ruby-on-rails - RSpec with Factory_girl - 销毁对象

Question

我不想测试两个模型之间的关系。A course has many enrollments, an enrollment has one course.
当类(class)被销毁时，与其相关的所有注册都将设置为 active = false .这适用于真实物体，我只是无法让测试工作，因为无论我做什么，类(class)都不会被破坏。

describe Enrollment do
  it "deactivates enrollment" do
    course = create(:a_course)
    user = create_user
    enrollment = build(:enrollment)
    enrollment.course = course
    enrollment.user = user
    enrollment.save

    # until now everything works as expected

    expect { course.destroy }.to change { enrollment.active }.to be_false

    # the course isn't being destroyed when calling course.destroy

  end
end

我在 factory_girl 文档中找不到任何关于销毁 factory_girl 对象的信息，也许我做错了，我应该使用“真实”对象？谢谢!

更新
这是发生变化的模型

class Course < ActiveRecord::Base
  attr_accessible ...

  has_many :users, through: :enrollments
  has_many :enrollments

  before_destroy :deactivate_enrollments

  protected

  def deactivate_enrollments
    enrollments = self.enrollments

    enrollments.each do |e|
      e.active = false
      e.save
    end
  end
end

由于我对此不太确定，因此我用来测试的类(class)是 factory_girl 对象。它不是这样创建的: Course.create... . factory_girl 对象是否与 ActiveRecord 对象具有相同的方法？

这是 factory_girl代码:

FactoryGirl.define do
  factory :course, class: Course do
    titel "Course title"
  end
end

更新 2
这是 failure message

Enrollment
  deactivates enrolment (FAILED - 1)

Failures:

  1) Enrollment deactivates enrollment
     Failure/Error: expect { course.destroy }.to change(enrollment, :active).from(true).to(false)
       active should have been changed to false, but is now true
     # ./spec/models/enrollment_spec.rb:18:in `block (2 levels) in <top (required)>'

更新 3

事实证明，类(class)并没有被破坏。都没有 Course.destroy_all或 course.destroy作品。无论我是否创建类(class)并注册 factory_girl。怎么会这样？

Answer 1

更新

我注意到您通过重新加载注册回答了您自己的问题，但即便如此，我认为您应该更改 rspec 语法以使其更具可读性和表现力。最终结果可能是:

expect { 
  course.destroy
  enrollment.reload
}.to change(enrollment, :active).from(true).to(false)

我认为这将是记录代码行为的更好方法，因为它读起来几乎像流利的英语；)