src/chromeos/disks/disk_mount_manager_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/bind.h"
   6 #include "base/message_loop/message_loop.h"
   7 #include "chromeos/dbus/fake_cros_disks_client.h"
   8 #include "chromeos/dbus/fake_dbus_thread_manager.h"
   9 #include "chromeos/disks/disk_mount_manager.h"
  10 #include "testing/gmock/include/gmock/gmock.h"
  11 #include "testing/gtest/include/gtest/gtest.h"
  12
  13 using chromeos::disks::DiskMountManager;
  14 using chromeos::CrosDisksClient;
  15 using chromeos::DBusThreadManager;
  16 using chromeos::FakeCrosDisksClient;
  17 using chromeos::FakeDBusThreadManager;
  18 using testing::_;
  19 using testing::Field;
  20 using testing::InSequence;
  21
  22 namespace {
  23
  24 // Holds information needed to create a DiskMountManager::Disk instance.
  25 struct TestDiskInfo {
  26   const char* source_path;
  27   const char* mount_path;
  28   const char* system_path;
  29   const char* file_path;
  30   const char* device_label;
  31   const char* drive_label;
  32   const char* vendor_id;
  33   const char* vendor_name;
  34   const char* product_id;
  35   const char* product_name;
  36   const char* fs_uuid;
  37   const char* system_path_prefix;
  38   chromeos::DeviceType device_type;
  39   uint64 size_in_bytes;
  40   bool is_parent;
  41   bool is_read_only;
  42   bool has_media;
  43   bool on_boot_device;
  44   bool on_removable_device;
  45   bool is_hidden;
  46 };
  47
  48 // Holds information to create a DiskMOuntManager::MountPointInfo instance.
  49 struct TestMountPointInfo {
  50   const char* source_path;
  51   const char* mount_path;
  52   chromeos::MountType mount_type;
  53   chromeos::disks::MountCondition mount_condition;
  54 };
  55
  56 // List of disks held in DiskMountManager at the begining of the test.
  57 const TestDiskInfo kTestDisks[] = {
  58   {
  59     "/device/source_path",
  60     "/device/mount_path",
  61     "/device/prefix/system_path",
  62     "/device/file_path",
  63     "/device/device_label",
  64     "/device/drive_label",
  65     "/device/vendor_id",
  66     "/device/vendor_name",
  67     "/device/product_id",
  68     "/device/product_name",
  69     "/device/fs_uuid",
  70     "/device/prefix",
  71     chromeos::DEVICE_TYPE_USB,
  72     1073741824,  // size in bytes
  73     false,  // is parent
  74     false,  // is read only
  75     true,  // has media
  76     false,  // is on boot device
  77     true,  // is on removable device
  78     false  // is hidden
  79   },
  80 };
  81
  82 // List of mount points  held in DiskMountManager at the begining of the test.
  83 const TestMountPointInfo kTestMountPoints[] = {
  84   {
  85     "/archive/source_path",
  86     "/archive/mount_path",
  87     chromeos::MOUNT_TYPE_ARCHIVE,
  88     chromeos::disks::MOUNT_CONDITION_NONE
  89   },
  90   {
  91     "/device/source_path",
  92     "/device/mount_path",
  93     chromeos::MOUNT_TYPE_DEVICE,
  94     chromeos::disks::MOUNT_CONDITION_NONE
  95   },
  96 };
  97
  98 // Mocks DiskMountManager observer.
  99 class MockDiskMountManagerObserver : public DiskMountManager::Observer {
 100  public:
 101   virtual ~MockDiskMountManagerObserver() {}
 102
 103   MOCK_METHOD2(OnDiskEvent, void(DiskMountManager::DiskEvent event,
 104                                  const DiskMountManager::Disk* disk));
 105   MOCK_METHOD2(OnDeviceEvent, void(DiskMountManager::DeviceEvent event,
 106                                    const std::string& device_path));
 107   MOCK_METHOD3(OnMountEvent,
 108       void(DiskMountManager::MountEvent event,
 109            chromeos::MountError error_code,
 110            const DiskMountManager::MountPointInfo& mount_point));
 111   MOCK_METHOD3(OnFormatEvent,
 112       void(DiskMountManager::FormatEvent event,
 113            chromeos::FormatError error_code,
 114            const std::string& device_path));
 115 };
 116
 117 class DiskMountManagerTest : public testing::Test {
 118  public:
 119   DiskMountManagerTest() {}
 120   virtual ~DiskMountManagerTest() {}
 121
 122   // Sets up test dbus tread manager and disks mount manager.
