Add mock ARC volume and initial tests.

This adds a fake local ARC volume for testing. Initial integration
tests added check that
1) the "Toggle Play Folders" button work in hiding and showing the
   non-default Android files and folders.
2) the "Toggle Play Folders" button is shown inside Play Files but
   hidden from the "Recents" pane.

Bug: 877371
Test: Tested on Chromium build.
Change-Id: Ic35de5ebb06f901ad229c9b35f1917ac9353a459
Reviewed-on: https://chromium-review.googlesource.com/1201637
Commit-Queue: Alex Lau <alexlau@chromium.org>
Reviewed-by: Naoki Fukino <fukino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589847}

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -565,14 +565,17 @@ WRAPPED_INSTANTIATE_TEST_CASE_P(
 WRAPPED_INSTANTIATE_TEST_CASE_P(
     GearMenu, /* gear_menu.js */
     FilesAppBrowserTest,
-    ::testing::Values(TestCase("showHiddenFilesDownloads"),
+    ::testing::Values(
+        TestCase("showHiddenFilesDownloads"),
         TestCase("showHiddenFilesDownloads").InGuestMode(),
         TestCase("showHiddenFilesDrive"),
         TestCase("showHiddenFilesDrive").EnableDriveFs(),
         TestCase("toogleGoogleDocsDrive"),
         TestCase("toogleGoogleDocsDrive").EnableDriveFs(),
         TestCase("showPasteIntoCurrentFolder"),
-                      TestCase("showSelectAllInCurrentFolder")));
+        TestCase("showSelectAllInCurrentFolder"),
+        TestCase("showToggleHiddenAndroidFoldersGearMenuItemsInMyFiles"),
+        TestCase("enableToggleHiddenAndroidFoldersShowsHiddenFiles")));
 
 WRAPPED_INSTANTIATE_TEST_CASE_P(
     Crostini, /* crostini.js */

chrome/browser/chromeos/file_manager/file_manager_browsertest_base.cc

@@ -100,7 +100,13 @@ struct AddEntriesMessage {
   struct TestEntryInfo;
 
   // Represents the various volumes available for adding entries.
-  enum TargetVolume { LOCAL_VOLUME, DRIVE_VOLUME, CROSTINI_VOLUME, USB_VOLUME };
+  enum TargetVolume {
+    LOCAL_VOLUME,
+    DRIVE_VOLUME,
+    CROSTINI_VOLUME,
+    USB_VOLUME,
+    ANDROID_FILES_VOLUME
+  };
 
   // Represents the different types of entries (e.g. file, folder).
   enum EntryType { FILE, DIRECTORY, TEAM_DRIVE };
@@ -143,6 +149,8 @@ struct AddEntriesMessage {
       *volume = CROSTINI_VOLUME;
     else if (value == "usb")
       *volume = USB_VOLUME;
+    else if (value == "android_files")
+      *volume = ANDROID_FILES_VOLUME;
     else
       return false;
     return true;
@@ -488,6 +496,30 @@ class DownloadsTestVolume : public LocalTestVolume {
   DISALLOW_COPY_AND_ASSIGN(DownloadsTestVolume);
 };
 
+class AndroidFilesTestVolume : public LocalTestVolume {
+ public:
+  AndroidFilesTestVolume() : LocalTestVolume("AndroidFiles") {}
+  ~AndroidFilesTestVolume() override = default;
+
+  bool Initialize(Profile* profile) { return CreateRootDirectory(profile); }
+
+  bool Mount(Profile* profile) override {
+    return CreateRootDirectory(profile) &&
+           VolumeManager::Get(profile)->RegisterAndroidFilesDirectoryForTesting(
+               root_path());
+  }
+
+  const base::FilePath& mount_path() const { return root_path(); }
+
+  void Unmount(Profile* profile) {
+    VolumeManager::Get(profile)->RemoveAndroidFilesDirectoryForTesting(
+        root_path());
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AndroidFilesTestVolume);
+};
+
 // CrostiniTestVolume: local test volume for the "Linux files" directory.
 class CrostiniTestVolume : public LocalTestVolume {
  public:
@@ -1040,6 +1072,9 @@ void FileManagerBrowserTestBase::SetUpOnMainThread() {
         ->AddCustomMountPointCallback(
             base::BindRepeating(&FileManagerBrowserTestBase::MaybeMountCrostini,
                                 base::Unretained(this)));
+
+    android_files_volume_ = std::make_unique<AndroidFilesTestVolume>();
+    android_files_volume_->Mount(profile());
   }
 
