[typedarrays] move %TypedArray%.prototype.copyWithin to C++

test/mjsunit/es6/typedarray-copywithin.js

Index: test/mjsunit/es6/typedarray-copywithin.js
diff --git a/test/mjsunit/es6/typedarray-copywithin.js b/test/mjsunit/es6/typedarray-copywithin.js
index ad5a0df5639b1e8724fa5ac70c0f7e4eb2dbe2ec..3f87eb88cbd32385f2532c14abd35cd735de1919 100644
--- a/test/mjsunit/es6/typedarray-copywithin.js
+++ b/test/mjsunit/es6/typedarray-copywithin.js
@@ -171,3 +171,57 @@ CheckEachTypedArray(function copyWithinNullEnd(constructor) {
   assertArrayEquals([1, 2, 3, 4, 5],
                     new constructor([1, 2, 3, 4, 5]).copyWithin(0, 3, null));
 });
+
+
+CheckEachTypedArray(function copyWithinMinusInfinityTarget(constructor) {
+  var arr = new constructor([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+  var expected = [6, 7, 8, 9, 10, 6, 7, 8, 9, 10];
+
+  assertArrayEquals(expected, arr.copyWithin(-Infinity, 5));
+  assertEquals(10, arr.length);
+});
+
+
+CheckEachTypedArray(function copyWithinPositiveInfinityTarget(constructor) {
+  var arr = new constructor([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+  var expected = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+
+  assertArrayEquals(expected, arr.copyWithin(+Infinity, 5));
+  assertEquals(10, arr.length);
+});
+
+
+CheckEachTypedArray(function copyWithinMinusInfinityStart(constructor) {
+  var arr = new constructor([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+  var expected = [1, 2, 3, 4, 5, 1, 2, 3, 4, 5];
+
+  assertArrayEquals(expected, arr.copyWithin(5, -Infinity));
+  assertEquals(10, arr.length);
+});
+
+
+CheckEachTypedArray(function copyWithinPositiveInfinityStart(constructor) {
+  var arr = new constructor([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+  var expected = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+
+  assertArrayEquals(expected, arr.copyWithin(5, +Infinity));
+  assertEquals(10, arr.length);
+});
+
+
+CheckEachTypedArray(function copyWithinMinusInfinityEnd(constructor) {
+  var arr = new constructor([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+  var expected = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+
+  assertArrayEquals(expected, arr.copyWithin(5, 0, -Infinity));
+  assertEquals(10, arr.length);
+});
+
+
+CheckEachTypedArray(function copyWithinPositiveInfinityEnd(constructor) {
+var arr = new constructor([1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);
+  var expected = [1, 2, 3, 4, 5, 1, 2, 3, 4, 5];
+
+  assertArrayEquals(expected, arr.copyWithin(5, 0, +Infinity));
+  assertEquals(10, arr.length);
+});