 123   // Initializes disk mount manager disks and mount points.
 124   // Adds a test observer to the disk mount manager.
 125   virtual void SetUp() {
 126     FakeDBusThreadManager* fake_thread_manager = new FakeDBusThreadManager();
 127     fake_cros_disks_client_ = new FakeCrosDisksClient;
 128     fake_thread_manager->SetCrosDisksClient(
 129         scoped_ptr<CrosDisksClient>(fake_cros_disks_client_));
 130
 131     DBusThreadManager::InitializeForTesting(fake_thread_manager);
 132
 133     DiskMountManager::Initialize();
 134
 135     InitDisksAndMountPoints();
 136
 137     DiskMountManager::GetInstance()->AddObserver(&observer_);
 138   }
 139
 140   // Shuts down dbus thread manager and disk moutn manager used in the test.
 141   virtual void TearDown() {
 142     DiskMountManager::GetInstance()->RemoveObserver(&observer_);
 143     DiskMountManager::Shutdown();
 144     DBusThreadManager::Shutdown();
 145   }
 146
 147  protected:
 148   // Checks if disk mount manager contains a mount point with specified moutn
 149   // path.
 150   bool HasMountPoint(const std::string& mount_path) {
 151     const DiskMountManager::MountPointMap& mount_points =
 152         DiskMountManager::GetInstance()->mount_points();
 153     return mount_points.find(mount_path) != mount_points.end();
 154   }
 155
 156  private:
 157   // Adds a new disk to the disk mount manager.
 158   void AddTestDisk(const TestDiskInfo& disk) {
 159     EXPECT_TRUE(DiskMountManager::GetInstance()->AddDiskForTest(
 160         new DiskMountManager::Disk(disk.source_path,
 161                                    disk.mount_path,
 162                                    disk.system_path,
 163                                    disk.file_path,
 164                                    disk.device_label,
 165                                    disk.drive_label,
 166                                    disk.vendor_id,
 167                                    disk.vendor_name,
 168                                    disk.product_id,
 169                                    disk.product_name,
 170                                    disk.fs_uuid,
 171                                    disk.system_path_prefix,
 172                                    disk.device_type,
 173                                    disk.size_in_bytes,
 174                                    disk.is_parent,
 175                                    disk.is_read_only,
 176                                    disk.has_media,
 177                                    disk.on_boot_device,
 178                                    disk.on_removable_device,
 179                                    disk.is_hidden)));
 180   }
 181
 182   // Adds a new mount point to the disk mount manager.
 183   // If the moutn point is a device mount point, disk with its source path
 184   // should already be added to the disk mount manager.
 185   void AddTestMountPoint(const TestMountPointInfo& mount_point) {
 186     EXPECT_TRUE(DiskMountManager::GetInstance()->AddMountPointForTest(
 187         DiskMountManager::MountPointInfo(mount_point.source_path,
 188                                          mount_point.mount_path,
 189                                          mount_point.mount_type,
 190                                          mount_point.mount_condition)));
 191   }
 192
 193   // Adds disks and mount points to disk mount manager.
 194   void InitDisksAndMountPoints() {
 195     // Disks should be  added first (when adding device mount points it is
 196     // expected that the corresponding disk is already added).
 197     for (size_t i = 0; i < arraysize(kTestDisks); i++)
 198       AddTestDisk(kTestDisks[i]);
 199
 200     for (size_t i = 0; i < arraysize(kTestMountPoints); i++)
 201       AddTestMountPoint(kTestMountPoints[i]);
 202   }
 203
 204  protected:
 205   chromeos::FakeCrosDisksClient* fake_cros_disks_client_;
 206   MockDiskMountManagerObserver observer_;
 207   base::MessageLoopForUI message_loop_;
 208 };
 209
 210 // Tests that the observer gets notified on attempt to format non existent mount
 211 // point.