   display_service_ =
@@ -1173,6 +1208,10 @@ void FileManagerBrowserTestBase::OnCommand(const std::string& name,
         dictionary.SetString(
             "drive", base::StrCat({"/", drive_mount_name.value(), "/root"}));
       }
+      if (android_files_volume_) {
+        dictionary.SetString("android_files",
+                             "/" + util::GetAndroidFilesMountPointName());
+      }
     }
     base::JSONWriter::Write(dictionary, output);
     return;
@@ -1229,6 +1268,11 @@ void FileManagerBrowserTestBase::OnCommand(const std::string& name,
             LOG(FATAL) << "Add entry: but no USB volume.";
           }
           break;
+        case AddEntriesMessage::ANDROID_FILES_VOLUME:
+          CHECK(android_files_volume_);
+          ASSERT_TRUE(android_files_volume_->Initialize(profile()));
+          android_files_volume_->CreateEntry(*message.entries[i]);
+          break;
       }
     }
 

chrome/browser/chromeos/file_manager/file_manager_browsertest_base.h

@@ -25,6 +25,7 @@ class DriveTestVolume;
 class FakeTestVolume;
 class LocalTestVolume;
 class CrostiniTestVolume;
+class AndroidFilesTestVolume;
 
 class FileManagerBrowserTestBase : public extensions::ExtensionApiTest {
  protected:
@@ -109,6 +110,7 @@ class FileManagerBrowserTestBase : public extensions::ExtensionApiTest {
 
   std::unique_ptr<LocalTestVolume> local_volume_;
   std::unique_ptr<CrostiniTestVolume> crostini_volume_;
+  std::unique_ptr<AndroidFilesTestVolume> android_files_volume_;
   std::map<Profile*, std::unique_ptr<DriveTestVolume>> drive_volumes_;
   DriveTestVolume* drive_volume_ = nullptr;
   std::unique_ptr<FakeTestVolume> usb_volume_;

chrome/browser/chromeos/file_manager/path_util.cc

@@ -37,6 +37,7 @@ const char kDownloadsFolderName[] = "Downloads";
 const char kGoogleDriveDisplayName[] = "Google Drive";
 const char kRootRelativeToDriveMount[] = "root";
 const char kTeamDrivesRelativeToDriveMount[] = "team_drives";
+const char kAndroidFilesMountPointName[] = "android_files";
 
 // Sync with the file provider in ARC++ side.
 constexpr char kArcFileProviderUrl[] =
@@ -128,6 +129,10 @@ std::string GetDownloadsMountPointName(Profile* profile) {
   return net::EscapeQueryParamValue(kDownloadsFolderName + id, false);
 }
 
+std::string GetAndroidFilesMountPointName() {
+  return kAndroidFilesMountPointName;
+}
+
 std::string GetCrostiniMountPointName(Profile* profile) {
   // crostini_<hash>_termina_penguin
   return base::JoinString(

chrome/browser/chromeos/file_manager/path_util.h

@@ -46,6 +46,9 @@ bool MigratePathFromOldFormat(Profile* profile,
 // The canonical mount point name for "Downloads" folder.
 std::string GetDownloadsMountPointName(Profile* profile);
 
+// The canonical mount point name for ARC "Play files" folder.
+std::string GetAndroidFilesMountPointName();
+
 // The canonical mount point name for crostini "Linux files" folder.
 std::string GetCrostiniMountPointName(Profile* profile);
 

chrome/browser/chromeos/file_manager/volume_manager.cc

@@ -54,7 +54,6 @@ const uint32_t kFilesystemTypeGenericHierarchical = 2;
 const char kFileManagerMTPMountNamePrefix[] = "fileman-mtp-";
 const char kMtpVolumeIdPrefix[] = "mtp:";
 const char kRootPath[] = "/";
-const char kAndroidFilesMountPointName[] = "android_files";
 
