Skip to content

Error: Must use import to load ES Module for undici/lib/llhttp/llhttp.wasm #2062

@jeromemacias

Description

@jeromemacias

Bug Description

Error when loading undici into jest unit tests

Logs

Tests run using:
NODE_OPTIONS=--experimental-vm-modules npx jest --run-in-band --verbose --ci

Error log:

/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:841
      const error = new Error(
                    ^

Error: Must use import to load ES Module: /home/runner/work/my-project/my-project/node_modules/undici/lib/llhttp/llhttp.wasm
    at Runtime.requireModule (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:841:21)
    at Runtime.requireModuleOrMock (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:1039:21)
    at lazyllhttp (/home/runner/work/my-project/my-project/node_modules/undici/lib/client.js:362:55)
    at Object.<anonymous> (/home/runner/work/my-project/my-project/node_modules/undici/lib/client.js:424:21)
    at Runtime._execModule (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:1429:24)
    at Runtime._loadModule (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:1013:12)
    at Runtime.requireModule (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:873:12)
    at Runtime.requireModuleOrMock (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:1039:21)
    at Object.<anonymous> (/home/runner/work/my-project/my-project/node_modules/undici/index.js:3:16)
    at Runtime._execModule (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:1429:24)
    at Runtime._loadModule (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:1013:12)
    at Runtime.requireModule (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:873:12)
    at Runtime.requireModuleOrMock (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:1039:21)
    at Runtime.loadCjsAsEsm (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:717:22)
    at Runtime.resolveModule (/home/runner/work/my-project/my-project/node_modules/jest-runtime/build/index.js:675:17)
    at ModuleWrap.<anonymous> (node:internal/vm/module:306:24) {
  code: 'ERR_REQUIRE_ESM'

Environment

NodeJS: 18.15.0
Jest: 29.5.0
ts-jest: 29.0.5
ts-node: 10.9.1
typescript: 4.9.5
undici: 5.21.2

Jest config:

export default {
  preset: 'ts-jest/presets/default-esm',
  moduleNameMapper: {
    '^(\\.{1,2}/.*)\\.js$': '$1'
  },
  extensionsToTreatAsEsm: ['.ts'],
  testEnvironment: 'node',
  roots: ['<rootDir>/src/']
}

TS config:

{
  "compilerOptions": {
    "lib": ["ESNext", "DOM"],
    "target": "ES2022",
    "strict": false,
    "module": "NodeNext",
    "moduleResolution": "nodenext",
    "esModuleInterop": true,
    "forceConsistentCasingInFileNames": true,
    "sourceMap": true,
    "declaration": true,
    "declarationMap": true, // enables importers to jump to source
    "removeComments": true
  },
  "include": ["src/**/*", "test/*"]
}

Additional context

Error appears on undici v5.16.0
Possibly comes from : d0a99c2

Metadata

Metadata

Assignees

No one assigned

    Labels

    bugSomething isn't working

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions