Activity Description

Add unit tests which add unique products and duplicate products. Note that you will need to modify the fixture to refer to products and carts by name, for example product: ruby.

Author’s Solutions

blah

Readers’ Solutions

Long says

My attempt:

In test/unit/cart_test.rb:

  def new_cart_with_one_product(product_name)
    cart = Cart.create
    cart.add_product(products(product_name).id)
    cart
  end

  test 'cart should create a new line item when adding a new product' do
    cart = new_cart_with_one_product(:one)
    assert_equal 1, cart.line_items.count
    # Add a new product
    cart.add_product(products(:ruby).id)
    assert_equal 2, cart.line_items.count
  end

  test 'cart should update an existing line item when adding an existing product' do
    cart = new_cart_with_one_product(:one)
    # Re-add the same product
    cart.add_product(products(:one).id)
    assert_equal 1, cart.line_items.count
  end

h4. Arun says I am doubtful whether the question was about creating a new and duplicate line items or products. I thought the answer is along the lines of


  test "unique_product_should_be_saved" 
    product = Product.new(:title => "unique-title",
                          :description => "a unique product",
                          :image_url => "unique.png",
                          :price => 22)
    assert product.save

  end

  test "non_unique_product_should_error_out" 
    product = Product.new(:title => "unique-title",
                          :description => "a unique product",
                          :image_url => "unique.png",
                          :price => 22)
    assert !product.save
    assert_equal "has  not been saved since it is a duplicate ", product.errors[:title].join('; ')
  end