 // Registers |path| as the "Downloads" folder to the FileSystem API backend.
 // If another folder is already mounted. It revokes and overrides the old one.
@@ -89,8 +88,8 @@ bool RegisterAndroidFilesMountPoint() {
   storage::ExternalMountPoints* const mount_points =
       storage::ExternalMountPoints::GetSystemInstance();
   return mount_points->RegisterFileSystem(
-      kAndroidFilesMountPointName, storage::kFileSystemTypeNativeLocal,
-      storage::FileSystemMountOption(),
+      file_manager::util::GetAndroidFilesMountPointName(),
+      storage::kFileSystemTypeNativeLocal, storage::FileSystemMountOption(),
       base::FilePath(util::kAndroidFilesPath));
 }
 
@@ -342,13 +341,14 @@ std::unique_ptr<Volume> Volume::CreateForSshfsCrostini(
 }
 
 // static
-std::unique_ptr<Volume> Volume::CreateForAndroidFiles() {
+std::unique_ptr<Volume> Volume::CreateForAndroidFiles(
+    const base::FilePath& mount_path) {
   std::unique_ptr<Volume> volume(new Volume());
   volume->type_ = VOLUME_TYPE_ANDROID_FILES;
   volume->device_type_ = chromeos::DEVICE_TYPE_UNKNOWN;
   // Keep source_path empty.
   volume->source_ = SOURCE_SYSTEM;
-  volume->mount_path_ = base::FilePath(util::kAndroidFilesPath);
+  volume->mount_path_ = mount_path;
   volume->mount_condition_ = chromeos::disks::MOUNT_CONDITION_NONE;
   volume->volume_id_ = GenerateVolumeId(*volume);
   volume->watchable_ = true;
@@ -570,6 +570,27 @@ void VolumeManager::RemoveSshfsCrostiniVolume(
       chromeos::disks::DiskMountManager::UnmountPathCallback());
 }
 
+bool VolumeManager::RegisterAndroidFilesDirectoryForTesting(
+    const base::FilePath& path) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  bool result =
+      storage::ExternalMountPoints::GetSystemInstance()->RegisterFileSystem(
+          file_manager::util::GetAndroidFilesMountPointName(),
+          storage::kFileSystemTypeNativeLocal, storage::FileSystemMountOption(),
+          path);
+  DCHECK(result);
+  DoMountEvent(chromeos::MOUNT_ERROR_NONE, Volume::CreateForAndroidFiles(path));
+  return true;
+}
+
+bool VolumeManager::RemoveAndroidFilesDirectoryForTesting(
+    const base::FilePath& path) {
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+  DoUnmountEvent(chromeos::MOUNT_ERROR_NONE,
+                 *Volume::CreateForAndroidFiles(path));
+  return true;
+}
+
 bool VolumeManager::RegisterDownloadsDirectoryForTesting(
     const base::FilePath& path) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
@@ -931,7 +952,9 @@ void VolumeManager::OnArcPlayStoreEnabledChanged(bool enabled) {
     DoMountEvent(chromeos::MOUNT_ERROR_NONE,
                  Volume::CreateForMediaView(arc::kAudioRootDocumentId));
     if (IsShowAndroidFilesEnabled())
-      DoMountEvent(chromeos::MOUNT_ERROR_NONE, Volume::CreateForAndroidFiles());
+      DoMountEvent(chromeos::MOUNT_ERROR_NONE,
+                   Volume::CreateForAndroidFiles(
+                       base::FilePath(util::kAndroidFilesPath)));
   } else {
     DoUnmountEvent(chromeos::MOUNT_ERROR_NONE,
                    *Volume::CreateForMediaView(arc::kImagesRootDocumentId));
@@ -941,7 +964,8 @@ void VolumeManager::OnArcPlayStoreEnabledChanged(bool enabled) {
                    *Volume::CreateForMediaView(arc::kAudioRootDocumentId));
     if (IsShowAndroidFilesEnabled()) {
       DoUnmountEvent(chromeos::MOUNT_ERROR_NONE,
-                     *Volume::CreateForAndroidFiles());
+                     *Volume::CreateForAndroidFiles(
+                         base::FilePath(util::kAndroidFilesPath)));
     }
   }
 

