如何使用rspec和factory测试模型的方法 [英] how to test a method of models with rspec and factory

问题描述

我是Rails的新手，我必须使用'Rspec'，'shoulda'和'factory girl'宝石为现有的rails应用程序编写测试.我可以测试非特定的测试，例如validates_presence_of:带有'sholda'匹配器的测试.但是我想测试模型中的方法.我可以想象我需要做的事情，但我不能作文.

I'm newbie on rails and I have to write tests for existing rails apps with 'Rspec','shoulda' and 'factory girl' gems. I can test non specific tests like validates_presence_of: something with 'sholda' matchers. But I want to test methods which in models. I can visualize what I need to do, but I can't compose.

这是我正在谈论的示例:

This is an example what I'm talking about:

.
.
.
context 'is editable if project is not started' do
  setup do
    @brief=Factory(:brief)
    @started_project=Factory(:project_started, :brief => @brief)
    @brief_have_no_project=Factory(:brief)
  end
  specify "with editable brief" do
    @brief.brand_info = 'bla bla bla' #change brand info, this is impossible
    #i can't compose this section :S
  end
  specify "with non-editable brief" do

  end
end

.
.
.

我要测试的是这段代码中的简短可编辑内容.我该如何测试?

I want to test is brief editable in this code. How can I test it?

这是简短的模型代码:

class Brief < ActiveRecord::Base
  belongs_to :project
  validate :can_only_be_edited_if_project_is_not_started

  .
  .
  .

  def can_only_be_edited_if_project_is_not_started
    errors.add(:project_id, 'can_only_be_edited_if_project_is_not_started') if
      !project.nil? && !project.brief_can_be_edited?
  end

  .
  .
  .

end

如果我能找到一个起点，我将非常高兴.感谢帮助. :)

I will be very happy if I can find a starting point. Thanks for help. :)

失败:

1)如果项目不是以可编辑的摘要开始的，则摘要是可编辑的.

1) Brief is editable if project is not started with editable brief.

Failure/Error: @brief.brand_info = 'bla bla bla'
 NoMethodError:
   undefined method `brand_info=' for nil:NilClass
 # ./spec/models/brief_spec.rb:34:in `block (3 levels) in <top (required)>'

当尝试分配这样的值@ brief.brand_info ='bla bla bla'

when try to assign value like this @brief.brand_info = 'bla bla bla'

推荐答案

我自己找到了解决此问题的方法.

I found a solution for this problem by myself.

it "with editable brief (not started project)" do
  brief=Factory.build(:brief)
  Factory(:project, :brief => brief)
  brief.should have(0).error_on(:project_id)
end
it "with editable brief (nil project)" do
  brief=Factory.build(:brief)
  brief.brand_info="bla bla bla"
  brief.should have(0).error_on(:project_id)
end
it "with non-editable brief" do
  brief=Factory.build(:brief)
  Factory(:project_started, :brief => brief)
  brief.should have(1).error_on(:project_id)
end

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