Rspec控制器 - 當我運行單個測試時工作，但不是文件中的所有測試？

Question

如果我通過運行rspec spec/controllers/brands_controller_spec.rb來運行以下規範，則最後一次測試會失敗，告訴我用戶不在數據庫中的PG錯誤。但是，如果我單獨運行測試，它們都會通過，所以它看起來不像我的測試搞砸了，只是我缺少rspec的東西？

我每次更新用戶時都會創建一個活動，當用戶創建並登錄（Devise記錄登錄日期等）時會觸發該活動，從而創建活動。當我的測試日誌中的管理員用戶試圖創建與管理員用戶關聯的活動時，錯誤是說，即使我登錄用戶，我違反了PG規則，因爲用戶不在數據庫中。雖然它是？很困惑。

品牌控制器規格

describe 'GET #index' do 

    context 'unauthenticated_user' do 
     it "blocks an unauthenticated_user from getting to the index page" do 
      get :index 
      expect(response).to redirect_to new_user_session_path 
     end 
    end 

    context 'authenticated_user NOT admin' do 

     it "redirects non admin employees" do 
      login_user 
      get :index 
      expect(response).to redirect_to @user 
     end 
    end 

    context 'authenticated_user admin' do 

     it "renders the index template for the authenticated_user" do 
      login_admin 
      get :index 
      expect(response).to render_template :index 
     end 
    end     
end 

規格/支持/ controller_macros.rb

module ControllerMacros 
    def login_user 
     @request.env["devise.mapping"] = Devise.mappings[:user] 
     @user = FactoryGirl.create(:user) 
     sign_in @user 
    end 

    def login_admin 
     @request.env["devise.mapping"] = Devise.mappings[:user] 
     @admin_user = FactoryGirl.create(:admin) 
     sign_in @admin_user 
    end 
end 

錯誤：

1) BrandsController GET #index authenticated_user admin renders the index template for the authenticated_user 
    Failure/Error: Activity.create(user_id: user_id, trackable_id: self.id, trackable_type: self.class.name, action: "#{self.class.name} #{self.id} #{self.full_name} created") 


ActiveRecord::InvalidForeignKey: 
    PG::ForeignKeyViolation: ERROR: insert or update on table "activities" violates foreign key constraint "fk_rails_7e11bb717f" 
    DETAIL: Key (user_id)=(2185) is not present in table "users". 
    : INSERT INTO "activities" ("user_id", "trackable_id", "trackable_type", "action", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id" 
# ./app/models/user.rb:691:in `record_create' 
# ./spec/support/controller_macros.rb:10:in `login_admin' 
# ./spec/controllers/brands_controller_spec.rb:26:in `block (4 levels) in <top (required)>' 
# ------------------ 
# --- Caused by: --- 
# PG::ForeignKeyViolation: 
# ERROR: insert or update on table "activities" violates foreign key constraint "fk_rails_7e11bb717f" 
# DETAIL: Key (user_id)=(2185) is not present in table "users". 
# ./app/models/user.rb:691:in `record_create' 

編輯： 添加我發現用撬測試中另一個錯誤。

它似乎與PG阻止用戶創建在第二次測試中通過實際創建用戶。

ActiveRecord::StatementInvalid: 
    PG::InFailedSqlTransaction: ERROR:  
    current transaction is aborted, commands ignored until end of transaction block 
    : SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1 

編輯添加在數據庫清理東西：

config.before(:suite) do 
    DatabaseCleaner.strategy = :transaction 
    DatabaseCleaner.clean_with :truncation 
    end 

    config.around(:each) do |example| 
    DatabaseCleaner.cleaning do 
    example.run 
    end 
end 

config.after(:each) do 
    DatabaseCleaner.clean 
end 

Answer 1

嘗試改變策略，以:truncation。