Introducing chrome.usb.getDevices/openDevice API

chrome/test/data/extensions/api_test/usb/reset_device/test.js

+// Copyright (c) 2013 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 usb = chrome.usb;
+
+function resetDevice() {
+  usb.findDevices({vendorId: 0, productId: 0}, function(devices) {
+    usb.resetDevice(devices[0], function(result) {
+      chrome.test.assertEq(result, true);
+      // Ensure the device is still open.
+      var transfer = {
+        direction: "out",
+        endpoint: 2,
+        data: new ArrayBuffer(1)
+      };
+      usb.interruptTransfer(devices[0], transfer, function(result) {
+        // This is designed to fail.
+        usb.resetDevice(devices[0], function(result) {
+          chrome.test.assertEq(result, false);
+          usb.interruptTransfer(devices[0], transfer, function(result) {
+            chrome.test.assertEq(result, undefined);
+            chrome.test.assertEq(
+                chrome.runtime.lastError && chrome.runtime.lastError.message,
+                'No such device.'
+            );
+            chrome.test.succeed();
+          });
+        });
+      });
+    });
+  });
+}
+
+chrome.test.runTests([resetDevice]);