 212 TEST_F(DiskMountManagerTest, Format_NotMounted) {
 213   EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_COMPLETED,
 214                                        chromeos::FORMAT_ERROR_UNKNOWN,
 215                                        "/mount/non_existent"))
 216       .Times(1);
 217   DiskMountManager::GetInstance()->FormatMountedDevice("/mount/non_existent");
 218 }
 219
 220 // Tests that it is not possible to format archive mount point.
 221 TEST_F(DiskMountManagerTest, Format_Archive) {
 222   EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_COMPLETED,
 223                                        chromeos::FORMAT_ERROR_UNKNOWN,
 224                                        "/archive/source_path"))
 225       .Times(1);
 226
 227   DiskMountManager::GetInstance()->FormatMountedDevice("/archive/mount_path");
 228 }
 229
 230 // Tests that format fails if the device cannot be unmounted.
 231 TEST_F(DiskMountManagerTest, Format_FailToUnmount) {
 232   // Before formatting mounted device, the device should be unmounted.
 233   // In this test unmount will fail, and there should be no attempt to
 234   // format the device.
 235
 236   // Set up expectations for observer mock.
 237   // Observer should be notified that unmount attempt fails and format task
 238   // failed to start.
 239   {
 240     InSequence s;
 241
 242     EXPECT_CALL(observer_,
 243         OnMountEvent(DiskMountManager::UNMOUNTING,
 244                      chromeos::MOUNT_ERROR_INTERNAL,
 245                      Field(&DiskMountManager::MountPointInfo::mount_path,
 246                            "/device/mount_path")))
 247         .Times(1);
 248
 249     EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_COMPLETED,
 250                                          chromeos::FORMAT_ERROR_UNKNOWN,
 251                                          "/device/source_path"))
 252         .Times(1);
 253   }
 254
 255   fake_cros_disks_client_->MakeUnmountFail();
 256   // Start test.
 257   DiskMountManager::GetInstance()->FormatMountedDevice("/device/mount_path");
 258
 259   // Cros disks will respond asynchronoulsy, so let's drain the message loop.
 260   message_loop_.RunUntilIdle();
 261
 262   EXPECT_EQ(1, fake_cros_disks_client_->unmount_call_count());
 263   EXPECT_EQ("/device/mount_path",
 264             fake_cros_disks_client_->last_unmount_device_path());
 265   EXPECT_EQ(chromeos::UNMOUNT_OPTIONS_NONE,
 266             fake_cros_disks_client_->last_unmount_options());
 267   EXPECT_EQ(0, fake_cros_disks_client_->format_call_count());
 268
 269   // The device mount should still be here.
 270   EXPECT_TRUE(HasMountPoint("/device/mount_path"));
 271 }
 272
 273 // Tests that observer is notified when cros disks fails to start format
 274 // process.
 275 TEST_F(DiskMountManagerTest, Format_FormatFailsToStart) {
 276   // Before formatting mounted device, the device should be unmounted.
 277   // In this test, unmount will succeed, but call to Format method will
 278   // fail.
 279
 280   // Set up expectations for observer mock.
 281   // Observer should be notified that the device was unmounted and format task
 282   // failed to start.
 283   {
 284     InSequence s;
 285
 286     EXPECT_CALL(observer_,
 287         OnMountEvent(DiskMountManager::UNMOUNTING,
 288                      chromeos::MOUNT_ERROR_NONE,
 289                      Field(&DiskMountManager::MountPointInfo::mount_path,
 290                            "/device/mount_path")))
 291         .Times(1);
 292
 293     EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_COMPLETED,
 294                                          chromeos::FORMAT_ERROR_UNKNOWN,
 295                                          "/device/source_path"))
 296         .Times(1);
 297   }
 298
 299   fake_cros_disks_client_->MakeFormatFail();
 300   // Start the test.
 301   DiskMountManager::GetInstance()->FormatMountedDevice("/device/mount_path");
 302
 303   // Cros disks will respond asynchronoulsy, so let's drain the message loop.
 304   message_loop_.RunUntilIdle();
 305
 306   EXPECT_EQ(1, fake_cros_disks_client_->unmount_call_count());
 307   EXPECT_EQ("/device/mount_path",
 308             fake_cros_disks_client_->last_unmount_device_path());
 309   EXPECT_EQ(chromeos::UNMOUNT_OPTIONS_NONE,
 310             fake_cros_disks_client_->last_unmount_options());
 311   EXPECT_EQ(1, fake_cros_disks_client_->format_call_count());
 312   EXPECT_EQ("/device/source_path",
 313             fake_cros_disks_client_->last_format_device_path());
 314   EXPECT_EQ("vfat", fake_cros_disks_client_->last_format_filesystem());
 315
 316   // The device mount should be gone.