chrome/browser/chromeos/file_manager/volume_manager.h

@@ -106,7 +106,8 @@ class Volume : public base::SupportsWeakPtr<Volume> {
       const std::string& root_document_id);
   static std::unique_ptr<Volume> CreateForSshfsCrostini(
       const base::FilePath& crostini_path);
-  static std::unique_ptr<Volume> CreateForAndroidFiles();
+  static std::unique_ptr<Volume> CreateForAndroidFiles(
+      const base::FilePath& mount_path);
   static std::unique_ptr<Volume> CreateForTesting(
       const base::FilePath& path,
       VolumeType volume_type,
@@ -304,6 +305,14 @@ class VolumeManager : public KeyedService,
   // |path| with CROSTINI type, and adds its volume info.
   bool RegisterCrostiniDirectoryForTesting(const base::FilePath& path);
 
+  // For testing purpose, registers a native local file system pointing to
+  // |path| with ANDROID_FILES type, and adds its volume info.
+  bool RegisterAndroidFilesDirectoryForTesting(const base::FilePath& path);
+
+  // For testing purpose, removes a registered native local file system
+  // pointing to |path| with ANDROID_FILES type, and removes its volume info.
+  bool RemoveAndroidFilesDirectoryForTesting(const base::FilePath& path);
+
   // For testing purpose, adds a volume info pointing to |path|, with TESTING
   // type. Assumes that the mount point is already registered.
   void AddVolumeForTesting(const base::FilePath& path,

ui/file_manager/integration_tests/file_manager/background.js

@@ -457,6 +457,7 @@ window.addEventListener('load', function() {
       var roots = JSON.parse(paths);
       RootPath.DOWNLOADS = roots.downloads;
       RootPath.DRIVE = roots.drive;
+      RootPath.ANDROID_FILES = roots.android_files;
       chrome.test.sendMessage(
           JSON.stringify({name: 'getTestName'}), steps.shift());
     },

ui/file_manager/integration_tests/file_manager/gear_menu.js

@@ -35,6 +35,16 @@ const BASIC_DRIVE_ENTRY_SET_WITH_HIDDEN = [
   ENTRIES.hiddenFile
 ];
 
