js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/fromindex-zero-conversion.js


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// Copyright 2016 The V8 project authors. All rights reserved.
// This code is governed by the license found in the LICENSE file.
/*---
esid: sec-array.prototype.lastindexof
description: >
  Return +0 when fromIndex is -0 and return index refers to the first position
info: |
  22.1.3.15 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] )

  ...
  5. If n ≥ 0, then
    a. If n is -0, let k be +0; else let k be min(n, len - 1).
  ...
---*/

assert.sameValue(1 / [true].lastIndexOf(true, -0), +Infinity);

reportCompare(0, 0);