Rails 6')
I am trying to run a system test which touches a model which requires a file from the /lib directory. The file loads fine and the code works fine on localhost in development mode, but as soon as I run the test it errors with:
Error:
OrdersTest#test_visiting_the_index:
DRb::DRbRemoteError: cannot load such file -- pago (LoadError)
app/models/order.rb:1:in `<main>'
Excerpt from the model, order.rb, that requires the file is:
require "pago"
class Order < ApplicationRecord
enum pay_type: {
"Cheque" => 0,
"Credit card" => 1,
"Purchase order" => 2
}
has_many :line_items, dependent: :destroy
validates :name, :address, :email, presence: true
validates :pay_type, inclusion: pay_types.keys
def add_line_items_from_cart(cart)
cart.line_items.each do |item|
item.cart_id = nil
line_items << item
end
end
def charge!(pay_type_params)
payment_details = {}
payment_method = nil
case pay_type
when "Cheque"
payment_method = :cheque
payment_details[:routing] = pay_type_params[:routing_number]
payment_details[:account] = pay_type_params[:account_number]
when "Credit card"
payment_method = :credit_card
month,year = pay_type_params[:expiration_date].split(//)
payment_details[:cc_num] = pay_type_params[:credit_card_number]
payment_details[:expiration_month] = month
payment_details[:expiration_year] = year
when "Purchase order"
payment_method = :po
payment_details[:po_num] = pay_type_params[:po_number]
end
payment_result = Pago.make_payment(
order_id: id,
payment_method: payment_method,
payment_details: payment_details
)
if payment_result.succeeded?
OrderMailer.received(self).deliver_later
else
raise payment_result.error
end
end
end
Excerpt from the actual /lib/pago.rb:
require "ostruct"
class Pago
def self.make_payment(order_id:,
payment_method:,
payment_details:)
case payment_method
when :cheque
Rails.logger.info "Processing cheque: " +
payment_details.fetch(:routing).to_s + "/" +
payment_details.fetch(:account).to_s
when :credit_card
Rails.logger.info "Processing credit_card: " +
payment_details.fetch(:cc_num).to_s + "/" +
payment_details.fetch(:expiration_month).to_s + "/" +
payment_details.fetch(:expiration_year).to_s
when :po
Rails.logger.info "Processing purchase order: " +
payment_details.fetch(:po_num).to_s
else
raise "Unknown payment_method #{payment_method}"
end
sleep 3 unless Rails.env.test?
Rails.logger.info "Done Processing Payment"
OpenStruct.new(succeeded?: true)
end
end
The test file that I', trying to run:
test/system/orders_test.rb
require "application_system_test_case"
class OrdersTest < ApplicationSystemTestCase
include ActiveJob::TestHelper
setup do
#order = orders(:one)
end
test "visiting the index" do
visit orders_url
assert_selector "h1", text: "Orders"
end
test "destroying an Order" do
visit orders_url
page.accept_confirm do
click_on "Destroy", match: :first
end
assert_text "Order was successfully destroyed"
end
test "check full payment with cheque flow" do
LineItem.delete_all
Order.delete_all
visit store_index_url
click_on 'Add to cart', match: :first
click_on 'Checkout'
fill_in 'order_name', with: 'Dave Thomas'
fill_in 'order_address', with: '123 Main Street'
fill_in 'order_email', with: 'dave#example.com'
assert_no_selector "#order_routing_number"
select 'Cheque', from: 'Pay type'
fill_in 'Routing #', with: '123456'
fill_in 'Account #', with: '678901'
assert_selector "#order_routing_number"
assert_selector "#order_account_number"
perform_enqueued_jobs { click_button 'Place order' }
orders = Order.all
assert_equal 1, orders.size
order = orders.first
assert_equal 'Dave Thomas', order.name
assert_equal '123 Main Street', order.address
assert_equal 'dave#example.com', order.email
assert_equal 'Cheque', order.pay_type
assert_equal 1, order.line_items.size
mail = ActionMailer::Base.deliveries.last
assert_equal ['dave#example.com'], mail.to
assert_equal 'James Kemp<from#example.com>', mail[:from].value
assert_equal 'Order received; thanks', mail.subject
end
test "check CC number for credit card payment choice" do
visit store_index_url
click_on 'Add to cart', match: :first
click_on 'Checkout'
fill_in 'order_name', with: 'Dave Thomas'
fill_in 'order_address', with: '123 Main Street'
fill_in 'order_email', with: 'dave#example.com'
assert_no_selector "#order_credit_card_number"
assert_no_selector "#order_expiration_date"
select 'Credit card', from: 'Pay type'
assert_selector "#order_credit_card_number"
assert_selector "#order_expiration_date"
end
test "check PO number for purchase order payment choice" do
visit store_index_url
click_on 'Add to cart', match: :first
click_on 'Checkout'
fill_in 'order_name', with: 'Dave Thomas'
fill_in 'order_address', with: '123 Main Street'
fill_in 'order_email', with: 'dave#example.com'
assert_no_selector "#order_po_number"
select 'Purchase order', from: 'Pay type'
assert_selector "#order_po_number"
end
end
If i run rails console require 'pago' returns true. I don't see any clues in the various config and environment files as to what the problem might be. The tutorial code seems to be char by char the same as mine. I just can't work out what's oging wrong here. Can anyone help?
My Gemfile FYI (I have bundle installed):
source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }
ruby '3.0.2'
# Bundle edge Rails instead: gem 'rails', github: 'rails/rails', branch: 'main'
gem 'rails', '~> 6.1.4', '>= 6.1.4.1'
# Use sqlite3 as the database for Active Record
gem 'sqlite3', '~> 1.4'
# Use Puma as the app server
gem 'puma', '~> 5.0'
# Use SCSS for stylesheets
gem 'sass-rails', '>= 6'
# Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker
gem 'webpacker', '~> 5.0'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.7'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use Active Model has_secure_password
# gem 'bcrypt', '~> 3.1.7'
# Use Active Storage variant
# gem 'image_processing', '~> 1.2'
# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.4.4', require: false
group :development, :test do
# Call 'byebug' anywhere in the code to stop execution and get a debugger console
gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
end
group :development do
# Access an interactive console on exception pages or by calling 'console' anywhere in the code.
gem 'web-console', '>= 4.1.0'
# Display performance information such as SQL time and flame graphs for each request in your browser.
# Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
gem 'rack-mini-profiler', '~> 2.0'
gem 'listen', '~> 3.3'
# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring'
end
group :test do
# Adds support for Capybara system testing and selenium driver
gem 'capybara', '>= 3.26'
gem 'selenium-webdriver'
# Easy installation and use of web drivers to run system tests with browsers
gem 'webdrivers'
end
# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]