如何在RSpec中测试此代码？

Question

这是在Ruby on Rails 3.2.2中仅通过ajax调用的方法

def some_ajax_action
    @user = User.find_by_id(params[:id])
    @user_list = User.find_all_by_parent_id(params[:id])
    respond_to do |format|
      format.js
    end
  end

我想知道用RSpec测试它是否必要（或可能）？有什么想法吗？

Answer 1

怎么样：

before do
  User.stub(:find_by_id)
  User.stub(:find_all_by_parent)
end

it "finds the user" do
  User.should_receive(:find_by_id).with("37")
  xhr <HTTP VERB>, :some_ajax_action, :id => "37"
end

it "finds the user list" do
  User.should_receive(:find_all_by_parent).with("37")
  xhr <HTTP VERB>, :some_ajax_action, :id => "37"
end

将<HTTP VERB>替换为routes.rb中针对这些ajax调用的内容，例如如果你有

get 'some_ajax_action'

然后第一个是xhr :get, :some_ajax_action, :id => "37"。