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// Flags: --experimental-loader ./test/fixtures/es-module-loaders/hooks-custom.mjs import '../common/index.mjs'; import assert from 'assert'; await assert.rejects( import('nonexistent/file.mjs'), { code: 'ERR_MODULE_NOT_FOUND' }, ); await assert.rejects( import('../fixtures/es-modules/file.unknown'), { code: 'ERR_UNKNOWN_FILE_EXTENSION' }, ); await assert.rejects( import('esmHook/badReturnVal.mjs'), { code: 'ERR_INVALID_RETURN_VALUE' }, ); // Nullish values are allowed; booleans are not await assert.rejects( import('esmHook/format.false'), { code: 'ERR_INVALID_RETURN_PROPERTY_VALUE' }, ); await assert.rejects( import('esmHook/format.true'), { code: 'ERR_INVALID_RETURN_PROPERTY_VALUE' }, ); await assert.rejects( import('esmHook/badReturnFormatVal.mjs'), { code: 'ERR_INVALID_RETURN_PROPERTY_VALUE' }, ); await assert.rejects( import('esmHook/unsupportedReturnFormatVal.mjs'), { code: 'ERR_UNKNOWN_MODULE_FORMAT' }, ); await assert.rejects( import('esmHook/badReturnSourceVal.mjs'), { code: 'ERR_INVALID_RETURN_PROPERTY_VALUE' }, ); await import('../fixtures/es-module-loaders/js-as-esm.js') .then((parsedModule) => { assert.strictEqual(typeof parsedModule, 'object'); assert.strictEqual(parsedModule.namedExport, 'named-export'); }); // The custom loader tells node .ext files are MJS await import('../fixtures/es-modules/file.ext') .then((parsedModule) => { assert.strictEqual(typeof parsedModule, 'object'); const { default: defaultExport } = parsedModule; assert.strictEqual(typeof defaultExport, 'function'); assert.strictEqual(defaultExport.name, 'iAmReal'); assert.strictEqual(defaultExport(), true); }); // The custom loader's resolve hook predetermines the format await import('esmHook/preknownFormat.pre') .then((parsedModule) => { assert.strictEqual(typeof parsedModule, 'object'); assert.strictEqual(parsedModule.default, 'hello world'); }); // The custom loader provides source even though file does not actually exist await import('esmHook/virtual.mjs') .then((parsedModule) => { assert.strictEqual(typeof parsedModule, 'object'); assert.strictEqual(typeof parsedModule.default, 'undefined'); assert.strictEqual(parsedModule.message, 'WOOHOO!'); }); // Ensure custom loaders have separate context from userland // hooks-custom.mjs also increments count (which starts at 0) // if both share context, count here would be 2 await import('../fixtures/es-modules/stateful.mjs') .then(({ default: count }) => { assert.strictEqual(count(), 1); });