ruby-on-rails – Rspec – 如何在每次测试后清理数据库

require 'rails_helper'

feature 'Admin signs in' do

  background do
    FactoryGirl.create(:user)
  end

  scenario 'with valid credentials' do
    visit admin_root_path
    fill_in 'user_email',:with => 'email@email.com'
    fill_in 'user_password',:with => 'testpassword'
    click_button 'Sign in'
    expect(page).to have_content('Dashboard')
  end

  scenario 'with invalid credentials' do
    visit admin_root_path
    fill_in 'user_email',:with => 'wrongpassword'
    click_button 'Sign in'
    expect(page).to have_content('Admin Login')
  end

end

运行测试,我收到以下错误：

1) Admin signs in test with invalid credentials
 Failure/Error: FactoryGirl.create(:user)
 ActiveRecord::RecordInvalid:
   Validation failed: Email has already been taken

我认为DatabaseCleaner会恢复更改,但看起来用户记录在数据库中持续存在直到第二个场景块.

如何在第一个场景后确保清理数据库？

我在此post之后配置了数据库清理程序

# support/database_cleaner_spec.rb

RSpec.configure do |config|
  config.before(:suite) do
    DatabaseCleaner.clean_with(:truncation)
  end

  config.before(:each) do
    DatabaseCleaner.strategy = :transaction
  end

  config.before(:each,:js => true) do
    DatabaseCleaner.strategy = :truncation
  end

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

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

end

我还更新了规范帮助文件：

config.use_transactional_fixtures = false