 317   EXPECT_FALSE(HasMountPoint("/device/mount_path"));
 318 }
 319
 320 // Tests the case where there are two format requests for the same device.
 321 TEST_F(DiskMountManagerTest, Format_ConcurrentFormatCalls) {
 322   // Only the first format request should be processed (the second unmount
 323   // request fails because the device is already unmounted at that point).
 324   // CrosDisksClient will report that the format process for the first request
 325   // is successfully started.
 326
 327   // Set up expectations for observer mock.
 328   // The observer should get a FORMAT_STARTED event for one format request and a
 329   // FORMAT_COMPLETED with an error code for the other format request. The
 330   // formatting will be started only for the first request.
 331   // There should be only one UNMOUNTING event. The result of the second one
 332   // should not be reported as the mount point will go away after the first
 333   // request.
 334   //
 335   // Note that in this test the format completion signal will not be simulated,
 336   // so the observer should not get FORMAT_COMPLETED signal.
 337   {
 338     InSequence s;
 339
 340     EXPECT_CALL(observer_,
 341         OnMountEvent(DiskMountManager::UNMOUNTING,
 342                      chromeos::MOUNT_ERROR_NONE,
 343                      Field(&DiskMountManager::MountPointInfo::mount_path,
 344                            "/device/mount_path")))
 345         .Times(1);
 346
 347     EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_COMPLETED,
 348                                          chromeos::FORMAT_ERROR_UNKNOWN,
 349                                          "/device/source_path"))
 350         .Times(1);
 351
 352     EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_STARTED,
 353                                          chromeos::FORMAT_ERROR_NONE,
 354                                          "/device/source_path"))
 355         .Times(1);
 356   }
 357
 358   fake_cros_disks_client_->set_unmount_listener(
 359       base::Bind(&FakeCrosDisksClient::MakeUnmountFail,
 360                  base::Unretained(fake_cros_disks_client_)));
 361   // Start the test.
 362   DiskMountManager::GetInstance()->FormatMountedDevice("/device/mount_path");
 363   DiskMountManager::GetInstance()->FormatMountedDevice("/device/mount_path");
 364
 365   // Cros disks will respond asynchronoulsy, so let's drain the message loop.
 366   message_loop_.RunUntilIdle();
 367
 368   EXPECT_EQ(2, fake_cros_disks_client_->unmount_call_count());
 369   EXPECT_EQ("/device/mount_path",
 370             fake_cros_disks_client_->last_unmount_device_path());
 371   EXPECT_EQ(chromeos::UNMOUNT_OPTIONS_NONE,
 372             fake_cros_disks_client_->last_unmount_options());
 373   EXPECT_EQ(1, fake_cros_disks_client_->format_call_count());
 374   EXPECT_EQ("/device/source_path",
 375             fake_cros_disks_client_->last_format_device_path());
 376   EXPECT_EQ("vfat",
 377             fake_cros_disks_client_->last_format_filesystem());
 378
 379   // The device mount should be gone.
 380   EXPECT_FALSE(HasMountPoint("/device/mount_path"));
 381 }
 382
 383 // Tests the case when the format process actually starts and fails.
 384 TEST_F(DiskMountManagerTest, Format_FormatFails) {
 385   // Both unmount and format device cals are successful in this test.
 386
 387   // Set up expectations for observer mock.
 388   // The observer should get notified that the device was unmounted and that
 389   // formatting has started.
 390   // After the formatting starts, the test will simulate failing
 391   // FORMAT_COMPLETED signal, so the observer should also be notified the
 392   // formatting has failed (FORMAT_COMPLETED event).
 393   {
 394     InSequence s;
 395
 396     EXPECT_CALL(observer_,
 397         OnMountEvent(DiskMountManager::UNMOUNTING,
 398                      chromeos::MOUNT_ERROR_NONE,
 399                      Field(&DiskMountManager::MountPointInfo::mount_path,
 400                            "/device/mount_path")))
 401         .Times(1);
 402
 403     EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_STARTED,
 404                                          chromeos::FORMAT_ERROR_NONE,
 405                                          "/device/source_path"))
 406         .Times(1);
 407
 408     EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_COMPLETED,
 409                                          chromeos::FORMAT_ERROR_UNKNOWN,
 410                                          "/device/source_path"))
 411         .Times(1);
 412   }
 413
 414   // Start the test.
