RSpec 数据库清理器在测试之间没有发生

Question

我有一系列相当复杂的测试，以更简单的形式复制如下：

# Credit cards that should succeed; totally opening to other ways of running this loop, if it's what's causing the error! It's just the only thing I thought of to be DRY
["2134", "1234"].each do |card|
  describe "enter card number", job: true do
    before do
      fill_in "card_number", with: card
    end

    it "should create a record" do
      Record.count.should == 1
    end
  end
end

# Credit card that should fail
# Just the one number here
  describe "enter card number" do
    before do
      fill_in "card_number", with: "5678"
    end

    it "should create a record" do
      Record.count.should == 0
    end
  end

在配置中，我需要关闭 use_transactional_fixtures，因为这些是基于 javascript 的测试，而事务性装置对我不起作用。所以我尝试像这样实现数据库清理器（使用 Sucker Punch gem 指令https://github.com/brandonhilkert/sucker_punch，因为我最终还需要测试 gem）：

  # Database cleaner set up below
  config.before(:each) do
    DatabaseCleaner.strategy = :transaction
  end

  # Clean up all jobs specs with truncation
  config.before(:each, job: true) do
    DatabaseCleaner.strategy = :truncation
  end

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

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

问题是这没有帮助：

• 对于应该成功的信用卡（每个循环），第一次通过，但随后都失败，因为 Record.count 不断构建
• 对于应该失败的信用卡，它失败是因为在运行测试时，测试数据库中已经有Records

基本上，它通过的唯一方法是在 before(:all) 中强制清理（before 和 after 都没有成功）

 # Credit cards that should succeed
    ["2134", "1234"].each do |card|
      describe "enter card number", job: true do

        before(:all) do
          Record.destroy_all
        end

        before do
          # did not work to put the destroy here 
          fill_in "card_number", with: card
        end

        it "should create a record" do
          Record.count.should == 1
        end

        # did not work to put the destroy here 
        # after do
        #  Record.destroy_all
        # end
      end
    end

# Credit card that should fail
  describe "enter card number" do
    before do
      # On this one, the Record.destroy_all could have gone anywhere
      Record.destroy_all 
      fill_in "card_number", with: "5678"
    end

    it "should create a record" do
      Record.count.should == 0
    end
  end

如何正确设置数据库清理程序？或者我只是应该做before(:all)？

Answer 1

首先，您使用的是哪个版本的database_cleaner？

如果你查看 gem 的文档，你会看到一些不同的东西：

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

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

另外，我不确定这是否会按您的预期工作：

   ["2134", "1234"].each do |card|
      describe "enter card number", job: true do
        ...
      end
    end

我会找到一种不同的方法来测试这两种情况。真的有必要这样输入两个数字吗？