rspec - 如何使用 rspec-rails 3.0.0 和 shoulda-matchers 2.5.0 测试条件验证

Question

我正在使用 rspec-rails 3.0.0 和 shoulda-matchers 2.5.0 运行 Rails 4 应用程序，并且我有一个事件模型，它具有一些条件验证，如下所示:

class Event < ActiveRecord::Base
  validates :name, :location, :time, :city, :zipcode, :user, :state, presence: true
  validates :post_text, presence: true, if: :happened?
  validates :pre_text, presence: true, unless: :happened?

  belongs_to :community
  belongs_to :user
  belongs_to :state

  def happened?
    (self.time < Time.now) ? true : false
  end
end

我的 event_spec.rb 看起来像:

require 'spec_helper'

describe Event do
  before { @event = FactoryGirl.build(:future_event) }

  subject { @event }

  it { should validate_presence_of(:time) }
  it { should validate_presence_of(:name) }
  it { should validate_presence_of(:location) }
  it { should validate_presence_of(:user) }
  it { should validate_presence_of(:city) }
  it { should validate_presence_of(:state) }
  it { should validate_presence_of(:zipcode) }

  it { should belong_to(:state) }
  it { should belong_to(:user) }

  it 'has pre_text if future event' do
     expect(FactoryGirl.create(:future_event)).to be_valid
  end

  it 'has post_text if past event' do
    expect(FactoryGirl.create(:past_event)).to be_valid
  end
end

但是当我运行测试时，我的 it { should validate_presence_of(:time) }块失败，因为它继续运行剩余的验证并在条件验证上抛出异常，因为 self.time 为零。我已经通过检查 time.present 对此实现了一个hacky修复？在发生什么？方法。但是谁能帮助我了解测试需要另一个字段存在的条件验证的最佳方法是什么？

Answer 1

这肯定来晚了，但对于其他正在寻找解决方案的人来说。我找到了一种有效的方法:

context "if happened" do
  before { allow(subject).to receive(:happened?).and_return(true) }
  it { is_expected.to validate_presence_of(:time) }
end

我希望这有帮助