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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.copywithin
+description: >
+ Copy values with non-negative target and start positions.
+info: |
+ 22.2.3.5 %TypedArray%.prototype.copyWithin (target, start [ , end ] )
+
+ %TypedArray%.prototype.copyWithin is a distinct function that implements the
+ same algorithm as Array.prototype.copyWithin as defined in 22.1.3.3 except
+ that the this object's [[ArrayLength]] internal slot is accessed in place of
+ performing a [[Get]] of "length" and the actual copying of values in step 12
+ must be performed in a manner that preserves the bit-level encoding of the
+ source data.
+
+ ...
+includes: [compareArray.js, testTypedArray.js]
+features: [TypedArray]
+---*/
+
+testWithTypedArrayConstructors(function(TA) {
+ assert(
+ compareArray(
+ new TA([1, 2, 3, 4, 5, 6]).copyWithin(0, 0),
+ [1, 2, 3, 4, 5, 6]
+ )
+ );
+
+ assert(
+ compareArray(
+ new TA([1, 2, 3, 4, 5, 6]).copyWithin(0, 2),
+ [3, 4, 5, 6, 5, 6]
+ )
+ );
+
+ assert(
+ compareArray(
+ new TA([1, 2, 3, 4, 5, 6]).copyWithin(3, 0),
+ [1, 2, 3, 1, 2, 3]
+ )
+ );
+
+ assert(
+ compareArray(
+ new TA([0, 1, 2, 3, 4, 5]).copyWithin(1, 4),
+ [0, 4, 5, 3, 4, 5]
+ )
+ );
+});
+
+reportCompare(0, 0);