js/src/tests/test262/built-ins/Array/prototype/findLastIndex/return-abrupt-from-this-length-as-symbol.js


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// Copyright (C) 2021 Microsoft. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-array.prototype.findlastindex
description: >
  Return abrupt from ToLength(Get(O, "length")) where length is a Symbol.
info: |
  Array.prototype.findLastIndex ( predicate[ , thisArg ] )

  1. Let O be ? ToObject(this value).
  2. Let len be ? LengthOfArrayLike(O).
  ...
features: [Symbol, array-find-from-last]
---*/

var o = {};

o.length = Symbol(1);

// predicate fn is given to avoid false positives
assert.throws(TypeError, function() {
  [].findLastIndex.call(o, function() {});
});

reportCompare(0, 0);