+const BASIC_ANDROID_ENTRY_SET = [
+  ENTRIES.directoryDocuments, ENTRIES.directoryMovies, ENTRIES.directoryMusic,
+  ENTRIES.directoryPictures
+];
+
+const BASIC_ANDROID_ENTRY_SET_WITH_HIDDEN = [
+  ENTRIES.directoryDocuments, ENTRIES.directoryMovies, ENTRIES.directoryMusic,
+  ENTRIES.directoryPictures, ENTRIES.hello, ENTRIES.world, ENTRIES.directoryA
+];
+
 /**
  * Expected files shown in Drive with Google Docs disabled
  *
@@ -57,11 +67,39 @@ const BASIC_DRIVE_ENTRY_SET_WITHOUT_GDOCS = [
  * @return {!Array} The test steps to toggle hidden files
  */
 function getTestCaseStepsForHiddenFiles(basicSet, hiddenEntrySet) {
+  return getTestCaseStepsForHiddenFilesWithMenuItem(
+      basicSet, hiddenEntrySet, '#gear-menu-toggle-hidden-files');
+}
+
+/**
+ * Gets the common steps to toggle Android hidden files in the Files app
+ * @param {!Array<!TestEntryInfo>} basicSet Files expected before showing hidden
+ * @param {!Array<!TestEntryInfo>} hiddenEntrySet Files expected after showing
+ * hidden
+ * @return {!Array} The test steps to toggle hidden files
+ */
+function getTestCaseStepsForAndroidHiddenFiles(basicSet, hiddenEntrySet) {
+  return getTestCaseStepsForHiddenFilesWithMenuItem(
+      basicSet, hiddenEntrySet, '#gear-menu-toggle-hidden-android-folders');
+}
+
+/**
+ * Gets the common steps to toggle hidden files in the Files app
+ * @param {!Array<!TestEntryInfo>} basicSet Files expected before showing hidden
+ * @param {!Array<!TestEntryInfo>} hiddenEntrySet Files expected after showing
+ * hidden
+ * @param {string} toggleMenuItemSelector Selector for the menu item that
+ * toggles hidden file visibility
+ * @return {!Array} The test steps to toggle hidden files
+ */
+function getTestCaseStepsForHiddenFilesWithMenuItem(
+    basicSet, hiddenEntrySet, toggleMenuItemSelector) {
   var appId;
   return [
     function(id) {
       appId = id;
-      remoteCall.waitForElement(appId, '#gear-button').then(this.next);
+      remoteCall.waitForElement(appId, '#gear-button:not([hidden])')
+          .then(this.next);
     },
     // Open the gear menu by clicking the gear button.
     function() {
@@ -76,25 +114,26 @@ function getTestCaseStepsForHiddenFiles(basicSet, hiddenEntrySet) {
     },
     // Wait for menu item to appear.
     function(result) {
-      remoteCall.waitForElement(appId,
-          '#gear-menu-toggle-hidden-files:not([disabled])').then(this.next);
+      remoteCall
+          .waitForElement(appId, toggleMenuItemSelector + ':not([disabled])')
+          .then(this.next);
     },
     // Wait for menu item to appear.
     function(result) {
-      remoteCall.waitForElement(appId,
-          '#gear-menu-toggle-hidden-files:not([checked])').then(this.next);
+      remoteCall
+          .waitForElement(appId, toggleMenuItemSelector + ':not([checked])')
+          .then(this.next);
     },
     // Click the menu item.
     function(results) {
       remoteCall.callRemoteTestUtil(
-          'fakeMouseClick', appId, ['#gear-menu-toggle-hidden-files'],
-              this.next);
+          'fakeMouseClick', appId, [toggleMenuItemSelector], this.next);
     },
     // Wait for item to be checked.
     function(result) {
       chrome.test.assertTrue(result);
-      remoteCall.waitForElement(appId,
-          '#gear-menu-toggle-hidden-files[checked]').then(this.next);
+      remoteCall.waitForElement(appId, toggleMenuItemSelector + '[checked]')
+          .then(this.next);
     },
     // Check the hidden files are displayed.
     function(result) {
@@ -104,7 +143,8 @@ function getTestCaseStepsForHiddenFiles(basicSet, hiddenEntrySet) {
     },
     // Repeat steps to toggle again.
     function(inAppId) {
-      remoteCall.waitForElement(appId, '#gear-button').then(this.next);
+      remoteCall.waitForElement(appId, '#gear-button:not([hidden])')
+          .then(this.next);
     },
     function() {
       remoteCall.callRemoteTestUtil(
@@ -116,22 +156,23 @@ function getTestCaseStepsForHiddenFiles(basicSet, hiddenEntrySet) {
           this.next);
     },
     function(result) {
-      remoteCall.waitForElement(appId,
-          '#gear-menu-toggle-hidden-files:not([disabled])').then(this.next);
+      remoteCall
+          .waitForElement(appId, toggleMenuItemSelector + ':not([disabled])')
+          .then(this.next);
     },
     function(result) {
-      remoteCall.waitForElement(appId,
-          '#gear-menu-toggle-hidden-files[checked]').then(this.next);
+      remoteCall.waitForElement(appId, toggleMenuItemSelector + '[checked]')
+          .then(this.next);
     },
     function(results) {
       remoteCall.callRemoteTestUtil(
-          'fakeMouseClick', appId, ['#gear-menu-toggle-hidden-files'],
-              this.next);
+          'fakeMouseClick', appId, [toggleMenuItemSelector], this.next);
     },
     function(result) {
       chrome.test.assertTrue(result);
-      remoteCall.waitForElement(appId,
-          '#gear-menu-toggle-hidden-files:not([checked])').then(this.next);
+      remoteCall
+          .waitForElement(appId, toggleMenuItemSelector + ':not([checked])')
+          .then(this.next);
     },
     function(result) {
       remoteCall.waitForFiles(appId, TestEntryInfo.getExpectedRows(basicSet),
@@ -276,6 +317,126 @@ testcase.toogleGoogleDocsDrive = function() {
   ]);
 };
 
