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+// 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: returns index for the first found element
+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 ] )
+
+ ...
+ 5. If n ≥ 0, then
+ a. If n is -0, let k be +0; else let k be min(n, len - 1).
+ 6. Else n < 0,
+ a. Let k be len + n.
+ 7. Repeat, while k ≥ 0
+ a. Let kPresent be ? HasProperty(O, ! ToString(k)).
+ 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, 43, 42, 41]);
+ assert.sameValue(sample.lastIndexOf(42), 2, "lastIndexOf(42)");
+ assert.sameValue(sample.lastIndexOf(43), 1, "lastIndexOf(43)");
+ assert.sameValue(sample.lastIndexOf(41), 3, "lastIndexOf(41)");
+ assert.sameValue(sample.lastIndexOf(41, 3), 3, "lastIndexOf(41, 3)");
+ assert.sameValue(sample.lastIndexOf(41, 4), 3, "lastIndexOf(41, 4)");
+ assert.sameValue(sample.lastIndexOf(43, 1), 1, "lastIndexOf(43, 1)");
+ assert.sameValue(sample.lastIndexOf(43, 2), 1, "lastIndexOf(43, 2)");
+ assert.sameValue(sample.lastIndexOf(43, 3), 1, "lastIndexOf(43, 3)");
+ assert.sameValue(sample.lastIndexOf(43, 4), 1, "lastIndexOf(43, 4)");
+ assert.sameValue(sample.lastIndexOf(42, 0), 0, "lastIndexOf(42, 0)");
+ assert.sameValue(sample.lastIndexOf(42, 1), 0, "lastIndexOf(42, 1)");
+ assert.sameValue(sample.lastIndexOf(42, 2), 2, "lastIndexOf(42, 2)");
+ assert.sameValue(sample.lastIndexOf(42, 3), 2, "lastIndexOf(42, 3)");
+ assert.sameValue(sample.lastIndexOf(42, 4), 2, "lastIndexOf(42, 4)");
+ assert.sameValue(sample.lastIndexOf(42, -4), 0, "lastIndexOf(42, -4)");
+ assert.sameValue(sample.lastIndexOf(42, -3), 0, "lastIndexOf(42, -3)");
+ assert.sameValue(sample.lastIndexOf(42, -2), 2, "lastIndexOf(42, -2)");
+ assert.sameValue(sample.lastIndexOf(42, -1), 2, "lastIndexOf(42, -1)");
+ assert.sameValue(sample.lastIndexOf(43, -3), 1, "lastIndexOf(43, -3)");
+ assert.sameValue(sample.lastIndexOf(43, -2), 1, "lastIndexOf(43, -2)");
+ assert.sameValue(sample.lastIndexOf(43, -1), 1, "lastIndexOf(43, -1)");
+ assert.sameValue(sample.lastIndexOf(41, -1), 3, "lastIndexOf(41, -1)");
+});
+
+reportCompare(0, 0);