[typedarrays] Use internal byteOffset in TypedArray.prototype.set

test/test262/local-tests/test/built-ins/TypedArray/prototype/set/typedarray-arg-target-byteoffset-internal.js

Index: test/test262/local-tests/test/built-ins/TypedArray/prototype/set/typedarray-arg-target-byteoffset-internal.js
diff --git a/test/test262/local-tests/test/built-ins/TypedArray/prototype/set/typedarray-arg-target-byteoffset-internal.js b/test/test262/local-tests/test/built-ins/TypedArray/prototype/set/typedarray-arg-target-byteoffset-internal.js
new file mode 100644
index 0000000000000000000000000000000000000000..ab49f66a983b85fa4510419032dafbe4a0b80fdb
--- /dev/null
+++ b/test/test262/local-tests/test/built-ins/TypedArray/prototype/set/typedarray-arg-target-byteoffset-internal.js
@@ -0,0 +1,44 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+/*---
+esid: sec-%typedarray%.prototype.set-typedarray-offset
+description: >
+  Uses target's internal [[ArrayLength]]
+info: >
+  22.2.3.23.2 %TypedArray%.prototype.set(typedArray [ , offset ] )
+  1. Assert: typedArray has a [[TypedArrayName]] internal slot. If it does not,
+  the definition in 22.2.3.23.1 applies.
+  2. Let target be the this value.
+  ...
+  16. Let targetByteOffset be target.[[ByteOffset]].
+  ...
+includes: [testTypedArray.js]
+---*/
+
+var getCalls = 0;
+var desc = {
+  get: function() {
+    getCalls++;
+    return 0;
+  }
+};
+
+Object.defineProperty(TypedArray.prototype, "byteOffset", desc);
+
+testWithTypedArrayConstructors(function(TA) {
+  var sample = new TA(2);
+  var src = new TA([42, 43]);
+  var differentTA = TA === Uint8Array ? Int8Array : Uint8Array;
+  var src2 = new differentTA([42, 43]);
+  var src3 = new differentTA(sample.buffer, 0, 2);
+
+  Object.defineProperty(TA.prototype, "byteOffset", desc);
+  Object.defineProperty(sample, "byteOffset", desc);
+
+  sample.set(src);
+  sample.set(src2);
+  sample.set(src3);
+
+  assert.sameValue(getCalls, 0, "ignores byteoffset properties");
+});