Make one copy for all TypedArray methods

test/mjsunit/harmony/typedarray-proto.js

Index: test/mjsunit/harmony/typedarray-proto.js
diff --git a/test/mjsunit/harmony/typedarray-proto.js b/test/mjsunit/harmony/typedarray-proto.js
new file mode 100644
index 0000000000000000000000000000000000000000..bf18fdf82cf4b5c380a3014919417247e2520748
--- /dev/null
+++ b/test/mjsunit/harmony/typedarray-proto.js
@@ -0,0 +1,48 @@
+// Copyright 2014 the V8 project authors. All rights reserved.

[adamk, 2015/05/08 01:13:34]

Nit: update date to 2015 when adding new tests

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-arrays --harmony_arrow_functions

[adamk, 2015/05/08 01:13:34]

Arrow functions aren't far enough along to be relied upon in tests yet, please
only use flags to turn on features you're testing directly.

+
+// 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(
+    name => typeof Object.getOwnPropertyDescriptor(object, name).value
+              == "function" && name != 'constructor');
+}
+
+var typedArrayMethods = functionProperties(Uint8Array.prototype);
+var typedArrayClassMethods = functionProperties(Uint8Array);
+
+function allEqual(arr) {
+  return arr.length == 0 || arr.every(x => x === arr[0]);
+}
+
+for (var method of typedArrayMethods) {
+  assertEquals(true, allEqual(
+               typedArrayConstructors.map(constructor =>
+                                          constructor.prototype[method])),
+               method)
+}
+
+for (var classMethod of typedArrayClassMethods) {
+  assertEquals(true,
+               allEqual(typedArrayConstructors.map(constructor =>
+                                                   constructor[method])),
+               classMethod)
+}