 415   DiskMountManager::GetInstance()->FormatMountedDevice("/device/mount_path");
 416
 417   // Wait for Unmount and Format calls to end.
 418   message_loop_.RunUntilIdle();
 419
 420   EXPECT_EQ(1, fake_cros_disks_client_->unmount_call_count());
 421   EXPECT_EQ("/device/mount_path",
 422             fake_cros_disks_client_->last_unmount_device_path());
 423   EXPECT_EQ(chromeos::UNMOUNT_OPTIONS_NONE,
 424             fake_cros_disks_client_->last_unmount_options());
 425   EXPECT_EQ(1, fake_cros_disks_client_->format_call_count());
 426   EXPECT_EQ("/device/source_path",
 427             fake_cros_disks_client_->last_format_device_path());
 428   EXPECT_EQ("vfat", fake_cros_disks_client_->last_format_filesystem());
 429
 430   // The device should be unmounted by now.
 431   EXPECT_FALSE(HasMountPoint("/device/mount_path"));
 432
 433   // Send failing FORMAT_COMPLETED signal.
 434   // The failure is marked by ! in fromt of the path (but this should change
 435   // soon).
 436   fake_cros_disks_client_->SendFormatCompletedEvent(
 437       chromeos::FORMAT_ERROR_UNKNOWN, "/device/source_path");
 438 }
 439
 440 // Tests the case when formatting completes successfully.
 441 TEST_F(DiskMountManagerTest, Format_FormatSuccess) {
 442   // Set up cros disks client mocks.
 443   // Both unmount and format device cals are successful in this test.
 444
 445   // Set up expectations for observer mock.
 446   // The observer should receive UNMOUNTING, FORMAT_STARTED and FORMAT_COMPLETED
 447   // events (all of them without an error set).
 448   {
 449     InSequence s;
 450
 451     EXPECT_CALL(observer_,
 452         OnMountEvent(DiskMountManager::UNMOUNTING,
 453                      chromeos::MOUNT_ERROR_NONE,
 454                      Field(&DiskMountManager::MountPointInfo::mount_path,
 455                            "/device/mount_path")))
 456         .Times(1);
 457
 458     EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_STARTED,
 459                                          chromeos::FORMAT_ERROR_NONE,
 460                                          "/device/source_path"))
 461         .Times(1);
 462
 463     EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_COMPLETED,
 464                                          chromeos::FORMAT_ERROR_NONE,
 465                                          "/device/source_path"))
 466         .Times(1);
 467   }
 468
 469   // Start the test.
 470   DiskMountManager::GetInstance()->FormatMountedDevice("/device/mount_path");
 471
 472   // Wait for Unmount and Format calls to end.
 473   message_loop_.RunUntilIdle();
 474
 475   EXPECT_EQ(1, fake_cros_disks_client_->unmount_call_count());
 476   EXPECT_EQ("/device/mount_path",
 477             fake_cros_disks_client_->last_unmount_device_path());
 478   EXPECT_EQ(chromeos::UNMOUNT_OPTIONS_NONE,
 479             fake_cros_disks_client_->last_unmount_options());
 480   EXPECT_EQ(1, fake_cros_disks_client_->format_call_count());
 481   EXPECT_EQ("/device/source_path",
 482             fake_cros_disks_client_->last_format_device_path());
 483   EXPECT_EQ("vfat", fake_cros_disks_client_->last_format_filesystem());
 484
 485   // The device should be unmounted by now.
 486   EXPECT_FALSE(HasMountPoint("/device/mount_path"));
 487
 488   // Simulate cros_disks reporting success.
 489   fake_cros_disks_client_->SendFormatCompletedEvent(
 490       chromeos::FORMAT_ERROR_NONE, "/device/source_path");
 491 }
 492
 493 // Tests that it's possible to format the device twice in a row (this may not be
 494 // true if the list of pending formats is not properly cleared).
 495 TEST_F(DiskMountManagerTest, Format_ConsecutiveFormatCalls) {
 496   // All unmount and format device cals are successful in this test.
