Add DeviceEventRouter class.

chrome/browser/chromeos/extensions/file_manager/device_event_router_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 "chrome/browser/chromeos/extensions/file_manager/device_event_router.h"
+
+#include <string>
+#include <vector>
+
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "chrome/browser/chromeos/file_manager/volume_manager.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace file_manager {
+namespace {
+
+namespace file_browser_private = extensions::api::file_browser_private;
+typedef chromeos::disks::DiskMountManager::Disk Disk;
+
+const char kTestDevicePath[] = "/device/test";
+
+struct DeviceEvent {
+  extensions::api::file_browser_private::DeviceEventType type;
+  std::string device_path;
+};
+
+// DeviceEventRouter implementation for testing.
+class DeviceEventRouterImpl : public DeviceEventRouter {
+ public:
+  DeviceEventRouterImpl()
+      : DeviceEventRouter(/* zero_time_delta */ true),
+        external_storage_disabled(false) {}
+  virtual ~DeviceEventRouterImpl() {}
+
+  // Override
+  virtual void OnDeviceEvent(file_browser_private::DeviceEventType type,
+                             const std::string& device_path) OVERRIDE {
+    DeviceEvent event;
+    event.type = type;
+    event.device_path = device_path;
+    events.push_back(event);
+  }
+
+  // Override
+  virtual bool IsExternalStorageDisabled() OVERRIDE {
+    return external_storage_disabled;
+  }
+
+  // List of dispatched events.
+  std::vector<DeviceEvent> events;
+
+  // Flag returned by |IsExternalStorageDisabled|.
+  bool external_storage_disabled;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DeviceEventRouterImpl);
+};
+}  // namespace
+
+class DeviceEventRouterTest : public testing::Test {
+ protected:
+  virtual void SetUp() OVERRIDE {
+    device_event_router.reset(new DeviceEventRouterImpl());
+  }
+
+  // Creates a disk instance with |device_path| and |mount_path| for testing.
+  Disk CreateTestDisk(const std::string& device_path,
+                      const std::string& mount_path) {
+    return Disk(device_path,
+                mount_path,
+                "",
+                "",
+                "",
+                "",
+                "",
+                "",
+                "",
+                "",
+                "",
+                device_path,
+                chromeos::DEVICE_TYPE_UNKNOWN,
+                0,
+                false,
+                false,
+                false,
+                false,
+                false,
+                false);
+  }
+
+  // Creates a volume info instance with |device_path| and |mount_path| for
+  // testing.
+  VolumeInfo CreateTestVolumeInfo(const std::string& device_path,
+                                  const std::string& mount_path) {
+    VolumeInfo volume_info;
+    volume_info.system_path_prefix = base::FilePath(device_path);
+    volume_info.mount_path = base::FilePath(mount_path);
+    return volume_info;
+  }
+
+  scoped_ptr<DeviceEventRouterImpl> device_event_router;
+
+ private:
+  base::MessageLoop message_loop_;
+};
+
+TEST_F(DeviceEventRouterTest, AddAndRemoveDevice) {
+  const Disk disk1 = CreateTestDisk("/device/test", "/mount/path1");
+  const Disk disk1_unmounted = CreateTestDisk("/device/test", "");
+  const VolumeInfo volumeInfo =
+      CreateTestVolumeInfo("/device/test", "/mount/path1");
+  device_event_router->OnDeviceAdded("/device/test");
+  device_event_router->OnDiskAdded(disk1, true);
+  device_event_router->OnVolumeMounted(
+      chromeos::MOUNT_ERROR_NONE, volumeInfo, false);
+  device_event_router->OnVolumeUnmounted(chromeos::MOUNT_ERROR_NONE,
+                                         volumeInfo);
