Mocha测试异步功能 [英] Mocha tests for asynchronous functions

问题描述

我正在编写一个节点包装程序，以便与外部api 进行交互，并且很难测试异步createJob方法.下面是测试用例代码:

I'm writing a node wrapper to interact with an external api and am having a difficult time testing the asynchronous createJob method. Below is the test case code:

api_key = "test_0dc8d51e0acffcb1880e0f19c79b2f5b0cc"

lob     = require('../src/lob')(api_key)
should  = require("should")
chai    = require("chai")

data = 
  name: "test name"
  to: "Bob"
  from: "Alice"
  object1: "foo"
  object2: "bar"

describe "Job", ->
  @timeout(50000)
  describe "create", ->
    it "should create a job with address_id", (done) ->
      lob.jobs.createJob data, (new_job) ->
        new_job.should.not.be.empty
        new_job['name'].should.equal(data['name'])
        done()

修改

上面的代码解决了这个问题

The above code resolves the issue

推荐答案

(coffeescript中的答案.如果要将咖啡转换为js，请使用

(Answer in coffeescript. If you'd like to convert coffee to js use http://coffeescript.org/, then the Try CoffeeScript tab.)

如果要测试异步代码，则需要使用done模式:

If you're testing asynch code you'll need to use the done pattern:

describe "User", ->
  describe "#save()", ->
    it "should save without error", (done) ->
      user = new User("Luna")
      user.save done

http://visionmedia.github.io/mocha/在异步代码"下.看起来createJob返回的是true，因为测试正在压缩代码以发送帖子等，然后说是的，我按照您的要求发送了所有内容！".

http://visionmedia.github.io/mocha/ under "Asynchronous code". Looks like createJob is returning true because the test is zipping through the code to send the post etc. and saying "yep, I sent all that stuff like you asked!".

我建议马丁·福勒(Martin Fowler)的有关使用Mocha测试异步js代码的文章: http://martinfowler. com/articles/asyncJS.html .

I'd recommend Martin Fowler's article on testing asynch js code with mocha: http://martinfowler.com/articles/asyncJS.html.

我有一大堆代码可以测试从数据库中检索用户(使用sinon进行存根).实际代码连接到数据库，然后使用用户的配置调用onSuccess:onSuccess(config)

I've got a chunk of code that tests retrieval of a user from the database (using sinon for stubbing). The real code connects to the db then calls the onSuccess with the user's configuration: onSuccess(config)

  describe 'Config', ->
    orgId = 'a'
    errorHandler = ((msg) -> (throw msg))
    beforeEach ->
      readConfig = sinon.stub(sdl , 'getConfig')
      readConfig.callsArgOnWithAsync(2, configSource, JSON.parse(jsonConfig))
    afterEach ->
      configSource.getConfig.restore()

...稍后

  configSource.getConfig('520bc323de4b6f7845543288', errorHandler, (config) ->
      config.should.not.be.null
      config.should.have.property('preferences')
      done()
  )

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