ruby-on-rails - 在 RSpec/Rails 中测试数组的预期顺序

Question

在 RSpec 规范文件中我有以下测试

it 'should return 5 players with ratings closest to the current_users rating' do
  matched_players = User.find(:all, 
                              :select => ["*,(abs(rating - current_user.rating)) as player_rating"], 
                              :order => "player_rating", 
                              :limit => 5)

  # test that matched_players array returns what it is suppose to 
end

我将如何完成此测试以测试 matched_players 是否返回正确的用户。

Answer 1

我认为您应该首先将一些测试用户引入测试数据库(例如使用工厂)，然后查看测试是否返回正确的用户。

此外，在您的模型中有一个方法可以返回匹配的用户会更有意义。

例如:

describe "Player matching" do
  before(:each) do
    @user1 = FactoryGirl.create(:user, :rating => 5)
    ...
    @user7 = FactoryGirl.create(:user, :rating => 3)
  end

  it 'should return 5 players with ratings closest to the current_users rating' do
    matched_players = User.matched_players
    matched_players.should eql [@user1,@user3,@user4,@user5,@user6]
  end
end