Allow serialization of ArrayBuffer params in extension/apps API methods

chrome/test/data/extensions/api_test/idltest/binary_data/binary.js

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var assertEq = chrome.test.assertEq;
+var assertTrue = chrome.test.assertTrue;
+var callbackPass = chrome.test.callbackPass;
+
+function makeCompareCallback(buf) {
+  return function(array) {
+    assertEq(buf.byteLength, array.length);
+    for (var i = 0; i < buf.length; i++) {
+      assertEq(buf[i], array[i]);
+    }
+  };
+}
+
+function makeBuffer() {
+  var bufferSize = 128;
+  var ab = new ArrayBuffer(bufferSize);
+  var view = new Uint8Array(ab);
+  for (var i = 0; i < bufferSize; i++) {
+    view[i] = i+3;
+  }
+  return view;
+}
+
+var tests = [
+  function sendBuffer() {
+    var view = makeBuffer();
+    chrome.experimental.idltest.sendArrayBuffer(
+        view.buffer, callbackPass(makeCompareCallback(view.buffer)));
+  },
+
+  function sendBufferView() {
+    var view = makeBuffer();
+    chrome.experimental.idltest.sendArrayBufferView(
+        view, callbackPass(makeCompareCallback(view.buffer)));
+  },
+
+  function sendBufferSlice() {
+    var view = makeBuffer();
+    var bufferSlice = view.buffer.slice(64);
+    assertEq(64, bufferSlice.byteLength);
+    chrome.experimental.idltest.sendArrayBuffer(
+        bufferSlice, callbackPass(makeCompareCallback(bufferSlice)));
+  },
+
+  function getBuffer() {
+    chrome.experimental.idltest.getArrayBuffer(callbackPass(function(buffer) {
+      assertTrue(buffer.__proto__ == (new ArrayBuffer()).__proto__);
+      var view = new Uint8Array(buffer);
+      var expected = "hello world";
+      assertEq(view.byteLength, expected.length);
+      for (var i = 0; i < view.byteLength; i++) {
+        assertTrue(expected[i] == String.fromCharCode(view[i]));
+      }
+    }));
+  }
+];
+
+chrome.test.runTests(tests);