爲什麼這Rspec測試返回「電子郵件已經採取」

Question

這是我的規格文件，當添加測試的上下文「不可更新的用戶平衡」我得到下面的錯誤。

require 'spec_helper' 

describe Sale do 

    context 'after_commit' do 

    context 'assignable' do 
     sale = FactoryGirl.create(:sale, earned_cents: 10, assignable: true) 
     after { sale.run_callbacks(:commit) } 

     it 'updates user balance' do 
     sale.user.balance.should == sale.earned 
     end 
    end 

    context 'not assignable' do 
     sale = FactoryGirl.create(:sale, earned_cents: 10, assignable: false) 
     after { sale.run_callbacks(:commit) } 

     it 'does not updates user balance' do 
     sale.user.balance.should_not == sale.earned 
     end 
    end 

    end 
end 

而且工廠

require 'faker' 

FactoryGirl.define do 
    factory :user do 
    email Faker::Internet.email 
    password "mypassword" 
    end 

FactoryGirl.define do 
    factory :sale do 
    earned_cents 5 
    user 
    end 
end 

在/spec/spec_helper.rb我也有過這樣

require 'database_cleaner' 
RSpec.configure do |config| 
    config.before(:suite) do 
    DatabaseCleaner.strategy = :transaction 
    DatabaseCleaner.clean_with(:truncation) 
    end 

    config.before(:each) do 
    DatabaseCleaner.start 
    end 

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

這是我得到的錯誤。

`save!': Validation failed: Email has already been taken (ActiveRecord::RecordInvalid)

我猜它裏面Sale廠的user參考相關的，但我不知道爲什麼它不產生第二次測試新用戶或從數據庫中刪除。任何想法？

Answer 1

在用戶的工廠，試試這個來代替：

factory :user do 
    email { Faker::Internet.email } 
    password "mypassword" 
end