Jasmine打开和关闭Db连接

Question

我有多个带有单元测试的文件。我不想跟他们搭讪。我需要关闭猫鼬连接，以便gulp-jasmine到出口。我还想避免将连接处理放在it块中，因为它不属于那里。

如果我将连接/断开函数移动到beforeAll和afterAll。

代码

单元试验

describe "a unit test"
  beforeAll (done)->
    db = testSettings.connectDB (err)->
      throw err if err?
      done()

  ...

  afterAll (done)->
    testSettings.disconnectDB (err)->
      throw err if err?
      done()

然后Jasmine执行next describes beforeAll，然后afterAll才能正确断开数据库连接。

(茉莉花博士)撕下来]

但是，要小心使用beforeAll和afterAll！由于它们没有在规范之间重置，因此很容易意外地在您的规范之间泄漏状态，从而导致它们错误地通过或失败。

连接函数

connections = 0

exports.connectDB = (callback) ->
  configDB = require(applicationDir + 'backend/config/database.js')(environment)

  if connections == 0
    mongoose.connect configDB.url,{auth:{authdb:configDB.authdb}}, (err)->
      if (err)
        console.log(err)
        return callback err

    db = mongoose.connection
    db.on 'error', console.error.bind(console, 'connection error:')

    db.once 'open', () ->
      connections++
      return callback null, db
      #console.log "Database established"
      #Delete all data and seed new data

  else
    db = mongoose.connection
    return callback null, db

exports.disconnectDB = (callback) ->
  mongoose.disconnect (err)->
    return callback err if err?
    connections--
    return callback()

编辑：

侦听断开事件也不起作用: exports.disconnectDB =(回调) -> console.log“断开DB"，mongoose.connection.readyState mongoose.disconnect ( err )->返回回调错误(如果是错误的话？)连接-- console.log“应该是DISCONNETCED"，mongoose.connection.readyState #并不是因为状态为3 0>断开了返回回调()

mongoose.connection‘断开连接’，() -> console.log "DIS"，mongoose.connection.readyState返回回调()

错误

{ Error: Trying to open unclosed connection.

问题

如何正确打开和关闭与gulp-jasmine的连接

Answer 1

这似乎很有效，但我仍然想知道为什么我不能使用disconnected事件：

connections = 0
disConnectionRetries = 0
MAX_DISCONNECTION_RETRIES = 10

connectDB = (callback) ->
  console.log "CONNECTING TO DB", mongoose.connection.connectionState
  configDB = require(applicationDir + 'backend/config/database.js')(environment)

  if connections == 0
    mongoose.connect configDB.url,{auth:{authdb:configDB.authdb}}, (err)->
      if (err)
        console.log(err)
        return callback err

    db = mongoose.connection
    db.on 'error', console.error.bind(console, 'connection error:')

    db.once 'open', () ->
      connectionRetries = 0
      connections++
      return callback null, db
      #console.log "Database established"
      #Delete all data and seed new data

  else
    db = mongoose.connection
    return callback null, db

exports.disconnectDB = (callback) ->
  console.log "DISCONNECTING FROM DB", mongoose.connection.readyState
  mongoose.disconnect (err)->
    return callback err if err?
    connections--
    isDisconnected(callback)

isDisconnected = (callback)->
  console.log "SHOULD BE DISCONNETCED", mongoose.connection.readyState
  throw new Error "Cannot disconnect more than #{MAX_DISCONNECTION_RETRIES} retries" if disConnectionRetries > MAX_DISCONNECTION_RETRIES
  if mongoose.connection.readyState == 0
    disConnectionRetries = 0
    return callback()
  else
    disConnectionRetries++
    return setTimeout ()->
      isDisconnected(callback)
    , 50