jest.js 中无法识别编码 [英] Encoding not recognized in jest.js

问题描述

我在使用 node-mysql2、react、sequelize 和 jest 测试项目时遇到问题.此问题仅在测试期间出现.

I have a problem testing a project using node-mysql2, react, sequelize and jest. This problem only occurs during testing.

Encoding not recognized: 'cesu8' (searched as: 'cesu8')
    at Object.getCodec (project/node_modules/mysql2/node_modules/iconv-lite/lib/index.js:106:23)
    at Object.getDecoder (project/node_modules/mysql2/node_modules/iconv-lite/lib/index.js:122:23)
    at Object.<anonymous>.exports.decode (project/node_modules/mysql2/lib/parsers/string.js:9:23)
    at Packet.Object.<anonymous>.Packet.readNullTerminatedString (project/node_modules/mysql2/lib/packets/packet.js:373:23)
    at Function.Object.<anonymous>.Handshake.fromPacket (project/node_modules/mysql2/lib/packets/handshake.js:18:31)
    at ClientHandshake.Object.<anonymous>.ClientHandshake.handshakeInit (project/node_modules/mysql2/lib/commands/client_handshake.js:98:38)
    at ClientHandshake.Object.<anonymous>.Command.execute (project/node_modules/mysql2/lib/commands/command.js:40:20)
    at Connection.Object.<anonymous>.Connection.handlePacket (project/node_modules/mysql2/lib/connection.js:515:28)
    at PacketParser.onPacket (project/node_modules/mysql2/lib/connection.js:94:16)
    at PacketParser.executeStart (project/node_modules/mysql2/lib/packet_parser.js:77:14)
    at Socket.<anonymous> (project/node_modules/mysql2/lib/connection.js:102:29)

推荐答案

这是由 mysql2 对编码进行动态延迟要求导致的问题，而 Jest 无法处理此问题.在此处查看一些用户建议的解决方法:

This is problem caused by mysql2 doing dynamic lazy require of encodings and Jest not being able to handle this. Have a look at few workarounds users suggested here:

将此代码段添加到 setupTestFrameworkScriptFile

require('mysql2/node_modules/iconv-lite').encodingExists('foo');

或者在你的代码早期的某个地方:

or this somewhere early to your code:

import iconv from 'iconv-lite';
import encodings from 'iconv-lite/encodings';
iconv.encodings = encodings;

这篇关于jest.js 中无法识别编码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！