 497   // Each of the should be made twice (once for each formatting task).
 498
 499   // Set up expectations for observer mock.
 500   // The observer should receive UNMOUNTING, FORMAT_STARTED and FORMAT_COMPLETED
 501   // events (all of them without an error set) twice (once for each formatting
 502   // task).
 503   // Also, there should be a MOUNTING event when the device remounting is
 504   // simulated.
 505   EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_COMPLETED,
 506                                        chromeos::FORMAT_ERROR_NONE,
 507                                        "/device/source_path"))
 508       .Times(2);
 509
 510   EXPECT_CALL(observer_, OnFormatEvent(DiskMountManager::FORMAT_STARTED,
 511                                        chromeos::FORMAT_ERROR_NONE,
 512                                        "/device/source_path"))
 513       .Times(2);
 514
 515   EXPECT_CALL(observer_,
 516       OnMountEvent(DiskMountManager::UNMOUNTING,
 517                    chromeos::MOUNT_ERROR_NONE,
 518                    Field(&DiskMountManager::MountPointInfo::mount_path,
 519                          "/device/mount_path")))
 520       .Times(2);
 521
 522   EXPECT_CALL(observer_,
 523       OnMountEvent(DiskMountManager::MOUNTING,
 524                    chromeos::MOUNT_ERROR_NONE,
 525                    Field(&DiskMountManager::MountPointInfo::mount_path,
 526                          "/device/mount_path")))
 527       .Times(1);
 528
 529   // Start the test.
 530   DiskMountManager::GetInstance()->FormatMountedDevice("/device/mount_path");
 531
 532   // Wait for Unmount and Format calls to end.
 533   message_loop_.RunUntilIdle();
 534
 535   EXPECT_EQ(1, fake_cros_disks_client_->unmount_call_count());
 536   EXPECT_EQ("/device/mount_path",
 537             fake_cros_disks_client_->last_unmount_device_path());
 538   EXPECT_EQ(chromeos::UNMOUNT_OPTIONS_NONE,
 539             fake_cros_disks_client_->last_unmount_options());
 540   EXPECT_EQ(1, fake_cros_disks_client_->format_call_count());
 541   EXPECT_EQ("/device/source_path",
 542             fake_cros_disks_client_->last_format_device_path());
 543   EXPECT_EQ("vfat", fake_cros_disks_client_->last_format_filesystem());
 544
 545   // The device should be unmounted by now.
 546   EXPECT_FALSE(HasMountPoint("/device/mount_path"));
 547
 548   // Simulate cros_disks reporting success.
 549   fake_cros_disks_client_->SendFormatCompletedEvent(
 550       chromeos::FORMAT_ERROR_NONE, "/device/source_path");
 551
 552   // Simulate the device remounting.
 553   fake_cros_disks_client_->SendMountCompletedEvent(
 554       chromeos::MOUNT_ERROR_NONE,
 555       "/device/source_path",
 556       chromeos::MOUNT_TYPE_DEVICE,
 557       "/device/mount_path");
 558
 559   EXPECT_TRUE(HasMountPoint("/device/mount_path"));
 560
 561   // Try formatting again.
 562   DiskMountManager::GetInstance()->FormatMountedDevice("/device/mount_path");
 563
 564   // Wait for Unmount and Format calls to end.
 565   message_loop_.RunUntilIdle();
 566
 567   EXPECT_EQ(2, fake_cros_disks_client_->unmount_call_count());
 568   EXPECT_EQ("/device/mount_path",
 569             fake_cros_disks_client_->last_unmount_device_path());
 570   EXPECT_EQ(chromeos::UNMOUNT_OPTIONS_NONE,
 571             fake_cros_disks_client_->last_unmount_options());
 572   EXPECT_EQ(2, fake_cros_disks_client_->format_call_count());
 573   EXPECT_EQ("/device/source_path",
 574             fake_cros_disks_client_->last_format_device_path());
 575   EXPECT_EQ("vfat", fake_cros_disks_client_->last_format_filesystem());
 576
 577   // Simulate cros_disks reporting success.
 578   fake_cros_disks_client_->SendFormatCompletedEvent(
 579       chromeos::FORMAT_ERROR_NONE, "/device/source_path");
 580 }
 581
 582 }  // namespace