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76 lines
2.7 KiB
JavaScript
76 lines
2.7 KiB
JavaScript
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// deno-fmt-ignore-file
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// deno-lint-ignore-file
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// Copyright Joyent and Node contributors. All rights reserved. MIT license.
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// Taken from Node 20.11.1
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// This file is automatically generated by `tests/node_compat/runner/setup.ts`. Do not modify this file manually.
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'use strict';
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// This tests to make sure that modules with symlinked circular dependencies
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// do not blow out the module cache and recurse forever. See issue
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// https://github.com/nodejs/node/pull/5950 for context. PR #5950 attempted
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// to solve a problem with symlinked peer dependencies by caching using the
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// symlink path. Unfortunately, that breaks the case tested in this module
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// because each symlinked module, despite pointing to the same code on disk,
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// is loaded and cached as a separate module instance, which blows up the
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// cache and leads to a recursion bug.
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// This test should pass in Node.js v4 and v5. It should pass in Node.js v6
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// after https://github.com/nodejs/node/pull/5950 has been reverted.
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const common = require('../common');
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const assert = require('assert');
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const path = require('path');
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const fs = require('fs');
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// {tmpDir}
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// ├── index.js
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// └── node_modules
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// ├── moduleA
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// │ ├── index.js
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// │ └── node_modules
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// │ └── moduleB -> {tmpDir}/node_modules/moduleB
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// └── moduleB
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// ├── index.js
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// └── node_modules
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// └── moduleA -> {tmpDir}/node_modules/moduleA
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const tmpdir = require('../common/tmpdir');
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tmpdir.refresh();
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const tmpDir = tmpdir.path;
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const node_modules = path.join(tmpDir, 'node_modules');
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const moduleA = path.join(node_modules, 'moduleA');
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const moduleB = path.join(node_modules, 'moduleB');
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const moduleA_link = path.join(moduleB, 'node_modules', 'moduleA');
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const moduleB_link = path.join(moduleA, 'node_modules', 'moduleB');
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fs.mkdirSync(node_modules);
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fs.mkdirSync(moduleA);
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fs.mkdirSync(moduleB);
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fs.mkdirSync(path.join(moduleA, 'node_modules'));
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fs.mkdirSync(path.join(moduleB, 'node_modules'));
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try {
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fs.symlinkSync(moduleA, moduleA_link);
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fs.symlinkSync(moduleB, moduleB_link);
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} catch (err) {
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if (err.code !== 'EPERM') throw err;
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common.skip('insufficient privileges for symlinks');
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}
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fs.writeFileSync(path.join(tmpDir, 'index.js'),
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'module.exports = require(\'moduleA\');', 'utf8');
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fs.writeFileSync(path.join(moduleA, 'index.js'),
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'module.exports = {b: require(\'moduleB\')};', 'utf8');
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fs.writeFileSync(path.join(moduleB, 'index.js'),
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'module.exports = {a: require(\'moduleA\')};', 'utf8');
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// Ensure that the symlinks are not followed forever...
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const obj = require(path.join(tmpDir, 'index'));
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assert.ok(obj);
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assert.ok(obj.b);
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assert.ok(obj.b.a);
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assert.ok(!obj.b.a.b);
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