Question

我在测试我的rails应用程序时遇到了一些麻烦。我只是在学习如何测试，所以我认为这对你来说应该没问题。我有这个产品架构：

create_table "products", force: :cascade do |t|
  t.string   "title"
  t.text     "description"
  t.string   "image_url"
  t.decimal  "price"
  t.datetime "created_at",  null: false
  t.datetime "updated_at",  null: false
end

这个模型：

class Product < ActiveRecord::Base
  validates :title, :description, :image_url, presence: true
  validates :price, numericality: {greater_than_or_equal_to: 0.01}
  validates :title, uniqueness: true
  validates :image_url, allow_blank: true, format: {
    with: %r{\.(gif|jpg|png)\Z}i,
    message: 'must be a URL for GIF, JPG or PNG image.'
  }
end

和这个控制器：

   #some lines omitted...
  def create
    @product = Product.new(product_params)
    respond_to do |format|
    if @product.save
      format.html { redirect_to @product, notice: 'Product was successfully created.' }
    format.json { render :show, status: :created, location: @product }
  else
    format.html { render :new }
    format.json { render json: @product.errors, status: :unprocessable_entity }
  end
end
private
def product_params
  params.require(:product).permit(:title, :description, :image_url, :price)
end

所以，我正在进行这项测试：

setup do
  @product = products(:one)
  @update = {
    title: 'Lorem Ipsum',
    description: 'Wibbles are fun!',
    image_url: 'lorem.jpg',
    price: 19.95
}
end

test "should create product" do
  assert_difference('Product.count') do
  process :create, method: :post, params: @update
end

但我得到0次失败并出现1次错误。

Error:
ProductsControllerTest#test_should_create_product:
ActionController::ParameterMissing: param is missing or the value is empty: product
app/controllers/products_controller.rb:72:in `product_params'
app/controllers/products_controller.rb:27:in `create'
test/controllers/products_controller_test.rb:30:in `block (2 levels) in <class:ProductsControllerTest>'
test/controllers/products_controller_test.rb:29:in `block in <class:ProductsControllerTest>'

我必须说我只是将rails 4.2升级到5.0.0.1。我正在按照“使用rails 5进行敏捷开发”这本书的说法，但是如果我按照本书所说的那样进行测试就行不通了，我认为自从本书写完以来，rails已经改变了。我试图在很多方面做到这一点，但我无法弄清楚。我究竟做错了什么？

感谢您的帮助！

Answer 1

我的猜测是@update必须看起来像这样

@update = {
  product: {
    title: 'Lorem Ipsum',
    description: 'Wibbles are fun!',
    image_url: 'lorem.jpg',
    price: 19.95 
  }
}

rails“rake test”错误“param is missing”。

1 个答案: