ruby-on-rails - 如何为空白字段编写 rspec？ [Rails3.1]

Question

我使用 rails 3.1 + rspec 和 factory girl。

我对必填字段 (validates_presence_of) 的验证工作正常。我如何让测试将该事实用作“成功”而不是“失败”
规范是:

describe "Add an industry with no name" do
  context "Unable to create a record when the name is blank" do
    subject do
      ind = Factory.create(:industry_name_blank)
    end
    it { should be_invalid }
  end
end

但是我失败了:

Failures:

  1) Add an industry with no name Unable to create a record when the name is blank 
     Failure/Error: ind = Factory.create(:industry_name_blank)
     ActiveRecord::RecordInvalid:
       Validation failed: Name can't be blank
     # ./spec/models/industry_spec.rb:45:in `block (3 levels) in <top (required)>'
     # ./spec/models/industry_spec.rb:47:in `block (3 levels) in <top (required)>'

Finished in 0.20855 seconds
8 examples, 1 failure

模型代码:

class Industry < ActiveRecord::Base
  validates_presence_of :name
  validates_uniqueness_of :name
end

工厂代码:

Factory.define :industry_name_blank, :class => 'industry' do |industry|
  industry.name   { nil }
end

Answer 1

这是一个例子......按照惯例，主题被填充为“Industry.new”

describe Industry do

  it "should have an error on name when blank" do
    subject.name.should be_blank
    subject.valid?
    subject.should have(1).error_on(:name)
    #subject.errors.on(:name).should == "is required"
  end

end

最后一个有点脆，但你可以做到

关于语法的更多信息:http://cheat.errtheblog.com/s/rspec/