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Matteo Collina
569369f927
Add mount/unmount lifecycle on `VirtualFileSystem`, a handler registry that fs.js and fs/promises.js consult via `vfsState.handlers`, and a router that maps absolute paths to the VFS that owns them. When a VFS is mounted, the public `fs.*` and `fs/promises` APIs (including streams, `fs.watch`, and `opendir`) dispatch to the provider for paths under the mount point, and fall through to the real filesystem otherwise. Includes per-method dispatch tests, error-path coverage, multi-mount routing tests, and router unit tests. Ref: https://github.com/nodejs/node/pull/63115 Signed-off-by: Matteo Collina <hello@matteocollina.com> PR-URL: https://github.com/nodejs/node/pull/63537 Refs: https://github.com/nodejs/node/pull/63115 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Paolo Insogna <paolo@cowtech.it>
62 lines
1.7 KiB
JavaScript
62 lines
1.7 KiB
JavaScript
// Flags: --experimental-vfs
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'use strict';
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// fs.statSync / fs.lstatSync / fs.statfsSync dispatch through the VFS layer,
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// including the `throwIfNoEntry: false` option.
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require('../common');
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const assert = require('assert');
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const fs = require('fs');
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const path = require('path');
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const vfs = require('node:vfs');
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const mountPoint = path.resolve('/tmp/vfs-statSync-' + process.pid);
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const myVfs = vfs.create();
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myVfs.mkdirSync('/src', { recursive: true });
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myVfs.writeFileSync('/src/hello.txt', 'hello world');
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myVfs.mount(mountPoint);
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// statSync on a regular file
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{
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const s = fs.statSync(path.join(mountPoint, 'src/hello.txt'));
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assert.strictEqual(s.isFile(), true);
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assert.strictEqual(s.size, 11);
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}
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// statSync with throwIfNoEntry:false on missing path
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assert.strictEqual(
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fs.statSync(path.join(mountPoint, 'missing'), { throwIfNoEntry: false }),
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undefined,
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);
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// statSync on missing path throws ENOENT by default
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assert.throws(() => fs.statSync(path.join(mountPoint, 'missing')),
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{ code: 'ENOENT' });
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// lstatSync on a regular file
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{
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const s = fs.lstatSync(path.join(mountPoint, 'src/hello.txt'));
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assert.strictEqual(s.isFile(), true);
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}
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// lstatSync with throwIfNoEntry:false on missing path
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assert.strictEqual(
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fs.lstatSync(path.join(mountPoint, 'missing'), { throwIfNoEntry: false }),
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undefined,
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);
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// statfsSync returns number-typed values by default
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{
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const s = fs.statfsSync(path.join(mountPoint, 'src/hello.txt'));
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assert.strictEqual(typeof s.bsize, 'number');
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}
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// statfsSync with bigint:true returns BigInt fields
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{
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const s = fs.statfsSync(path.join(mountPoint, 'src/hello.txt'),
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{ bigint: true });
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assert.strictEqual(typeof s.bsize, 'bigint');
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}
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myVfs.unmount();
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