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09a8440b45
PR-URL: https://github.com/nodejs/node/pull/51362 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
36 lines
1.3 KiB
JavaScript
36 lines
1.3 KiB
JavaScript
// Copyright 2022 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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"use strict";
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d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');
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let instance = (() => {
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let builder = new WasmModuleBuilder();
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let struct = builder.addStruct([makeField(kWasmI32, true)]);
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builder.addFunction('createStruct', makeSig([kWasmI32], [kWasmEqRef]))
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.addBody([
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kExprLocalGet, 0,
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kGCPrefix, kExprStructNew, struct])
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.exportFunc();
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builder.addFunction('passObj', makeSig([kWasmExternRef], [kWasmExternRef]))
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.addBody([kExprLocalGet, 0])
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.exportFunc();
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return builder.instantiate({});
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})();
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let obj = instance.exports.createStruct(123);
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// The struct is opaque and doesn't have any observable properties.
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assertFalse(obj instanceof Object);
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assertEquals([], Object.getOwnPropertyNames(obj));
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// It can be passed as externref without any observable change.
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let passObj = instance.exports.passObj;
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let obj2 = passObj(obj);
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assertFalse(obj2 instanceof Object);
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assertEquals([], Object.getOwnPropertyNames(obj2));
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assertSame(obj, obj2);
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// A JavaScript object can be passed as externref.
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let jsObject = {"hello": "world"};
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assertSame(jsObject, passObj(jsObject));
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