Rspec2 测试 before_validation 方法 [英] Rspec2 testing a before_validation method

问题描述

我有以下内容来删除特定属性上的空格.

I have the following to remove the spaces on a specific attribute.

#before_validation :strip_whitespace

protected
  def strip_whitespace
    self.title = self.title.strip
  end

我想测试一下.目前，我已经尝试过:

And I want to test it. For now, I've tried:

it "shouldn't create a new part with title beggining with space" do
   @part = Part.new(@attr.merge(:title => " Test"))
   @part.title.should.eql?("Test")
end

我错过了什么?

推荐答案

在保存对象或手动调用 valid? 之前，不会运行验证.您的 before_validation 回调没有在您当前的示例中运行，因为您的验证从未被检查过.在您的测试中，我建议您先运行 @part.valid?，然后再检查标题是否已更改为您期望的那样.

Validations won't run until the object is saved, or you invoke valid? manually. Your before_validation callback isn't being run in your current example because your validations are never checked. In your test I would suggest that you run @part.valid? before checking that the title is changed to what you expect it to be.

class Part < ActiveRecord::Base
  before_validation :strip_whitespace

protected
  def strip_whitespace
    self.title = self.title.strip
  end
end

spec/models/part_spec.rb

require 'spec_helper'

describe Part do
  it "should remove extra space when validated" do
    part = Part.new(:title => " Test")
    part.valid?
    part.title.should == "Test"
  end
end

当包含验证时会通过，当验证被注释掉时会失败.

This will pass when the validation is included, and fails when the validation is commented out.

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