+/**
+ * Tests that toggle-hidden-android-folders menu item exists when "Play files"
+ * is selected, but hidden in Recents.
+ */
+testcase.showToggleHiddenAndroidFoldersGearMenuItemsInMyFiles = function() {
+  var appId;
+  StepsRunner.run([
+    // Open Files.App on Play Files.
+    function() {
+      openNewWindow(null, RootPath.ANDROID_FILES).then(this.next);
+    },
+    function(inAppId) {
+      appId = inAppId;
+      addEntries(['android_files'], BASIC_ANDROID_ENTRY_SET, this.next);
+    },
+    // Wait for the file list to appear.
+    function(result) {
+      chrome.test.assertTrue(result);
+      remoteCall.waitForElement(appId, '#file-list').then(this.next);
+    },
+    // Wait for the gear menu button to appear.
+    function() {
+      remoteCall.waitForElement(appId, '#gear-button:not([hidden])')
+          .then(this.next);
+    },
+    // Click the gear menu button.
+    function() {
+      remoteCall.callRemoteTestUtil(
+          'fakeMouseClick', appId, ['#gear-button'], this.next);
+    },
+    // Wait for the gear menu to appear.
+    function(result) {
+      chrome.test.assertTrue(result);
+      remoteCall.waitForElement(appId, '#gear-menu:not([hidden])')
+          .then(this.next);
+    },
+    // #toggle-hidden-android-folders command should be shown and disabled by
+    // default.
+    function() {
+      remoteCall
+          .waitForElement(
+              appId,
+              '#gear-menu-toggle-hidden-android-folders' +
+                  ':not([checked]):not([hidden])')
+          .then(this.next);
+    },
+    // Click the file list: the gear menu should hide.
+    function() {
+      remoteCall.callRemoteTestUtil(
+          'fakeMouseClick', appId, ['#file-list'], this.next);
+    },
+    // Wait for the gear menu to hide.
+    function() {
+      remoteCall.waitForElement(appId, '#gear-menu[hidden]').then(this.next);
+    },
+    // Navigate to Recent.
+    function() {
+      remoteCall.callRemoteTestUtil(
+          'fakeMouseClick', appId, ['span[root-type-icon=\'recent\']'],
+          this.next);
+    },
+    // Click the gear menu button.
+    function() {
+      remoteCall.callRemoteTestUtil(
+          'fakeMouseClick', appId, ['#gear-button'], this.next);
+    },
+    // Wait for the gear menu to appear.
+    function(result) {
+      chrome.test.assertTrue(result);
+      remoteCall.waitForElement(appId, '#gear-menu:not([hidden])')
+          .then(this.next);
+    },
+    // #toggle-hidden-android-folders command should be hidden.
+    function(result) {
+      remoteCall
+          .waitForElement(
+              appId, '#gear-menu-toggle-hidden-android-folders[hidden]')
+          .then(this.next);
+    },
+    function() {
+      checkIfNoErrorsOccured(this.next);
+    },
+  ]);
+};
+
+/**
+ * Tests that "Play files" shows the full set of files after
+ * toggle-hidden-android-folders is enabled.
+ */
+testcase.enableToggleHiddenAndroidFoldersShowsHiddenFiles = function() {
+  var appId;
+  var steps = [
+    // Open Files.App on Play Files.
+    function() {
+      openNewWindow(null, RootPath.ANDROID_FILES).then(this.next);
+    },
+    function(inAppId) {
+      appId = inAppId;
+      addEntries(
+          ['android_files'], BASIC_ANDROID_ENTRY_SET_WITH_HIDDEN, this.next);
+    },
+    // Wait for the file list to appear.
+    function(result) {
+      chrome.test.assertTrue(result);
+      remoteCall.waitForElement(appId, '#file-list').then(this.next);
+    },
+    // Wait for the gear menu button to appear.
+    function() {
+      remoteCall.waitForElement(appId, '#gear-button:not([hidden])')
+          .then(this.next);
+    },
+    function() {
+      this.next(appId);
+    }
+  ];
+  steps = steps.concat(getTestCaseStepsForAndroidHiddenFiles(
+      BASIC_ANDROID_ENTRY_SET, BASIC_ANDROID_ENTRY_SET_WITH_HIDDEN));
+  StepsRunner.run(steps);
+};
+
 /**
  * Tests the paste-into-current-folder menu item.
  */

