Update tests for TypedArrays foreach and map

Based on the feedback from gh-593

test/built-ins/TypedArray/prototype/forEach/callbackfn-no-interaction-over-non-integer.js

@@ -27,8 +27,8 @@ testWithTypedArrayConstructors(function(TA) {
   sample.foo = 42;
   sample[Symbol("1")] = 43;
 
-  sample.forEach(function(v, i) {
-    results.push([v, i]);
+  sample.forEach(function() {
+    results.push(arguments);
   });
 
   assert.sameValue(results.length, 2, "results.length");

test/built-ins/TypedArray/prototype/forEach/values-are-not-cached.js

@@ -0,0 +1,30 @@
+// 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.foreach
+description: >
+  Integer indexed values are not cached before interaction
+info: >
+  22.2.3.12 %TypedArray%.prototype.forEach ( callbackfn [ , thisArg ] )
+
+  %TypedArray%.prototype.forEach is a distinct function that implements the same
+  algorithm as Array.prototype.forEach as defined in 22.1.3.10 except that the
+  this object's [[ArrayLength]] internal slot is accessed in place of performing
+  a [[Get]] of "length"
+includes: [testTypedArray.js]
+---*/
+
+testWithTypedArrayConstructors(function(TA) {
+  var sample = new TA([42, 43, 44]);
+
+  sample.forEach(function(v, i) {
+    if (i < sample.length - 1) {
+      sample[i+1] = 42;
+    }
+
+    assert.sameValue(
+      v, 42, "method does not cache values before callbackfn calls"
+    );
+  });
+});

test/built-ins/TypedArray/prototype/map/callbackfn-no-interaction-over-non-integer-properties.js

@@ -26,8 +26,8 @@ testWithTypedArrayConstructors(function(TA) {
   sample.foo = 42;
   sample[Symbol("1")] = 43;
 
-  sample.map(function(v, i) {
-    results.push([v, i]);
+  sample.map(function() {
+    results.push(arguments);
   });
 
   assert.sameValue(results.length, 2, "results.length");

test/built-ins/TypedArray/prototype/map/values-are-not-cached.js

@@ -0,0 +1,25 @@
+// 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.map
+description: >
+  Integer indexed values changed during iteration
+info: >
+  22.2.3.19 %TypedArray%.prototype.map ( callbackfn [ , thisArg ] )
+includes: [testTypedArray.js]
+---*/
+
+testWithTypedArrayConstructors(function(TA) {
+  var sample = new TA([42, 43, 44]);
+
+  sample.map(function(v, i) {
+    if (i < sample.length - 1) {
+      sample[i+1] = 42;
+    }
+
+    assert.sameValue(
+      v, 42, "method does not cache values before callbackfn calls"
+    );
+  });
+});