Question

这是我的控制器测试（“spec / controllers / api / tasks_controller_spec.rb”）

require 'spec_helper'

describe Api::TasksController do
    before :each do
        @quadros = create :cat
        @task = Task.new(:content => "Example task for #api")
        @quadros.add_task(@task)
    end

    describe "GET index" do
        it "returns a list of all user's tasks" do
            get :index, :format => 'json'
            expect(response).to eq(User.first.all_tasks)
        end 
    end
end

这是我的Api :: BaseController

class Api::BaseController < ApplicationController
    respond_to :json
    skip_before_filter :authenticate_user!
end

和Api :: TasksController

class Api::TasksController < Api::BaseController
    def index
        @tasks = User.first.all_tasks
        respond_with @tasks.to_json
    end
end

我的其他测试运行正常。

当我运行api测试时，它执行before块，将请求作为json，然后挂起这个查询：

Processing by Api::TasksController#index as JSON
  User Load (0.3ms)  SELECT `users`.* FROM `users` LIMIT 1
  Tag Load (0.3ms)  SELECT `tags`.* FROM `tags` WHERE (user_id = 418 AND parent_tag_id IS NOT NULL)
  Tag Load (0.2ms)  SELECT `tags`.* FROM `tags` WHERE `tags`.`id` IN (NULL)
  Tag Load (0.3ms)  SELECT `tags`.* FROM `tags` WHERE (user_id = 418 AND parent_tag_id IS NULL)
  Task Load (0.7ms)  SELECT tasks.* FROM `tasks` JOIN tag_tasks on tasks.id = tag_tasks.task_id WHERE (tag_tasks.tag_id IN (301) OR creator_id = 418) GROUP BY tasks.id ORDER BY tasks.created_at DESC
Completed 200 OK in 99ms (Views: 0.1ms | ActiveRecord: 0.0ms)
  User Load (0.3ms)  SELECT `users`.* FROM `users` LIMIT 1
  Tag Load (0.2ms)  SELECT `tags`.* FROM `tags` WHERE (user_id = 418 AND parent_tag_id IS NOT NULL)
  Tag Load (0.2ms)  SELECT `tags`.* FROM `tags` WHERE `tags`.`id` IN (NULL)
  Tag Load (0.2ms)  SELECT `tags`.* FROM `tags` WHERE (user_id = 418 AND parent_tag_id IS NULL)
  Task Load (0.7ms)  SELECT tasks.* FROM `tasks` JOIN tag_tasks on tasks.id = tag_tasks.task_id WHERE (tag_tasks.tag_id IN (301) OR creator_id = 418) GROUP BY tasks.id ORDER BY tasks.created_at DESC

它将永远坐在哪里。

为什么会发生这种情况的任何想法？

Answer 1

我遇到了类似的问题，看来问题出在您的预期线上：

expect(response).to eq(User.first.all_tasks)

这不是RSpec希望您测试响应体的方式。请注意，in the docs使用了专门的匹配器而不是等号匹配器：

expect(response).to render_template("index")

因此，response对象（ActionController::TestResponse）的目的是查询发生了什么，而不是响应正文。所以你的测试应该是这样的：

expect(JSON.parse(response.body)).to eq(User.first.all_tasks)

（请注意，响应正文是一个字符串。）

关于为什么测试挂起而不是完全失败的解释 - 看来这个代码块（lib/rspec/expectations/fail_with.rb:22 gem版本2.14.0中的rspec-expectations）是罪魁祸首：

if actual && expected
  if all_strings?(actual, expected)
    if any_multiline_strings?(actual, expected)
      message << "\nDiff:" << differ.diff_as_string(coerce_to_string(actual), coerce_to_string(expected))
    end
  elsif no_procs?(actual, expected) && no_numbers?(actual, expected)
    message << "\nDiff:" << differ.diff_as_object(actual, expected)
  end
end

all_strings?，any_multiline_strings?，no_procs?和no_numbers?方法（在同一文件中定义）都会在args.flatten上调用[actual, expected]。在这种情况下，我可以告诉问题的是actual是TestResponse，这导致flatten方法本身挂起而不会引发运行时错误。我没有时间进一步调查此问题，但Array.flatten的来源是here，如果有人有兴趣的话。

Rspec控制器测试挂

1 个答案: