tor-browser

The Tor Browser
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locales-length-tolength-throws.js (1896B)

      1 // Copyright (C) 2019 Leo Balter. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 esid: sec-Intl.DisplayNames
      6 description: >
      7  Return abrupt completion from Locales invalid length
      8 info: |
      9  Intl.DisplayNames ([ locales [ , options ]])
     10 
     11  1. If NewTarget is undefined, throw a TypeError exception.
     12  2. Let displayNames be ? OrdinaryCreateFromConstructor(NewTarget, "%DisplayNamesPrototype%",
     13    « [[InitializedDisplayNames]], [[Locale]], [[Style]], [[Type]], [[Fallback]], [[Fields]] »).
     14  3. Let requestedLocales be ? CanonicalizeLocaleList(locales).
     15  ...
     16 
     17  CanonicalizeLocaleList ( locales )
     18 
     19  1. If locales is undefined, then
     20    a. Return a new empty List.
     21  2. Let seen be a new empty List.
     22  3. If Type(locales) is String, then
     23    a. Let O be CreateArrayFromList(« locales »).
     24  4. Else,
     25    a. Let O be ? ToObject(locales).
     26  5. Let len be ? ToLength(? Get(O, "length")).
     27 
     28  ToLength ( argument )
     29 
     30  1. Let len be ? ToInteger(argument).
     31  ...
     32 features: [Intl.DisplayNames, Symbol, BigInt]
     33 ---*/
     34 
     35 var locales = {
     36  length: {
     37    valueOf() {
     38      throw new Test262Error();
     39    }
     40  }
     41 };
     42 
     43 assert.throws(Test262Error, () => {
     44  new Intl.DisplayNames(locales);
     45 }, 'poisoned valueOf for ToNumber');
     46 
     47 locales.length = {
     48  [Symbol.toPrimitive]() {
     49    throw new Test262Error();
     50  }
     51 };
     52 assert.throws(Test262Error, () => {
     53  new Intl.DisplayNames(locales);
     54 }, 'poisoned ToPrimitive for ToNumber');
     55 
     56 locales.length = {
     57  toString() {
     58    throw new Test262Error();
     59  }
     60 };
     61 assert.throws(Test262Error, () => {
     62  new Intl.DisplayNames(locales);
     63 }, 'poisoned toString for ToNumber');
     64 
     65 locales.length = Symbol();
     66 assert.throws(TypeError, () => {
     67  new Intl.DisplayNames(locales);
     68 }, 'length is Symbol');
     69 
     70 locales.length = BigInt(1);
     71 assert.throws(TypeError, () => {
     72  new Intl.DisplayNames(locales);
     73 }, 'length is BigInt');
     74 
     75 reportCompare(0, 0);