chrome.bluetoothLowEnergy: Implement writeDescriptorValue.

chrome/test/data/extensions/api_test/bluetooth_low_energy/write_descriptor_value/runtest.js

Index: chrome/test/data/extensions/api_test/bluetooth_low_energy/write_descriptor_value/runtest.js
diff --git a/chrome/test/data/extensions/api_test/bluetooth_low_energy/write_descriptor_value/runtest.js b/chrome/test/data/extensions/api_test/bluetooth_low_energy/write_descriptor_value/runtest.js
new file mode 100644
index 0000000000000000000000000000000000000000..ca687b10d375ec87d3c01bfb338a91379985ce0c
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/bluetooth_low_energy/write_descriptor_value/runtest.js
@@ -0,0 +1,57 @@
+// Copyright 2014 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.
+
+function testWriteDescriptorValue() {
+  chrome.test.assertTrue(descriptor != null, '\'descriptor\' is null');
+  chrome.test.assertEq(descId, descriptor.instanceId);
+
+  chrome.test.assertEq(writeValue.byteLength, descriptor.value.byteLength);
+
+  var receivedValueBytes = new Uint8Array(descriptor.value);
+  for (var i = 0; i < writeValue.byteLength; i++) {
+    chrome.test.assertEq(valueBytes[i], receivedValueBytes[i]);
+  }
+
+  chrome.test.succeed();
+}
+
+var writeDescriptorValue = chrome.bluetoothLowEnergy.writeDescriptorValue;
+var descId = 'desc_id0';
+var badDescId = 'desc_id1';
+
+var descriptor = null;
+
+var bytes = [0x43, 0x68, 0x72, 0x6F, 0x6D, 0x65];
+var writeValue = new ArrayBuffer(bytes.length);
+var valueBytes = new Uint8Array(writeValue);
+valueBytes.set(bytes);
+
+// 1. Unknown descriptor instanceId.
+writeDescriptorValue(badDescId, writeValue, function (result) {
+  if (result || !chrome.runtime.lastError) {
+    chrome.test.fail('\'badDescId\' did not cause failure');
+  }
+
+  // 2. Known descriptor instanceId, but call failure.
+  writeDescriptorValue(descId, writeValue, function (result) {
+    if (result || !chrome.runtime.lastError) {
+      chrome.test.fail('writeDescriptorValue should have failed');
+    }
+
+    // 3. Call should succeed.
+    writeDescriptorValue(descId, writeValue, function (result) {
+      if (chrome.runtime.lastError) {
+        chrome.test.fail(chrome.runtime.lastError.message);
+      }
+
+      chrome.bluetoothLowEnergy.getDescriptor(descId, function (result) {
+        descriptor = result;
+
+        chrome.test.sendMessage('ready', function (message) {
+          chrome.test.runTests([testWriteDescriptorValue]);
+        });
+      });
+    });
+  });
+});