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2c5138a4c7
* Add tests for abrupt completions during JSON.parse Due to the use of the IsArray abstract operation, observing many of the targeted semantics requires the use of a Proxy exotic object. Mark the tests that require this unrelated ES2015 feature using a dedicated "features" flag.
45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
// Copyright (C) 2016 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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esid: sec-internalizejsonproperty
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es6id: 24.3.1.1
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description: >
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Abrupt completion from coercing array "length" property to a number value
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info: |
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JSON.parse ( text [ , reviver ] )
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[...]
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7. If IsCallable(reviver) is true, then
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[...]
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e. Return ? InternalizeJSONProperty(root, rootName).
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Runtime Semantics: InternalizeJSONProperty ( holder, name)
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1. Let val be ? Get(holder, name).
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2. If Type(val) is Object, then
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a. Let isArray be ? IsArray(val).
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b. If isArray is true, then
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i. Set I to 0.
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ii. Let len be ? ToLength(? Get(val, "length")).
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features: [Proxy]
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---*/
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var uncoercible = {
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valueOf: function() {
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throw new Test262Error();
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}
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};
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var badLength = new Proxy([], {
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get: function(_, name) {
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if (name === 'length') {
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return uncoercible;
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}
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}
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});
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assert.throws(Test262Error, function() {
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JSON.parse('[0,0]', function() {
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this[1] = badLength;
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});
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});
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