18 lines
740 B
JavaScript
18 lines
740 B
JavaScript
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// Copyright 2024 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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// Flags: --allow-natives-syntax
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d8.file.execute('test/mjsunit/wasm/wasm-module-builder.js');
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const builder = new WasmModuleBuilder();
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builder.addFunction("isNull", makeSig([kWasmAnyRef], [kWasmI32]))
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.addBody([kExprLocalGet, 0, kExprRefIsNull]).exportFunc();
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const instance = builder.instantiate({});
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// JS can't directly do anything with %WasmNull as it does not support handling
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// wasm null values (accessing most properties excluding the map will crash).
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// So we internalize it in wasm and check for null.
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assertEquals(1, instance.exports.isNull(%WasmNull()));
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