You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: collection_test.rb
    path of file: ./repos/workarea/core/test/models/workarea/pricing
    
    the code of the file until where you have to start completion: require 'test_helper'

module Workarea
  module Pricing
    class CollectionTest < TestCase
      def test_on_sale?
        refute(Collection.new([]).on_sale?)

        create_pricing_sku(
         
    
      def test_sale_min_price
        create_pricing_sku(id: 'SKU1', prices: [{ regular: 1.to_m, sale: 3.to_m }])
        create_pricing_sku(id: 'SKU2', prices: [{ regular: 2.to_m, sale: 4.to_m }])
        create_pricing_sku(id: 'SKU3', prices: [{ regular: 3.to_m }])

        assert_equal(3.to_m, Collection.new(%w(SKU1 SKU2 SKU3)).sale_min_price)
      end