+  device_event_router->OnDiskRemoved(disk1_unmounted);
+  device_event_router->OnDeviceRemoved("/device/test");
+  EXPECT_EQ(1u, device_event_router->events.size());
+  EXPECT_EQ(file_browser_private::DEVICE_EVENT_TYPE_REMOVED,
+            device_event_router->events[0].type);
+  EXPECT_EQ("/device/test", device_event_router->events[0].device_path);
+}
+
+TEST_F(DeviceEventRouterTest, DeviceScan) {
+  const Disk disk = CreateTestDisk("/device/test", "/mount/path1");
+  const Disk disk_unmounted = CreateTestDisk("/device/test", "");
+  const VolumeInfo volumeInfo =
+      CreateTestVolumeInfo("/device/test", "/mount/path1");
+  device_event_router->OnDeviceAdded("/device/test");
+  base::RunLoop().RunUntilIdle();
+  device_event_router->OnDiskAdded(disk, true);
+  device_event_router->OnVolumeMounted(
+      chromeos::MOUNT_ERROR_NONE, volumeInfo, false);
+  device_event_router->OnVolumeUnmounted(chromeos::MOUNT_ERROR_NONE,
+                                         volumeInfo);
+  device_event_router->OnDiskRemoved(disk_unmounted);
+  device_event_router->OnDeviceRemoved("/device/test");
+  EXPECT_EQ(2u, device_event_router->events.size());
+  EXPECT_EQ(file_browser_private::DEVICE_EVENT_TYPE_ADDED,
+            device_event_router->events[0].type);
+  EXPECT_EQ("/device/test", device_event_router->events[0].device_path);
+  EXPECT_EQ(file_browser_private::DEVICE_EVENT_TYPE_REMOVED,
+            device_event_router->events[1].type);
+  EXPECT_EQ("/device/test", device_event_router->events[1].device_path);
+}
+
+TEST_F(DeviceEventRouterTest, DeviceScanCancelled) {
+  const Disk disk = CreateTestDisk("/device/test", "/mount/path1");
+  const Disk disk_unmounted = CreateTestDisk("/device/test", "");
+  const VolumeInfo volumeInfo =
+      CreateTestVolumeInfo("/device/test", "/mount/path1");
+  device_event_router->OnDeviceAdded("/device/test");
+  base::RunLoop().RunUntilIdle();
+  device_event_router->OnDiskAdded(disk, false);
+  device_event_router->OnDiskRemoved(disk_unmounted);
+  device_event_router->OnDeviceRemoved("/device/test");
+  EXPECT_EQ(3u, device_event_router->events.size());
+  EXPECT_EQ(file_browser_private::DEVICE_EVENT_TYPE_ADDED,
+            device_event_router->events[0].type);
+  EXPECT_EQ("/device/test", device_event_router->events[0].device_path);
+  EXPECT_EQ(file_browser_private::DEVICE_EVENT_TYPE_SCAN_CANCELED,
+            device_event_router->events[1].type);
+  EXPECT_EQ("/device/test", device_event_router->events[1].device_path);
+  EXPECT_EQ(file_browser_private::DEVICE_EVENT_TYPE_REMOVED,
+            device_event_router->events[2].type);
+  EXPECT_EQ("/device/test", device_event_router->events[2].device_path);
+}
+
+TEST_F(DeviceEventRouterTest, HardUnplugged) {
+  const Disk disk1 = CreateTestDisk("/device/test", "/mount/path1");
+  const Disk disk2 = CreateTestDisk("/device/test", "/mount/path2");
+  device_event_router->OnDeviceAdded("/device/test");
+  device_event_router->OnDiskAdded(disk1, true);
+  device_event_router->OnDiskAdded(disk2, true);
+  device_event_router->OnDiskRemoved(disk1);
+  device_event_router->OnDiskRemoved(disk2);
+  device_event_router->OnDeviceRemoved(kTestDevicePath);
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(2u, device_event_router->events.size());
+  EXPECT_EQ(file_browser_private::DEVICE_EVENT_TYPE_HARD_UNPLUGGED,
+            device_event_router->events[0].type);
+  EXPECT_EQ("/device/test", device_event_router->events[0].device_path);
+  EXPECT_EQ(file_browser_private::DEVICE_EVENT_TYPE_REMOVED,
+            device_event_router->events[1].type);
+  EXPECT_EQ("/device/test", device_event_router->events[1].device_path);
+}
+
+}  // namespace file_manager