Rspec - 每次测试后如何清理数据库

Question

我有一个功能规格与Capybara的登录页面,我正在使用FactoryGirl + DatabaseCleaner

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 => 'email@email.com'
    fill_in 'user_password', :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？

我在此帖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

Answer 1

我错误地认为spec/support文件夹中的配置文件是自动加载的,但事实证明我必须取消注释spec/rails_helper.rb中的以下行

Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f }

DatabaseCleaner配置文件是正确的,它根本没有加载.

Answer 2

确保在 spec/rails_helper.rb 中有以下配置

RSpec.configure do |config|
 config.use_transactional_fixtures = true
end

这个想法是从一个干净的数据库开始每个示例，创建该示例所需的任何数据，然后通过在示例结束时简单地回滚事务来删除该数据。