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Previously, when require()-ing builtins with the node: prefix, the sync resolve hooks were not properly invoked, and load hooks could not override the builtin's format. This fixes the handling and enables redirecting prefixed built-ins to on-disk files and overriding them with other module types via hooks. PR-URL: https://github.com/nodejs/node/pull/61088 Fixes: https://github.com/nodejs/node/issues/60005 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
38 lines
1.2 KiB
JavaScript
38 lines
1.2 KiB
JavaScript
'use strict';
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// This tests that load hooks can override the format of builtin modules
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// to 'json' format.
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const common = require('../common');
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const assert = require('assert');
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const { registerHooks } = require('module');
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// Pick a builtin that's unlikely to be loaded already - like zlib.
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assert(!process.moduleLoadList.includes('NativeModule zlib'));
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const hook = registerHooks({
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load: common.mustCall(function load(url, context, nextLoad) {
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// Only intercept zlib builtin
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if (url === 'node:zlib') {
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// Return JSON format to override the builtin
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return {
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source: JSON.stringify({ custom_zlib: 'JSON overridden zlib' }),
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format: 'json',
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shortCircuit: true,
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};
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}
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return nextLoad(url, context);
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}, 2), // Called twice: once for 'zlib', once for 'node:zlib'
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});
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// Test: Load hook overrides builtin format to json
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const zlib = require('zlib');
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assert.strictEqual(zlib.custom_zlib, 'JSON overridden zlib');
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assert.strictEqual(typeof zlib.createGzip, 'undefined'); // Original zlib API should not be available
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// Test with node: prefix
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const zlib2 = require('node:zlib');
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assert.strictEqual(zlib2.custom_zlib, 'JSON overridden zlib');
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assert.strictEqual(typeof zlib2.createGzip, 'undefined');
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hook.deregister();
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