ajax - 如何在 Rspec 中使用 Ajax 测试图像的移除

Question

我在页面上有一张图片，我通过 Ajax 删除了它。

我想测试删除图片。

Controller :

def destroy

    current_image = Image.find(params[:id])
    current_car = current_image.car

    Image.delete_image_file(params[:id])    
    flash[:notice] = t('activerecord.errors.controllers.message.attributes.image.image_destroy_success')

    @images = current_car.images.order("order_id")

    respond_to do |format|
      format.html { redirect_to images_path(:car_id => params[:id]) }
      format.js
    end

  end

文件 destroy.js.erb - 刷新 View 并显示闪现消息

$('#image_list').html("<%= escape_javascript(render('list')) %>")
$('#div_flash_box').html("<%= escape_javascript(render :partial => 'layouts/flash', :locals => { :flash => flash }).html_safe %>")

图片查看:_list.html.erb

<ul id="ul_images" data-update-url="<%= sort_images_url %>">  
  <% @images.each do |image| %>
    <%= content_tag_for :li, image, :class => 'ui-state-default' do %>     
     <%= link_to image_tag("#{RAILS_CAR_VIEW_IMAGES}" + "#{image.name}/" + image.image_thumb_file), "#{RAILS_CAR_VIEW_IMAGES}" + "#{image.name}/" + image.image_file, :class => 'group1' %>
     <div class="div-images-delete"><%= link_to t('views.buttons.delete'), image, :method => :delete, :remote => true, :confirm => t('views.forms.confirm') %></div>
    <% end %>
  <% end %>
</ul>

我在 Rspec 中的测试

it "should delete an image using Ajax" do
  lambda do
    xhr :delete, :destroy, :id => @image.id
    response.should be_success
  end.should change(Image, :count).by(-1)  
end



it "should destroy image" do
   xhr :delete, :destroy, :format => "html"
   flash[:notice].should == I18n.t('activerecord.errors.controllers.message.attributes.image.image_destroy_success')
end

汽车和图像是有关系的

class Image < ActiveRecord::Base
  belongs_to :car,
   :foreign_key => "car_id"

class Car < ActiveRecord::Base

  has_many :images

失败:

1) 已登录用户的 ImagesController 应使用 Ajax 删除图像 失败/错误:xhr :delete, :destroy, :id => @image.id 没有方法错误: 未定义的方法 images' for nil:NilClass
# ./app/controllers/images_controller.rb:32:in破坏' # ./spec/controllers/images_controller_spec.rb:36:in block (4 levels) in <top (required)>'
# ./spec/controllers/images_controller_spec.rb:35:in '

中的 block (3 级)

2) 已登录用户的 ImagesController 应该销毁图像 失败/错误:xhr :delete, :destroy, :format => "html" Action Controller ::路由错误: 没有路由匹配 {:format=>"html", :controller=>"images", :action=>"destroy"} # ./spec/controllers/images_controller_spec.rb:42:in `block (3 levels) in '

怎么了？

Answer 1

对于第一个错误，我认为是在测试环境中没有设置current_car对象。这就是调用 .images 时出现 NilClass 错误的原因。