ruby-on-rails - rspec 使用 draper Decorator 测试 View

Question

我尝试用 Rspec 测试我的观点。在我看来，我有一个由 Draper 生成的装饰器。这个装饰器由 decent_exposure gem 公开。

我这样创建我的 rspec 测试:

require 'spec_helper'

describe "boats/show.html.slim" do

  let(:boat_decorate) { BoatDecorator.new(get_boat) }
  let(:search) { Search.new }

  before do
    view.stub(:boat_decorate) { boat_decorate }
    view.stub(:search) { search }
    render :template => 'boats/show.html.slim'
  end 

  it 'should see titlte' do
    rendered.should have_selector(:h1, :content => boat_decorate.title)
  end                                                                                                                                                                                
end

在我的助手 stub 中，我生成了 Draper Decorator。在这个 Decorator 中，我有调用一些助手 link_to 的方法。

class BoatDecorator < ApplicationDecorator

  decorates :boat

  def region_link
    h.link_to region_name, '#', :title => region_name                                                                                                                                
  end

end

但是如果我启动这个测试我有一个错误:

  1) boats/show.html.slim should see titlte
     Failure/Error: render :template => 'boats/show.html.slim'
     ActionView::Template::Error:
       undefined method `link_to' for nil:NilClass

我不希望装饰器对所有助手调用 stub 。那我该怎么做呢？

Answer 1

我们需要像 Decorator 规范那样做并在设置中添加:ApplicationController.new.set_current_view_context

require 'spec_helper'

describe "boats/show.html.slim" do

  let(:boat_decorate) { BoatDecorator.new(get_boat) }
  let(:search) { Search.new }

  before do
    ApplicationController.new.set_current_view_context
    view.stub(:boat_decorate) { boat_decorate }
    view.stub(:search) { search }
    render :template => 'boats/show.html.slim'
  end 

  it 'should see titlte' do
    rendered.should have_selector(:h1, :content => boat_decorate.title)
  end                                                                                                                                                                                
end