ruby-on-rails - rails + rspec : Staying DRY when testing validations

Question

好的说我有以下模型:

class Country < ActiveRecord::Base
  validates_presence_of :name
  validates_presence_of :code
end

我正在为这些验证做 rspec 单元测试。它们看起来像这样:

  it "should be invalid without a name" do
    country = Country.new(@valid_attributes.except(:name))
    country.should_not be_valid
    country.errors.on(:name).should == "can't be blank"
    country.name = @valid_attributes[:name]
    country.should be_valid
  end

  it "should be invalid without a code" do
    country = Country.new(@valid_attributes.except(:code))
    country.should_not be_valid
    country.errors.on(:code).should == "can't be blank"
    country.code = @valid_attributes[:code]
    country.should be_valid
  end

这看起来不太干。是否有任何 gem 或插件可以自动执行此类操作？
我想得到一些东西:

  it "should be invalid without a name" do
    test_presence_validation :name
  end

  it "should be invalid without a code" do
    test_presence_validation :code
  end

Answer 1

值得一提的是:http://github.com/carlosbrando/remarkable

在你可以做之后

it { should validate_presence_of :name }