[usb_gadget p12] Basic tests of usb_service using the USB test gadget.

device/usb/usb_service_unittest.cc

+// 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.
+
+#include "base/message_loop/message_loop.h"
+#include "base/strings/utf_string_conversions.h"
+#include "components/usb_service/usb_device.h"
+#include "components/usb_service/usb_device_handle.h"
+#include "device/test/usb_test_gadget.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using ::usb_service::UsbDeviceHandle;
+
+namespace device {
+
+namespace {
+
+class UsbServiceTest : public ::testing::Test {
+ public:
+  virtual void SetUp() {
+    message_loop_.reset(new base::MessageLoopForIO);
+  }
+
+ private:
+  scoped_ptr<base::MessageLoop> message_loop_;
+};
+
+TEST_F(UsbServiceTest, ClaimGadget) {
+  if (!UsbTestGadget::IsTestEnabled()) return;
+
+  scoped_ptr<UsbTestGadget> gadget = UsbTestGadget::Claim();
+  ASSERT_TRUE(gadget.get());
+
+  scoped_refptr<UsbDeviceHandle> handle = gadget->GetDevice()->Open();
+  base::string16 serial_utf16;
+  ASSERT_TRUE(handle->GetSerial(&serial_utf16));
+  ASSERT_EQ(gadget->GetSerial(), base::UTF16ToUTF8(serial_utf16));
+}
+
+TEST_F(UsbServiceTest, DisconnectAndReconnect) {
+  if (!UsbTestGadget::IsTestEnabled()) return;
+
+  scoped_ptr<UsbTestGadget> gadget = UsbTestGadget::Claim();
+  ASSERT_TRUE(gadget.get());
+  ASSERT_TRUE(gadget->Disconnect());
+  ASSERT_TRUE(gadget->Reconnect());
+}
+
+}  // namespace
+
+}  // namespace device