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81 lines
3 KiB
JavaScript
81 lines
3 KiB
JavaScript
// |reftest| skip-if(!this.hasOwnProperty("Intl"))
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Test subclassing %Intl.DateTimeFormat% works correctly.
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class MyDateTimeFormat extends Intl.DateTimeFormat {}
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var obj = new MyDateTimeFormat();
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assertEq(obj instanceof MyDateTimeFormat, true);
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assertEq(obj instanceof Intl.DateTimeFormat, true);
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assertEq(Object.getPrototypeOf(obj), MyDateTimeFormat.prototype);
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obj = Reflect.construct(MyDateTimeFormat, []);
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assertEq(obj instanceof MyDateTimeFormat, true);
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assertEq(obj instanceof Intl.DateTimeFormat, true);
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assertEq(Object.getPrototypeOf(obj), MyDateTimeFormat.prototype);
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obj = Reflect.construct(MyDateTimeFormat, [], MyDateTimeFormat);
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assertEq(obj instanceof MyDateTimeFormat, true);
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assertEq(obj instanceof Intl.DateTimeFormat, true);
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assertEq(Object.getPrototypeOf(obj), MyDateTimeFormat.prototype);
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obj = Reflect.construct(MyDateTimeFormat, [], Intl.DateTimeFormat);
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assertEq(obj instanceof MyDateTimeFormat, false);
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assertEq(obj instanceof Intl.DateTimeFormat, true);
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assertEq(Object.getPrototypeOf(obj), Intl.DateTimeFormat.prototype);
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// Set a different constructor as NewTarget.
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obj = Reflect.construct(MyDateTimeFormat, [], Array);
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assertEq(obj instanceof MyDateTimeFormat, false);
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assertEq(obj instanceof Intl.DateTimeFormat, false);
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assertEq(obj instanceof Array, true);
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assertEq(Object.getPrototypeOf(obj), Array.prototype);
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obj = Reflect.construct(Intl.DateTimeFormat, [], Array);
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assertEq(obj instanceof Intl.DateTimeFormat, false);
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assertEq(obj instanceof Array, true);
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assertEq(Object.getPrototypeOf(obj), Array.prototype);
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// The prototype defaults to %DateTimeFormatPrototype% if null.
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function NewTargetNullPrototype() {}
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NewTargetNullPrototype.prototype = null;
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obj = Reflect.construct(Intl.DateTimeFormat, [], NewTargetNullPrototype);
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assertEq(obj instanceof Intl.DateTimeFormat, true);
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assertEq(Object.getPrototypeOf(obj), Intl.DateTimeFormat.prototype);
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obj = Reflect.construct(MyDateTimeFormat, [], NewTargetNullPrototype);
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assertEq(obj instanceof MyDateTimeFormat, false);
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assertEq(obj instanceof Intl.DateTimeFormat, true);
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assertEq(Object.getPrototypeOf(obj), Intl.DateTimeFormat.prototype);
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// "prototype" property is retrieved exactly once.
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var trapLog = [], getLog = [];
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var ProxiedConstructor = new Proxy(Intl.DateTimeFormat, new Proxy({
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get(target, propertyKey, receiver) {
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getLog.push(propertyKey);
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return Reflect.get(target, propertyKey, receiver);
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}
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}, {
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get(target, propertyKey, receiver) {
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trapLog.push(propertyKey);
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return Reflect.get(target, propertyKey, receiver);
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}
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}));
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obj = Reflect.construct(Intl.DateTimeFormat, [], ProxiedConstructor);
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assertEqArray(trapLog, ["get"]);
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assertEqArray(getLog, ["prototype"]);
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assertEq(obj instanceof Intl.DateTimeFormat, true);
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assertEq(Object.getPrototypeOf(obj), Intl.DateTimeFormat.prototype);
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if (typeof reportCompare === "function")
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reportCompare(0, 0);
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