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: image_collection_test.rb
    path of file: ./repos/workarea/storefront/test/view_models/workarea/storefront/product_view_model
    
    the code of the file until where you have to start completion: require 'test_helper'

module Workarea
  module Storefront
    class ProductViewModel
      class ImageCollectionTest < TestCase
        def all_images
          @all_images ||= [
            Catalog::ProductImage.new(image_name: 'foo'),
            Catalog::ProductImage.new(image_name: 'bar'),
            Catalog::ProductImage.new(image_name: 'baz')
          ]
        end

        def additional_images
          @additional_images ||=
            [Catalog::ProductImag
    
        def test_initialize
          image_collection = ImageCollection.new(product, {}, custom_images)
          assert_equal(custom_images, image_collection.all)

          image_collection = ImageCollection.new(product)
          assert_equal(all_images, image_collection.all)

          image_collection = ImageCollection.new(product, {}, [])
          assert_equal([], image_collection.all)

          image_collection_a = ImageCollection.new(product, {}, all_images)
          image_collection_b = ImageCollection.new(product, {}, additional_images)
          image_collection_c = image_collection_a + image_collection_b
          combined_images = all_images + additional_images
          assert_equal(combined_images.sort, image_collection_c.all.sort)
        end