Jest did not exit one second after the test run has completed. 이슈

안녕하세요!!

npm test를 하면 끝부분에 항상 다음과 같은 메세지가 나오는데요,

>>>>>Ran all test suites.

Jest did not exit one second after the test run has completed.

This usually means that there are asynchronous operations that weren't stopped in your tests. Consider running Jest with `--detectOpenHandles` to troubleshoot this issue.

^C

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위 문제를 해결해주기 위해 package.json을 다음과 같이 설정해주면,

>>>>>>>

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위에 나왔던 메세지 대신에 아래와같은 에러 메세지가 나옵니다.

>>>>>>>>>

Jest has detected the following 1 open handle potentially keeping Jest from exiting:

  ●  TCPWRAP

       9 | const mongoose = require('mongoose');

      10 |

    > 11 | mongoose.connect(

         |          ^

      12 |   'mongodb://127.0.0.1:27017/tdd-test',

      13 |   {

      14 |     useNewUrlParser: true,

      at makeConnection (node_modules/mongodb/src/cmap/connect.ts:395:18)

      at connect (node_modules/mongodb/src/cmap/connect.ts:61:3)

      at checkServer (node_modules/mongodb/src/sdam/monitor.ts:300:10)

      at node_modules/mongodb/src/sdam/monitor.ts:341:5

      at executeAndReschedule (node_modules/mongodb/src/utils.ts:1026:5)

      at makeInterruptibleAsyncInterval (node_modules/mongodb/src/utils.ts:1033:5)

      at Monitor.connect (node_modules/mongodb/src/sdam/monitor.ts:147:54)

      at Server.connect (node_modules/mongodb/src/sdam/server.ts:236:22)

      at createAndConnectServer (node_modules/mongodb/src/sdam/topology.ts:907:10)

      at node_modules/mongodb/src/sdam/topology.ts:921:22

          at Array.reduce (<anonymous>)

      at connectServers (node_modules/mongodb/src/sdam/topology.ts:919:43)

      at Topology.connect (node_modules/mongodb/src/sdam/topology.ts:438:5)

      at createTopology (node_modules/mongodb/src/operations/connect.ts:97:12)

      at connect (node_modules/mongodb/src/operations/connect.ts:52:10)

      at node_modules/mongodb/src/mongo_client.ts:432:14

      at maybePromise (node_modules/mongodb/src/utils.ts:609:3)

      at MongoClient.connect (node_modules/mongodb/src/mongo_client.ts:431:24)

      at node_modules/mongoose/lib/connection.js:796:12

      at NativeConnection.Object.<anonymous>.Connection.openUri (node_modules/mongoose/lib/connection.js:781:19)

      at node_modules/mongoose/lib/index.js:340:10

      at node_modules/mongoose/lib/helpers/promiseOrCallback.js:32:5

      at promiseOrCallback (node_modules/mongoose/lib/helpers/promiseOrCallback.js:31:10)

      at Mongoose.Object.<anonymous>.Mongoose._promiseOrCallback (node_modules/mongoose/lib/index.js:1140:10)

      at Mongoose.connect (node_modules/mongoose/lib/index.js:339:20)

      at Object.<anonymous> (server.js:11:10)

      at Object.<anonymous> (test/itegration/product.int.test.js:2:13)

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이런 에러나 메세지가 나오지 않도록 조치할 수 있는 방법이 있을까요?

감사합니다.