如何测试自定义验证器? [英] How to test a custom validator?

问题描述

我有以下验证器:

# Source: http://guides.rubyonrails.org/active_record_validations_callbacks.html#custom-validators
# app/validators/email_validator.rb

class EmailValidator < ActiveModel::EachValidator
  def validate_each(object, attribute, value)
    unless value =~ /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i
      object.errors[attribute] << (options[:message] || "is not formatted properly") 
    end
  end
end

我希望能够在我的 lib 目录中的 RSpec 中对此进行测试.到目前为止的问题是我不确定如何初始化 EachValidator.

I would like to be able to test this in RSpec inside of my lib directory. The problem so far is I am not sure how to initialize an EachValidator.

推荐答案

这是我为该文件编写的快速规范，它运行良好.我认为可能会清理存根，但希望这足以让您开始.

Here's a quick spec I knocked up for that file and it works well. I think the stubbing could probably be cleaned up, but hopefully this will be enough to get you started.

require 'spec_helper'

describe 'EmailValidator' do

  before(:each) do
    @validator = EmailValidator.new({:attributes => {}})
    @mock = mock('model')
    @mock.stub('errors').and_return([])
    @mock.errors.stub('[]').and_return({})
    @mock.errors[].stub('<<')
  end

  it 'should validate valid address' do
    @mock.should_not_receive('errors')    
    @validator.validate_each(@mock, 'email', '[e-mail]')
  end

  it 'should validate invalid address' do
    @mock.errors[].should_receive('<<')
    @validator.validate_each(@mock, 'email', 'notvalid')
  end  
end

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