Question

我有一个简单的模型，其中付款属于贷款。我正在使用rspec和shoulda-matcher来测试验证。但是我一直收到指向未完成余额的错误 - 表明它是nil类的未定义方法。但是当我在rails控制台中使用模型时，这个验证工作正常。任何人都知道为什么它没有通过测试???

感谢。

class Payment < ActiveRecord::Base
  belongs_to :loan

  validates_presence_of :loan_id
  validate :proper_amount

  private

  def proper_amount
    errors.add(:amount, "proper") if amount > loan.outstanding_balance
  end
end

FactoryGirl.define do
  factory :payment do
    loan
    amount 100.0
    post_at Date.today
  end
end

FactoryGirl.define do
  factory :loan do
    funded_amount 5000.0
  end
end

RSpec.describe Payment do

  before (:all) do
    @loan = FactoryGirl.create(:loan)
    @payment = FactoryGirl.create(:payment, loan: @loan)
  end

  describe 'ActiveModel validations' do

    #basic validations on attributes
    it { should validate_presence_of(:loan_id) }
  end
end

Failure/Error: it { should validate_presence_of(:amount) }
NoMethodError:
  undefined method `outstanding_balance' for nil:NilClass

Answer 1

是否匹配器使用您未设置的主题。据我了解，RSpec将初始化一个。

RSpec.describe Payment do

  let!(:loan){ FactoryGirl.create(:loan) }
  subject!(:payment){ FactoryGirl.create(:payment, loan: loan) }

  describe 'ActiveModel validations' do

    #basic validations on attributes
    it { should validate_presence_of(:loan_id) }
  end
end

现在，您不需要使用@loan和@payment，而是需要在其他测试中使用贷款和付款。

使用自定义验证的Rsepc验证测试：未定义的方法和零类错误

1 个答案: