如何使用 rspec 测试搜索视图页面？

Question

# encoding: utf-8
class UsersController < ApplicationController

  def index
    @search = User.search(params[:search])
    @users = @search.paginate :per_page => 20, :page => params[:page]
  end

end


<h2>User search</h2>
<%= form_for @search, :url => users_path, :html => { :method => :get } do |f| %>
#some form elements
<% end %>

<% @users.each do |user| %> 
# show user info
<% end %>

现在如何使用 rspec 2 测试视图？

# encoding: utf-8
require 'spec_helper'

describe "users/index.html.erb" do
  before(:each) do

    ####@user = stub_model(User)
            ######User.stub!(:search).and_return(@post)
      How to mock? If not mock(or stubed), it will got a nil error when rspec test.


  end

  it "renders a list of users" do
    render

    rendered.should contain("User search")
  end
end

Answer 1

it "renders a list of users" do
  assign(:search, stub_model(???)) # see note
  assign(:users, [stub_model(User)]
  render
  rendered.should contain("User search")
end

assign 允许规范引用普通视图中预期的实例变量。 @users 需要是一个数组，因此需要括号。

注意：将问号替换为从 User.search 返回的任何类型的对象。

编辑

嗯，这比乍一看要棘手。我找不到一种简单的方法来模拟一个可以响应必要消息以使该规范通过的对象。快速而肮脏的方法是只使用真实的对象：

it "renders a list of users" do
  assign(:search, User.search)
  assign(:users, [stub_model(User)]
  render
  rendered.should contain("User search")
end

缺点是这需要数据库连接才能工作。我们可以破解我们自己的辅助对象：

class MetaSearchTestHelper
  extend ActiveModel::Naming
  include ActiveModel::Conversion
  attr_accessor :model_name
  def initialize(options={})
    @model_name = options[:model_name] || nil
  end
  def singular
    @model_name ? @model_name.downcase : nil
  end
  def persisted?
    false
  end
end

it "renders a list of users" do
  assign(:search, MetaSearchTestHelper.new(:model_name=>"User")
  assign(:users, [stub_model(User)]
  render
  rendered.should contain("User search")
end

哪个适用于这个规范——但它适用于其他规范吗？