47 lines
1.6 KiB
JavaScript
47 lines
1.6 KiB
JavaScript
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// Copyright 2019 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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load("test/mjsunit/wasm/wasm-module-builder.js");
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function createExport(fun) {
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let builder = new WasmModuleBuilder();
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let fun_index = builder.addImport("m", "fun", kSig_i_v)
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builder.addExport("fun", fun_index);
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let instance = builder.instantiate({ m: { fun: fun }});
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return instance.exports.fun;
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}
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// Test that re-exporting a generic JavaScript function changes identity, as
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// the resulting export is an instance of {WebAssembly.Function} instead.
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(function TestReExportOfJS() {
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print(arguments.callee.name);
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function fun() { return 7 }
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let exported = createExport(fun);
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assertNotSame(exported, fun);
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assertEquals(7, exported());
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assertEquals(7, fun());
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})();
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// Test that re-exporting and existing {WebAssembly.Function} that represents
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// regular WebAssembly functions preserves identity.
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(function TestReReExportOfWasm() {
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print(arguments.callee.name);
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let builder = new WasmModuleBuilder();
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builder.addFunction('fun', kSig_i_v).addBody([kExprI32Const, 9]).exportFunc();
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let fun = builder.instantiate().exports.fun;
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let exported = createExport(fun);
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assertSame(exported, fun);
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assertEquals(9, fun());
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})();
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// Test that re-exporting and existing {WebAssembly.Function} that represents
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// generic JavaScript functions preserves identity.
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(function TestReReExportOfJS() {
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print(arguments.callee.name);
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let fun = createExport(() => 11)
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let exported = createExport(fun);
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assertSame(exported, fun);
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assertEquals(11, fun());
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})();
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