forked from LeenkxTeam/Kmake
53 lines
1.5 KiB
JavaScript
53 lines
1.5 KiB
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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//
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// Flags: --allow-natives-syntax --no-lazy-feedback-allocation
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let setter_calls = 0;
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// Single canonical setter function, so that ClassWithSetter.foo has monomorphic
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// setter JSFunction.
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function setter_function() {
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print("Oh no, someone called the setter!");
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setter_calls++;
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}
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class ClassWithFooSetter {
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constructor() {
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// Define a "foo" setter on `this` using Object.defineProperty, so that it's
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// on the receiver and not the prototype.
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Object.defineProperty(this, "foo", {
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configurable: true,
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set: setter_function,
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});
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}
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}
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class ClassWithFooField extends ClassWithFooSetter {
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// Public fields are written using "DefineOwn", so in particular this write
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// shouldn't trigger the "foo" setter present on the receiver after the
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// ClassWithFooSetter construction.
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foo = 42;
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}
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// Run ClassWithFooField once, to populate the feedback vector...
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let o1 = new ClassWithFooField();
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// ... and again, to use the IC handler.
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let o2 = new ClassWithFooField();
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assertEquals(Object.getOwnPropertyDescriptor(o1, "foo"), {
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value: 42,
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writable: true,
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enumerable: true,
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configurable: true,
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});
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assertEquals(Object.getOwnPropertyDescriptor(o2, "foo"), {
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value: 42,
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writable: true,
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enumerable: true,
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configurable: true,
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});
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// The foo setter should not have been called.
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assertEquals(setter_calls, 0);
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