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95bef5af88
Split `module.link(linker)` into two synchronous step `sourceTextModule.linkRequests()` and `sourceTextModule.instantiate()`. This allows creating vm modules and resolving the dependencies in a complete synchronous procedure. This also makes `syntheticModule.link()` redundant. The link step for a SyntheticModule is no-op and is already taken care in the constructor by initializing the binding slots with the given export names. PR-URL: https://github.com/nodejs/node/pull/59000 Refs: https://github.com/nodejs/node/issues/37648 Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
100 lines
2.0 KiB
JavaScript
100 lines
2.0 KiB
JavaScript
'use strict';
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// Flags: --experimental-vm-modules
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require('../common');
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const assert = require('assert');
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const { SourceTextModule } = require('vm');
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const test = require('node:test');
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test('simple module', () => {
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const foo = new SourceTextModule(`
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export const foo = 4
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export default 5;
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`);
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foo.linkRequests([]);
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foo.instantiate();
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assert.deepStrictEqual(
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Reflect.ownKeys(foo.namespace),
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['default', 'foo', Symbol.toStringTag]
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);
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});
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test('linkRequests can not be skipped', () => {
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const foo = new SourceTextModule(`
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export const foo = 4
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export default 5;
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`);
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assert.throws(() => {
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foo.instantiate();
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}, {
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code: 'ERR_VM_MODULE_LINK_FAILURE',
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});
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});
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test('re-export simple name', () => {
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const foo = new SourceTextModule(`
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export { bar } from 'bar';
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`);
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const bar = new SourceTextModule(`
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export const bar = 42;
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`);
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foo.linkRequests([bar]);
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foo.instantiate();
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assert.deepStrictEqual(
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Reflect.ownKeys(foo.namespace),
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['bar', Symbol.toStringTag]
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);
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});
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test('re-export-star', () => {
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const foo = new SourceTextModule(`
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export * from 'bar';
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`);
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const bar = new SourceTextModule(`
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export const bar = 42;
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`);
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foo.linkRequests([bar]);
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foo.instantiate();
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assert.deepStrictEqual(
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Reflect.ownKeys(foo.namespace),
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['bar', Symbol.toStringTag]
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);
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});
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test('deep re-export-star', () => {
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let stackTop = new SourceTextModule(`
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export const foo = 4;
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`);
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stackTop.linkRequests([]);
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for (let i = 0; i < 10; i++) {
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const mod = new SourceTextModule(`
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export * from 'stack?top';
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`);
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mod.linkRequests([stackTop]);
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stackTop = mod;
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}
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stackTop.instantiate();
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assert.deepStrictEqual(
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Reflect.ownKeys(stackTop.namespace),
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['foo', Symbol.toStringTag]
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);
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});
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test('should throw if the module is not linked', () => {
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const foo = new SourceTextModule(`
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import { bar } from 'bar';
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`);
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assert.throws(() => {
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foo.instantiate();
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}, {
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code: 'ERR_VM_MODULE_LINK_FAILURE',
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});
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});
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