Error running tests with Jest using mysql2 1.7.0

I get the following error after updating from mysql2@^1.6.5 to mysql2@^1.7.0.

ReferenceError: You are trying to `import` a file after the Jest environment has been torn down.

      at Object.getCodec (node_modules/mysql2/node_modules/iconv-lite/lib/index.js:65:27)
      at Object.getDecoder (node_modules/mysql2/node_modules/iconv-lite/lib/index.js:127:23)
      at Object.<anonymous>.exports.decode (node_modules/mysql2/lib/parsers/string.js:10:25)
      at Packet.readNullTerminatedString (node_modules/mysql2/lib/packets/packet.js:384:25)
      at Function.fromPacket (node_modules/mysql2/lib/packets/handshake.js:58:33)
C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\node_modules\iconv-lite\lib\index.js:106
                throw new Error("Encoding not recognized: '" + encoding + "' (searched as: '"+enc+"')");
                ^

Error: Encoding not recognized: 'cesu8' (searched as: 'cesu8')
    at Object.getCodec (C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\node_modules\iconv-lite\lib\index.js:106:23)
    at Object.getDecoder (C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\node_modules\iconv-lite\lib\index.js:127:23)
    at Object.<anonymous>.exports.decode (C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\lib\parsers\string.js:10:25)
    at Packet.readNullTerminatedString (C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\lib\packets\packet.js:384:25)
siroc\repositories\sphinxql\node_modules\mysql2\lib\packets\handshake.js:58:33)
    at ClientHandshake.handshakeInit (C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\lib\commands\client_handshake.js:92:40)
    at ClientHandshake.execute (C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\lib\commands\command.js:39:22)
    at Connection.handlePacket (C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\lib\connection.js:449:32)
    at PacketParser.Connection.packetParser.p [as onPacket] (C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\lib\connection.js:72:12)
    at PacketParser.executeStart (C:\Users\siroc\repositories\sphinxql\node_modules\mysql2\lib\packet_parser.js:75:16)

If you want to see the project with all updated (except the mysql2 package) to replicate the problem use https://github.com/SiroDiaz/sphinxql. Note that it is under develop branch. Just try to update mysql2 to latest version(1.7.0), start Manticore search 3.1.0 and run jest tests.

Start Manticore search daemon:

cd __tests__
searchd --config sphinx.conf

[halfer]

There’s two errors here. The second one:

Error: Encoding not recognized: 'cesu8' (searched as: 'cesu8')

This can be resolved using this code (tests/setup.js):

// Little fix for Jest, see https://stackoverflow.com/a/54175600
require('mysql2/node_modules/iconv-lite').encodingExists('foo');

Then wire it in using jest.config.json:

{
  "setupFilesAfterEnv": ["<rootDir>/tests/setup.js"]
}

[damianobarbati]

Not working with native ESM (type=module).

What’s going on?