无法使用 rspec 控制器 POST 创建操作进行测试（设计和 cancan）

Question

我很难让控制器通过 rspec 测试。我想测试 POST 创建操作是否有效。我正在使用 rails (3.0.3)、cancan (1.4.1)、devise (1.1.5)、rspec (2.3.0)

模型非常简单

class Account < ActiveRecord::Base
  attr_accessible :name 
end

控制器也是标准的（直接从脚手架出来）

class AccountsController < ApplicationController
  before_filter :authenticate_user!, :except => [:show, :index]
  load_and_authorize_resource
  ...

  def create
    @account = Account.new(params[:account])

    respond_to do |format|
      if @account.save
        format.html { redirect_to(@account, :notice => 'Account was successfully created.') }
        format.xml  { render :xml => @account, :status => :created, :location => @account }
      else
        format.html { render :action => "new" }
        format.xml  { render :xml => @account.errors, :status => :unprocessable_entity }
      end
    end
  end

我想通过的 rspec 测试是（请原谅标题，也许不是最合适的）

 it "should call create on account when POST create is called" do
   @user = Factory.create(:user)
   @user.admin = true
   @user.save

   sign_in @user #this is an admin
   post :create, :account => {"name" => "Jimmy Johnes"}
   response.should be_success
   sign_out @user

 end

然而我得到的只是

AccountsController get index should call create on account when POST create is called
 Failure/Error: response.should be_success
 expected success? to return true, got false
 # ./spec/controllers/accounts_controller_spec.rb:46

可以测试其他操作并通过（即 GET new）

这里是 GET new 的测试

it "should allow logged in admin to call new on account controller" do
  @user = Factory.create(:user)
  @user.admin=true
  @user.save

  sign_in @user #this is an admin
  get :new
  response.should be_success
  sign_out @user
end

这里是技能文件

class Ability
  include CanCan::Ability

  def initialize(user)
    user ||= User.new
    if user.admin?
      can :manage, :all
    else
      can :read, :all
    end
  end
end

有什么想法吗？我的猜测是我使用了错误的 rspec 期望，因为代码确实有效（只是测试没有按预期执行！）

Answer 1

response.should be_success 如果响应代码在 200-299 范围内，则返回 true。但是创建操作重定向，所以响应代码被设置为 302，因此失败。

您可以使用response.should redirect_to 对此进行测试。查看标准 RSpec 控制器生成器的输出示例，可能如下所示：

  it "redirects to the created account" do
    Account.stub(:new) { mock_account(:save => true) }
    post :create, :account => {}
    response.should redirect_to(account_url(mock_account))
  end

Answer 2

使测试通过的 rspec 测试是（感谢 zetetic 的建议）：

    it "should call create on account when POST create is called" do
    @user = Factory.create(:user)
    @user.admin = true
    @user.save

    sign_in @user #this is an admin
    account = mock_model(Account, :attributes= => true, :save => true) 
    Account.stub(:new) { account }

    post :create, :account => {}
    response.should redirect_to(account_path(account))
    sign_out @user

end