Question

我在使用Rspec测试时遇到了一种非常奇怪的行为。

我有以下测试来证明问题：

require 'spec_helper'

describe "RESTful API" do

  describe "Listing Entities" do

    context 'With valid Token' do

      before do
        entries = create_list(:entry, 10)
        admin   = create(:admin) 
        get api_entries_path, {token: admin.api_key.token}        
      end


      it 'Shows a list of entries' do     
        puts JSON.parse(response.body)
      end

      it "Should show no entries when the user has no data" do          
        puts JSON.parse(response.body) 
      end

    end

  end
end

非常奇怪的行为是我得到两个不同的输出，而我应该有完全相同的响应。我得到以下内容：

{"entries"=>[{"id"=>1, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}, {"id"=>2, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}, {"id"=>3, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}, {"id"=>4, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}, {"id"=>5, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}, {"id"=>6, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}, {"id"=>7, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}, {"id"=>8, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}, {"id"=>9, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}, {"id"=>10, "user_id"=>1, "username"=>"admin", "distance"=>50.0, "time_period"=>60, "date_time"=>"2014-05-15 03:36:11 +0300", "created_at"=>"2014-05-15T01:54:40.000Z", "distance_type"=>"Km"}], "total_count"=>10}

{"entries"=>[], "total_count"=>0}

如你所见，我有两种不同的输出。

对于User和ApiKey模型：

# Controller 

class Api::V1::EntriesController < Api::V1::BaseController

  def index
    @entries = @current_user.entries    
  end

end


class User < ActiveRecord::Base

  # relationships 
  has_many :entries
  has_one :api_key, dependent: :destroy

  # Generate API Key to be useed with the API
  after_create :create_api_key

  private

  def create_api_key
    ApiKey.create!(:user_id => self.id)
  end  

end

class ApiKey < ActiveRecord::Base
    belongs_to :user

    before_create :generate_token

    private

    def generate_token
      begin
        self.token = SecureRandom.hex.to_s
      end while self.class.exists?(token: token)
    end 
end

请注意我的DatabaseCleaner如下：

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

请注意我使用的是ruby（2.0），rails（4.0.4）和rspec-rails（2.14.2）。我正在使用OS X 10.7。

任何帮助将不胜感激。

Answer 1

经过几个小时的挣扎后，事实证明我必须改变：

DatabaseCleaner.strategy = :transaction

到：

DatabaseCleaner.strategy = : truncation

截断正在将id重置为0（井1），而事务不是，我在工厂使用硬编码ID。

感谢你的帮助Jon Rowe。

来自Rspec Rails的奇怪行为（同一测试的不同输出）

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