snippet.rb

require 'test_helper'

class CartTest < ActiveSupport::TestCase
  
  test "initialize" do
    cart = Cart.new
    assert_equal 0, cart.items.length
  end
  
  test "add product" do
    cart = Cart.new
    cart << products(:one)
    assert_equal 1, cart.items.length
  end

  test "add multiple products" do
    cart = Cart.new
    cart << (products(:one))
    cart << (products(:two))
    assert_equal 2, cart.items.length
  end
  
  test "add product increments existing products" do
    cart = Cart.new
    5.times { cart << products(:one) }
    assert_equal 5, cart.items.first.quantity
  end
  
  test "total price math check" do
    cart = Cart.new
    cart << products(:one)
    cart << products(:two)
    assert_equal products(:one).price + products(:two).price, cart.total_price
  end
  
  test "total quantity math check" do
    cart = Cart.new
    2.times{ cart << products(:one) }
    cart << products(:two)
    assert_equal 3, cart.total_items
  end
  
end