ui/file_manager/integration_tests/file_manager/my_files.js

@@ -12,6 +12,7 @@ testcase.showMyFiles = function() {
     'Recent: FakeItem',
     'My files: EntryListItem',
     'Downloads: SubDirectoryItem',
+    'Play files: SubDirectoryItem',
     'Linux files: FakeItem',
     'Google Drive: DriveVolumeItem',
     'My Drive: SubDirectoryItem',
@@ -192,10 +193,11 @@ testcase.myFilesDisplaysAndOpensEntries = function() {
     function(result) {
       chrome.test.assertTrue(result);
       const downloadsRow = ['Downloads', '--', 'Folder'];
+      const playFilesRow = ['Play files', '--', 'Folder'];
       const crostiniRow = ['Linux files', '--', 'Folder'];
       remoteCall
           .waitForFiles(
-              appId, [downloadsRow, crostiniRow],
+              appId, [downloadsRow, playFilesRow, crostiniRow],
               {ignoreFileSize: true, ignoreLastModifiedTime: true})
           .then(this.next);
     },

ui/file_manager/integration_tests/test_util.js

@@ -218,6 +218,7 @@ var SharedOption = Object.freeze({
 var RootPath = Object.seal({
   DOWNLOADS: '/must-be-filled-in-test-setup',
   DRIVE: '/must-be-filled-in-test-setup',
+  ANDROID_FILES: '/must-be-filled-in-test-setup',
 });
 
 
@@ -732,5 +733,67 @@ var ENTRIES = {
       canDelete: false,
       canShare: true
     },
-  })
+  }),
+
+  // Default Android directories.
+  directoryDocuments: new TestEntryInfo({
+    type: EntryType.DIRECTORY,
+    targetPath: 'Documents',
+    lastModifiedTime: 'Jan 1, 2000, 1:00 AM',
+    nameText: 'Documents',
+    sizeText: '--',
+    typeText: 'Folder',
+    capabilities: {
+      canCopy: false,
+      canAddChildren: true,
+      canRename: false,
+      canDelete: false,
+      canShare: true
+    },
+  }),
+  directoryMovies: new TestEntryInfo({
+    type: EntryType.DIRECTORY,
+    targetPath: 'Movies',
+    lastModifiedTime: 'Jan 1, 2000, 1:00 AM',
+    nameText: 'Movies',
+    sizeText: '--',
+    typeText: 'Folder',
+    capabilities: {
+      canCopy: false,
+      canAddChildren: true,
+      canRename: false,
+      canDelete: false,
+      canShare: true
+    },
+  }),
+  directoryMusic: new TestEntryInfo({
+    type: EntryType.DIRECTORY,
+    targetPath: 'Music',
+    lastModifiedTime: 'Jan 1, 2000, 1:00 AM',
+    nameText: 'Music',
+    sizeText: '--',
+    typeText: 'Folder',
+    capabilities: {
+      canCopy: false,
+      canAddChildren: true,
+      canRename: false,
+      canDelete: false,
+      canShare: true
+    },
+  }),
+  directoryPictures: new TestEntryInfo({
+    type: EntryType.DIRECTORY,
+    targetPath: 'Pictures',
+    lastModifiedTime: 'Jan 1, 2000, 1:00 AM',
+    nameText: 'Pictures',
+    sizeText: '--',
+    typeText: 'Folder',
+    capabilities: {
+      canCopy: false,
+      canAddChildren: true,
+      canRename: false,
+      canDelete: false,
+      canShare: true
+    },
+  }),
 };