DistroPropaganda/code/rails31/depot_p/test/unit/cart_test.rb

#---
# Excerpted from "Agile Web Development with Rails",
# published by The Pragmatic Bookshelf.
# Copyrights apply to this code. It may not be used to create training material,
# courses, books, articles, and the like. Contact us if you are in doubt.
# We make no guarantees that this code is fit for any purpose.
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#---
require 'test_helper'

class CartTest < ActiveSupport::TestCase
  def setup
    @cart  = Cart.create
    @book_one = products(:ruby)
    @book_two  = products(:two)
  end
  
  test "add unique products" do
    @cart.add_product(@book_one.id).save!
    @cart.add_product(@book_two.id).save!
    assert_equal 2, @cart.line_items.size
    assert_equal @book_one.price + @book_two.price, @cart.total_price
  end

  test "add duplicate product" do
    @cart.add_product(@book_one.id).save!
    @cart.add_product(@book_one.id).save!
    assert_equal 2*@book_one.price, @cart.total_price
    assert_equal 1, @cart.line_items.size
    assert_equal 2, @cart.line_items[0].quantity
  end 
end