Ruby on rails 如何使更新在rspec中失败？

我成功地为以下更新方法编写了测试：

  def update
    @user = User.find(params[:id])
    @user.update_attributes!(user_update_params)
    render :nothing => true
  end

  context "update user" do   
    it "should update a user based on valid info" do
      @factory = FactoryGirl.create(:user)
      put :update, :id => @factory.id, :user => {
         :name => 'sample_user', :user_name => 'sample_user',
         :email => 'sample@gmail.com', :email_confirmation => 'sample@gmail.com',
         :password => 'SamplePassword', :password_confirmation => 'SamplePassword',
         :bio => 'apple sauce', :picture_url => 'http://google.ca'
      }
      assert_equal "sample_user", assigns(:user).name
    end
    it "should not update a user based on invalid info" do
      @factory = FactoryGirl.create(:user)
      put :update, :id => @factory.id, :user => {
         :name => 'sample_user', :user_name => 'sample_user',
         :email => 'sample@gmail.com', :email_confirmation => 'sample@gmail.com',
         :password => 'SamplePassword', :password_confirmation => 'asdasdasd',
         :bio => 'apple sauce', :picture_url => 'http://google.ca'
      }
      assigns(:user).valid?.should == false
    end
  end

但我真的不知道如何写相反的东西。我的意思是我可以做

：password\u confirmation=>'asdasd'

，但当我尝试时-它表明我的密码确认与密码不匹配，然后测试失败0它应该通过-这可以在第二次测试中看到

---

有什么想法吗？测试应通过，但输入内容的有效性应为false。

首先，您不测试控制器规范中的任何验证。这就是模型规范的目的。测试关联和验证的一个好方法是使用gem

所以回到你的规格；看看你的

update

方法，我将规范写为：

首先编写快乐路径的示例（找到用户且参数有效）

处理在

DB

中找不到具有给定

id

的

用户

的情况

处理

用户

实例希望使用无效参数进行更新的情况

我通常关注具有指定属性的方法调用和实例变量的赋值

希望能有帮助

context "update user" do
  let(:user_id) { 63 }
  let(:user)    { FactoryGirl.create :user, id: user_id }

  context 'when success' do
    # simplified valid attributes hash
    let(:valid_attributes) { { :name => user_name } }
    let(:user_name) { 'sample_user' }

    it 'should find the user by id passed in params' do
      User.should_receive(:find).with(user_id).and_return(user)

      put :update, :id => user_id, :user => valid_attributes

      assigns(:user).should eq(user)
    end

    it "should update a user based on valid info" do
      put :update, :id => user_id, :user => valid_attributes

      expect(assigns(:user).name).to eq(user_name)
    end
  end

  context 'when failure' do
    let(:invalid_attributes) { {} }

    context 'when a user is not found' do
      let(:user_id) { nil }

      it 'raises ActiveRecord::RecordNotFound exception when no user is found'
        User.should_receive(:find).with(user_id).and_raise(ActiveRecord::RecordNotFound)

        put :update, :id => user_id, :user => invalid_attributes
      end
    end

    context 'when a user is found' do
      it "raises ActiveRecord::RecordInvalid exception when updated with invalid attributes" do
        User.any_instance.should_receive(:update_attributes!).with(invalid_attributes).and_raise(ActiveRecord::RecordInvalid)

        put :update, :id => user_id, :user => invalid_attributes
      end
    end
  end
end

---

您是否尝试获取记录并测试其当前属性？就像测试它是否仍然有默认属性并且没有正确更新一样

差不多

it "should not update a user based on invalid info" do
  @factory = FactoryGirl.create(:user)
  put :update, :id => @factory.id, :user => {
     :name => 'sample_user', :user_name => 'sample_user',
     :email => 'sample@gmail.com', :email_confirmation => 'sample@gmail.com',
     :password => 'SamplePassword', :password_confirmation => 'asdasdasd',
     :bio => 'apple sauce', :picture_url => 'http://google.ca'
  }
  User.first.name.should == 'the factory default name'
  User.first.name.should_not == 'sample_user'
end

---

我解决这个问题的方法是

it "should not update a user based on invalid info" do
  assert_raises(ActiveRecord::RecordInvalid) do
    @factory = FactoryGirl.create(:user)
    put :update, :id => @factory.id, :user => {
       :name => 'sample_user', :user_name => 'sample_user',
       :email => 'sample@gmail.com', :email_confirmation => 'sample@gmail.com',
       :password => 'SamplePassword', :password_confirmation => 'asdasdasd',
       :bio => 'apple sauce', :picture_url => 'http://google.ca'
    }
  end
end

---

这是因为-当密码不匹配时，我们无法向数据库提交数据。

如果您使用

更新\u属性异常将在出现错误时引发，所以您可以编写一个测试来检查是否引发了异常。（我不再使用RSpec，所以我不记得要使用的测试助手的名称）问题-它声明密码不匹配，因此永远不会涉及用户。第一个问题是-活动记录找不到id为零的记录