How to write rspec for a model method in rails?

Question

Hi i have the following method in a my EnrolledAccount models for which i want to write rpec. My question is how can i create the association between Item and EnrolledAccount in rspec.

  def delete_account
    items = self.items
    item_array = items.blank? ? [] : items.collect {|i| i.id } 
    ItemShippingDetail.destroy_all(["item_id in (?)", item_array]) unless item_array.blank?
    ItemPaymentDetail.destroy_all(["item_id in (?)", item_array]) unless item_array.blank?
    Item.delete_all(["enrolled_account_id = ?", self.id])
    self.delete
  end

Answer 1

Generally you would use factory_girl to create a set of related objects in the database, against which you can test.

But, from your code I get the impression that your relations are not set up correctly. If you set up your relations, you can instruct rails what to do when deleting an item automatically.

Eg

class EnrolledAccount
  has_many :items, :dependent => :destroy
  has_many :item_shipping_details, :through => :items
  has_many :item_payment_details, :through => :items
end

class Item
  has_many :item_shipping_details, :dependent => :destroy
  has_many :item_payment_details, :dependent => :destroy
end

If your models are defined like that, the deletion will be automatically taken care of.

So instead of your delete_account you can just write something like:

account = EnrolledAccount.find(params[:id])
account.destroy

[EDIT] Using a gem like shoulda or remarkable, writing the spec is then also very easy:

describe EnrolledAccount do
  it { should have_many :items }
  it { should have_many :item_shipping_details }
end

Hope this helps.