Question

我正在学习rspec，想从“设计”中测试我的能力课程，这段代码：

class Ability
  include CanCan::Ability

  def initialize(user)

    @user = user || User.new

我目前的rspec看起来像这样：

require 'spec_helper.rb'

describe Ability do

  let(:user) { User.new }
  let(:ability) { Ability.new(user) }

  it 'should be an instance of Abiliy' do
    # expect(@user).to be_an_instance_of User # also works
    ability.should be_an_instance_of Ability
    # passes test
  end

  it "should include CanCan::Ability" do
    expect(:ability).to include(CanCan::Ability)
    # NoMethodError: undefined method `include?'
  end

  it 'should initialize with a User' do
   pending
  end

  it 'should have @user instance variable' do
    ability.user.should == User
    # NoMethodError: undefined method `user'

  end

有人可以提供一个例子。我做了一项研究但没有成功......

Answer 1

第一期=＆gt; include匹配器可以处理响应include?的任何对象（例如字符串或数组）

module M;end

class C
  include M
end

class D;end

C.new.include?(M)
NoMethodError: undefined method `include?' for #<C:0x2c5fa58>
     from (irb):10
     from C:/Ruby200/bin/irb:12:in `<main>'

C.include?(M)  #=>true
D.include?(M)  #=>false
C.respond_to?(:include?) #=>true
C.new.respond_to?(:include?) #=>false

Answer 2

如果你正在学习和玩耍，那么测试CanCan并没有什么坏处。但是，如果您正在处理项目，则不需要这些测试。

CanCan详细介绍了单元测试，特别是spec/cancan/ability_spec.rb。你所做的是以另一种方式复制Ryan的工作:)你也可以打开宝石，看看它是如何测试的。

对于使用CanCan，我的建议是测试控制器级别的集成效果，比如你不允许某些角色阅读，然后获取它并被拒绝，等等。

如果初始化，包含和类变量存在，则简单的rspec测试

2 个答案: