Question

我有一个ReturnItem课程。

规格：

require 'spec_helper'

describe ReturnItem do
  #is this enough?
  it { should respond_to :chosen }
  it { should respond_to :chosen= }

end

类：

class ReturnItem
  attr_accessor :chosen
end

因为几乎每个班级都使用attr_accessor，所以看起来有点单调乏味。在rspec中是否有一个快捷方式来测试getter和setter的默认功能？或者我是否必须单独和手动为每个属性完成测试getter和setter的过程？

Answer 1

我为此创建了一个自定义的rspec匹配器：

spec/custom/matchers/should_have_attr_accessor.rb

RSpec::Matchers.define :have_attr_accessor do |field|
  match do |object_instance|
    object_instance.respond_to?(field) &&
      object_instance.respond_to?("#{field}=")
  end

  failure_message_for_should do |object_instance|
    "expected attr_accessor for #{field} on #{object_instance}"
  end

  failure_message_for_should_not do |object_instance|
    "expected attr_accessor for #{field} not to be defined on #{object_instance}"
  end

  description do
    "checks to see if there is an attr accessor on the supplied object"
  end
end

然后在我的规范中，我这样使用它：

subject { described_class.new }
it { should have_attr_accessor(:foo) }

Answer 2

这是使用RSpec 3的上一个答案的更新版本，替换failure_message_for_should的{{1}}和failure_message的{{1}}：

failure_message_for_should_not

Ruby + Rspec：我应该如何测试attr_accessor？

2 个答案: