Make one copy for all TypedArray methods

test/mjsunit/harmony/typedarray-proto.js

+// Copyright 2015 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.
+
+// Flags: --harmony-arrays
+
+// Test that the methods for different TypedArray types have the same
+// identity.
+// TODO(dehrenberg): Test that the TypedArray proto hierarchy is set
+// up properly.
+
+var typedArrayConstructors = [
+  Uint8Array,
+  Int8Array,
+  Uint16Array,
+  Int16Array,
+  Uint32Array,
+  Int32Array,
+  Uint8ClampedArray,
+  Float32Array,
+  Float64Array];
+
+function functionProperties(object) {
+  return Object.getOwnPropertyNames(object).filter(function(name) {
+    return typeof Object.getOwnPropertyDescriptor(object, name).value
+        == "function"
+      && name != 'constructor' && name != 'subarray';
+  });
+}
+
+var typedArrayMethods = functionProperties(Uint8Array.prototype);
+var typedArrayClassMethods = functionProperties(Uint8Array);
+
+function allEqual(arr) {
+  return arr.length == 0 || arr.every(function(x) {return x === arr[0];});
+}
+
+for (var method of typedArrayMethods) {
+  assertEquals(true, allEqual(
+               typedArrayConstructors.map(function(constructor) {

[arv (Not doing code reviews), 2015/05/08 20:02:03]

maybe a nested loop would be cleaner?

for (var method of typedArrayMethods) {
  for (var constructor of typedArrayConstructors) {
    assertEqual(Uint8Array.prototype[method],
                constructor.prototype[method]);
  }
}

+                 return constructor.prototype[method];
+               })), method);
+}
+
+for (var classMethod of typedArrayClassMethods) {
+  assertEquals(true,
+               allEqual(typedArrayConstructors.map(function(constructor) {
+                 return constructor[method];
+               })), classMethod)
+}