1'use strict'; 2 3const { spawnPromisified } = require('../common'); 4const fixtures = require('../common/fixtures.js'); 5const assert = require('node:assert'); 6const { execPath } = require('node:process'); 7const { describe, it } = require('node:test'); 8 9 10// In a "type": "module" package scope, files with unknown extensions or no 11// extensions should throw; both when used as a main entry point and also when 12// referenced via `import`. 13describe('ESM: extensionless and unknown specifiers', { concurrency: true }, () => { 14 for ( 15 const fixturePath of [ 16 '/es-modules/package-type-module/noext-esm', 17 '/es-modules/package-type-module/imports-noext.mjs', 18 '/es-modules/package-type-module/extension.unknown', 19 '/es-modules/package-type-module/imports-unknownext.mjs', 20 ] 21 ) { 22 it('should throw', async () => { 23 const entry = fixtures.path(fixturePath); 24 const { code, signal, stderr, stdout } = await spawnPromisified(execPath, [entry]); 25 26 assert.strictEqual(code, 1); 27 assert.strictEqual(signal, null); 28 assert.strictEqual(stdout, ''); 29 assert.ok(stderr.includes('ERR_UNKNOWN_FILE_EXTENSION')); 30 if (fixturePath.includes('noext')) { 31 // Check for explanation to users 32 assert.ok(stderr.includes('extensionless')); 33 } 34 }); 35 } 36}); 37