Question

鉴于我有以下课程

class listing > ActiveRecord::Base
  attr_accessible :address
  belongs_to :owner

  validates :owner_id, presence: true
  validates :address, presence: true
end

在我/spec/models/listing_spec.rb的测试中保存列表之前，有没有办法让我无法与所有者保持关联，而无需通过批量分配来访问owner_id？

describe Listing do
  before(:each) do
    @owner = Factory :owner
    @valid_attr = {
      address: 'An address',
    }
  end

  it "should create a new instance given valid attributes" do
    listing = Listing.new @valid_attr
    listing.owner = @owner
    listing.save!
  end

  it "should require an address" do
    listing = Listing.new @valid_attr.merge(:address => "")
    listing.owner = @owner
    listing.should_not be_valid
  end
end

Answer 1

不需要使用工厂女孩（除非你想......）：

let(:valid_attributes) { address: 'An Address', owner_id: 5}

it "creates a new instance with valid attributes" do
  listing = Listing.new(valid_attributes)
  listing.should be_valid
end

it "requires an address" do
  listing = Listing.new(valid_attributes.except(:address))
  listing.should_not be_valid
  listing.errors(:address).should include("must be present")
end

it "requires an owner_id" do
  listing = Listing.new(valid_attributes.except(:owner_id))
  listing.should_not be_valid
  listing.errors(:owner_id).should include("must be present")
end

Answer 2

如果您使用factory-girl

  # it's probably not a good idea to use FG in the first one
  it "should create a new instance given valid attributes" do
    listing = Listing.new @valid_attr
    listing.owner = @owner
    listing.property_type = Factory(:property_type)
    listing.save!
  end

  it "should require an address" do
    # But here you can use it fine
    listing = Factory.build :listing, address: ''
    listing.should_not be_valid
  end

  it "should require a reasonable short address" do
    listing = Factory.build :listing, address: 'a'*245
    listing.should_not be_valid
  end

Answer 3

我不想在这里成为异议的代言人，但你不应该在验证规范中调用save!或valid? 。 10次中有9次，如果你需要使用工厂女孩来检查你的模型的有效性，那就是非常错误的。你应该做的是检查每个属性的错误。

编写上述内容的更好方法是：

describe Listing do
  describe "when first created" do
    it { should have(1).error_on(:address) }
    it { should have(1).error_on(:owner_id) }
  end
end

此外，您可能不希望检查地址的状态，您要检查它是否为空，而不是空字符串，并且它不再是超过一定的长度。您需要使用validates_length_of。

有没有办法防止必须在测试中指定关联？

3 个答案: