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4396cf2d45
PR-URL: https://github.com/nodejs/node/pull/59941 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
import '../common/index.mjs';
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import { strictEqual } from 'node:assert';
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import { readSync } from '../common/fixtures.mjs';
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// Test Wasm JSPI
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{
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const asyncImport = async (x) => {
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await new Promise((resolve) => setTimeout(resolve, 10));
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return x + 42;
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};
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/**
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* wasm/jspi.wasm contains:
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*
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* (module
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* (type (;0;) (func (param i32) (result i32)))
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* (import "js" "async" (func $async (;0;) (type 0)))
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* (export "test" (func $test))
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* (func $test (;1;) (type 0) (param $x i32) (result i32)
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* local.get $x
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* call $async
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* )
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* )
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*
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* Which is the JS equivalent to:
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*
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* import { async_ } from 'js';
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* export function test (val) {
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* return async_(val);
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* }
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*
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* JSPI then allows turning this sync style Wasm call into async code
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* that suspends on the promise.
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*/
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const { instance } = await WebAssembly.instantiate(readSync('wasm/jspi.wasm'), {
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js: {
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async: new WebAssembly.Suspending(asyncImport),
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},
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});
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const promisingExport = WebAssembly.promising(instance.exports.test);
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strictEqual(await promisingExport(10), 52);
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}
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