c9562ddb82Adds the node:vfs builtin module with VirtualFileSystem and provider classes. No integration with fs, modules, or SEA. Assisted-by: Claude-Opus4.7 Signed-off-by: Matteo Collina <hello@matteocollina.com> PR-URL: https://github.com/nodejs/node/pull/63115 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Paolo Insogna <paolo@cowtech.it> Reviewed-By: Robert Nagy <ronagy@icloud.com> Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
56 lines
1.7 KiB
JavaScript
56 lines
1.7 KiB
JavaScript
// Flags: --experimental-vfs
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'use strict';
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// Symlink behaviour in the default (memory) VFS:
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// - Loop detection (ELOOP)
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// - Absolute and relative targets
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// - Symlinked parent directories transparently follow
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require('../common');
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const assert = require('assert');
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const vfs = require('node:vfs');
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// Direct symlink loop: /a -> /b -> /a
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{
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const myVfs = vfs.create();
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myVfs.symlinkSync('/b', '/a');
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myVfs.symlinkSync('/a', '/b');
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assert.throws(() => myVfs.statSync('/a'), { code: 'ELOOP' });
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assert.throws(() => myVfs.realpathSync('/a'), { code: 'ELOOP' });
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}
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// Symlink loop in an intermediate path component
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{
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const myVfs = vfs.create();
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myVfs.symlinkSync('/loop2', '/loop1');
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myVfs.symlinkSync('/loop1', '/loop2');
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assert.throws(() => myVfs.statSync('/loop1/sub'), { code: 'ELOOP' });
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}
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// Absolute symlink target inside the VFS
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{
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const myVfs = vfs.create();
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myVfs.mkdirSync('/dir');
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myVfs.writeFileSync('/dir/file.txt', 'hi');
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myVfs.symlinkSync('/dir', '/abs-link');
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assert.strictEqual(myVfs.readFileSync('/abs-link/file.txt', 'utf8'), 'hi');
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}
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// Symlinked parent directory transparently follows on read+write
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{
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const myVfs = vfs.create();
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myVfs.mkdirSync('/real-dir');
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myVfs.writeFileSync('/real-dir/file.txt', 'hello');
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myVfs.symlinkSync('/real-dir', '/link-dir');
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assert.strictEqual(myVfs.readFileSync('/link-dir/file.txt', 'utf8'), 'hello');
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myVfs.writeFileSync('/link-dir/new.txt', 'new');
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assert.strictEqual(myVfs.readFileSync('/real-dir/new.txt', 'utf8'), 'new');
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}
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// Symlink onto an existing path throws EEXIST
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{
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const myVfs = vfs.create();
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myVfs.writeFileSync('/a.txt', 'x');
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assert.throws(() => myVfs.symlinkSync('/a.txt', '/a.txt'), { code: 'EEXIST' });
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}
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