test/es-module/test-esm-loader-invalid-format.mjs

// Flags: --experimental-loader ./test/fixtures/es-module-loaders/loader-invalid-format.mjs
import { expectsError, mustCall } from '../common/index.mjs';
import assert from 'assert';

import('../fixtures/es-modules/test-esm-ok.mjs')
.then(assert.fail, expectsError({
  code: 'ERR_UNKNOWN_MODULE_FORMAT',
  message: /Unknown module format: esm/
}))
.then(mustCall());