mirror of https://github.com/tc39/test262.git
45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
// Copyright (C) 2015 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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es6id: 9.5.14
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esid: sec-proxy-object-internal-methods-and-internal-slots-construct-argumentslist-newtarget
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description: >
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If the construct trap value is null, propagate the construct to the target object.
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info: |
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[[Construct]] (argumentsList, newTarget)
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...
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5. Let trap be ? GetMethod(handler, "construct").
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6. If trap is undefined, then
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a. Assert: target has a [[Construct]] internal method.
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b. Return ? Construct(target, argumentsList, newTarget).
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...
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GetMethod ( V, P )
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...
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3. If func is either undefined or null, return undefined.
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...
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features: [new.target, Proxy, Reflect, Reflect.construct]
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---*/
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var calls = 0;
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function NewTarget() {}
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function Target(a, b) {
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assert.sameValue(new.target, NewTarget);
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calls += 1;
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return {
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sum: a + b
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};
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}
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var P = new Proxy(Target, {
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construct: null
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});
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var obj = Reflect.construct(P, [3, 4], NewTarget);
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assert.sameValue(obj.sum, 7, "`construct` trap is `null`");
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assert.sameValue(calls, 1, "target is called once");
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