// Copyright (C) 2016 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- esid: sec-%typedarray%.prototype.lastindexof description: search element is compared using strict comparing (===) info: | 22.2.3.17 %TypedArray%.prototype.lastIndexOf ( searchElement [ , fromIndex ] ) %TypedArray%.prototype.lastIndexOf is a distinct function that implements the same algorithm as Array.prototype.lastIndexOf as defined in 22.1.3.15 except that the this object's [[ArrayLength]] internal slot is accessed in place of performing a [[Get]] of "length". 22.1.3.15 Array.prototype.lastIndexOf ( searchElement [ , fromIndex ] ) ... 7. Repeat, while k ≥ 0 ... b. If kPresent is true, then i. Let elementK be ? Get(O, ! ToString(k)). ii. Let same be the result of performing Strict Equality Comparison searchElement === elementK. iii. If same is true, return k. ... includes: [testTypedArray.js] features: [TypedArray] ---*/ testWithTypedArrayConstructors(function(TA) { var sample = new TA([42, undefined, NaN, 0, 1]); assert.sameValue(sample.lastIndexOf("42"), -1, "'42'"); assert.sameValue(sample.lastIndexOf([42]), -1, "[42]"); assert.sameValue(sample.lastIndexOf(42.0), 0, "42.0"); assert.sameValue(sample.lastIndexOf(-0), 3, "-0"); assert.sameValue(sample.lastIndexOf(true), -1, "true"); assert.sameValue(sample.lastIndexOf(false), -1, "false"); assert.sameValue(sample.lastIndexOf(NaN), -1, "NaN === NaN is false"); assert.sameValue(sample.lastIndexOf(null), -1, "null"); assert.sameValue(sample.lastIndexOf(undefined), -1, "undefined"); assert.sameValue(sample.lastIndexOf(""), -1, "empty string"); }); reportCompare(0, 0);