rails + rspec:测试验证时保持干燥状态

Question

好吧我说我有以下型号:

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

我正在为那些验证做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.有没有自动化这种东西的宝石或插件？我希望得到以下几点:

  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

值得注意的是:http://github.com/carlosbrando/remarkable

你能做到之后

it { should validate_presence_of :name }

Answer 2

如果你正在使用factory_girl,你可以这样做:

  it "should be invalid without a name" do
    FactoryGirl.build(:country, name: nil).should_not be_valid
  end

一个建议......不要在每个规范上使用关键字"should".相反,写道:"没有名字就无效"