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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, start and end 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, testBigIntTypedArray.js]
+features: [BigInt, TypedArray]
+---*/
+
+testWithBigIntTypedArrayConstructors(function(TA) {
+ assert(
+ compareArray(
+ new TA([0n, 1n, 2n, 3n]).copyWithin(0, 0, 0),
+ [0n, 1n, 2n, 3n]
+ ),
+ '[0, 1, 2, 3].copyWithin(0, 0, 0) -> [0, 1, 2, 3]'
+ );
+
+ assert(
+ compareArray(
+ new TA([0n, 1n, 2n, 3n]).copyWithin(0, 0, 2),
+ [0n, 1n, 2n, 3n]
+ ),
+ '[0, 1, 2, 3].copyWithin(0, 0, 2) -> [0, 1, 2, 3]'
+ );
+
+ assert(
+ compareArray(
+ new TA([0n, 1n, 2n, 3n]).copyWithin(0, 1, 2),
+ [1n, 1n, 2n, 3n]
+ ),
+ '[0, 1, 2, 3].copyWithin(0, 1, 2) -> [1, 1, 2, 3]'
+ );
+
+ /*
+ * 10. If from<to and to<from+count, then
+ * a. Let direction be - 1.
+ * b. Let from be from + count - 1.
+ * c. Let to be to + count - 1.
+ *
+ * 0 < 1, 1 < 0 + 2
+ * direction = -1
+ * from = 0 + 2 - 1
+ * to = 1 + 2 - 1
+ */
+ assert(
+ compareArray(
+ new TA([0n, 1n, 2n, 3n]).copyWithin(1, 0, 2),
+ [0n, 0n, 1n, 3n]
+ ),
+ '[0, 1, 2, 3].copyWithin(1, 0, 2) -> [0, 0, 1, 3]'
+ );
+
+ assert(
+ compareArray(
+ new TA([0n, 1n, 2n, 3n, 4n, 5n]).copyWithin(1, 3, 5),
+ [0n, 3n, 4n, 3n, 4n, 5n]
+ ),
+ '[0, 1, 2, 3, 4, 5].copyWithin(1, 3, 5) -> [0, 3, 4, 3, 4, 5]'
+ );
+});
+
+reportCompare(0, 0);