Rspec的，工廠的女孩，after_initialize

我試圖測試這個after_initialize回調這對item模型（這HAS_MANY line_items）：Rspec的，工廠的女孩，after_initialize

after_initialize :build_default_items, unless: :line_items?

回調：

def build_default_items 
    LineOfBusiness.all.each do |lob| 
     line_items.new(line_of_business_id: lob.id) 
    end 
    end

我的測試看起來像：

describe 'callbacks' do 
    let(:user) { create :user } 
    it 'should build default items' do 

     lob1 = LineOfBusiness.create(id:1, name: "Name1", eff_date: Date.today,exp_date: Date.tomorrow, create_user: user, update_user: user) 
     lob2 = LineOfBusiness.create(id:2, name: "Name2", eff_date: Date.today,exp_date: Date.tomorrow, create_user: user, update_user: user) 

     lob_count = LineOfBusiness.all.count # this is correct as 2 

     item = build :item 

     expect(item.line_items.count).to eq(lob_count) 
    end 
    end

錯誤消息如下：

expected: 2 
    got: 0 

(compared using ==)

所以其回調方法失敗，它看到LineOfBusiness.all爲Nil

def build_default_items 
    LineOfBusiness.all.each do |lob| # <-- this is Nil so fails 
     line_items.new(line_of_business_id: lob.id) 
    end 
    end

任何想法，爲什麼它的無回調方法？

來源

2015-11-16 user3437721

如果'LineOfBusiness'爲空，則'LineOfBusiness.all'將給予'[]'，而非'nil'和'each'循環不應該得到重複。 –

循環沒有迭代，但爲什麼LineOfBusiness是空的？你是正確的，因爲該循環沒有迭代，但是如果將其更改爲'item = create：item'，那麼LineOfBusiness.all.count應該是2，就像在測試方法 – user3437721

中一樣，它有什麼區別嗎？ – Doon

line_items.count將觸發查詢到數據庫，並且因爲您不保存line_items在after_initialize回調，spec將失敗。請嘗試使用line_items.size。

expect(item.line_items.size).to eq(lob_count)

來源

2015-11-16 17:20:23

Rspec的，工廠的女孩，after_initialize

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