Require of @stoplight/spectral-core 1.7.0 fails to error node js 16

[Havunen]

usage:

const { Spectral, isOpenApiv2, isOpenApiv3, mergeRules } = require('@stoplight/spectral-core');

results =>

    Cannot find module 'nimma/legacy' from 'node_modules/@stoplight/spectral-core/dist/runner/runner.js'

    Require stack:
      node_modules/@stoplight/spectral-core/dist/runner/runner.js
      node_modules/@stoplight/spectral-core/dist/runner/index.js
      node_modules/@stoplight/spectral-core/dist/spectral.js
      node_modules/@stoplight/spectral-core/dist/index.js
      src/spectral/utils/spectral-validator.js
      src/cli-validator/utils/validator.js
      src/cli-validator/runValidator.js
      test/cli-validator/tests/error-handling.test.js

      at Resolver.resolveModule (node_modules/jest-resolve/build/resolver.js:324:11)
      at Object.<anonymous> (node_modules/@stoplight/spectral-core/src/runner/runner.ts:9:1)

what is nimma/legacy? .... 😠

[P0lip]

It's not an issue with Node.js, but with Jest not understanding package exports
You should either enable ESM support in Jest as explained here or set an appropriate moduleNameMapper, i.e. '^nimma/legacy$': '<rootDir>/node_modules/nimma/dist/legacy/cjs/index.js',

[tmtron]

I also had to map some more modules (when using "ibm-openapi-validator": "0.52.0"):

  moduleNameMapper: {
    '^nimma/legacy$': '<rootDir>/node_modules/nimma/dist/legacy/cjs/index.js',
    '^nimma/(.*)': '<rootDir>/node_modules/nimma/dist/cjs/$1',
    '^@stoplight/spectral-ruleset-bundler/(.*)$': '<rootDir>/node_modules/@stoplight/spectral-ruleset-bundler/dist/$1'
  }

[DavidBiesack]

I also had to add

    '^nimma/fallbacks$': '<rootDir>/node_modules/nimma/dist/legacy/cjs/fallbacks/index.js'

to get Jest to work with spectral-core

[cb-shivamagarwal]

Ref - #2167 (comment)

[tmtron]

After upgrading to jest 28, we could remove the moduleNameMapper workaround.