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