@Test
  public void testWriteOperations() throws Exception {

    // ------------------------------------------------------
    // Check #createFolder
    // ------------------------------------------------------
    // Not allowed to create a folder in a non FolderItem
    try {
      fileSystemItemManagerService.createFolder(
          DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId(), "A new folder", principal);
      fail("Folder creation in a non folder item should fail.");
    } catch (NuxeoException e) {
      assertEquals(
          String.format(
              "Cannot create a folder in file system item with id %s because it is not a folder but is: "
                  + "DocumentBackedFileItem(id=\"%s\", name=\"Joe.odt\")",
              DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId(),
              DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId()),
          e.getMessage());
    }

    // Folder creation
    FolderItem newFolderItem =
        fileSystemItemManagerService.createFolder(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), "A new folder", principal);
    assertNotNull(newFolderItem);
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), newFolderItem.getParentId());
    assertEquals("A new folder", newFolderItem.getName());
    DocumentModelList folderChildren =
        session.query(
            String.format(
                "select * from Document where ecm:parentId = '%s' and ecm:primaryType = 'Folder' order by dc:title asc",
                folder.getId()));
    DocumentModel newFolder = folderChildren.get(0);
    assertTrue(newFolder.isFolder());
    assertEquals("A new folder", newFolder.getTitle());

    // Parent folder children check
    assertEquals(
        6,
        fileSystemItemManagerService
            .getChildren(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), principal)
            .size());

    // ------------------------------------------------------
    // Check #createFile
    // ------------------------------------------------------
    // File creation
    Blob blob = new StringBlob("Content of a new file.");
    blob.setFilename("New file.odt");
    blob.setMimeType("application/vnd.oasis.opendocument.text");
    FileItem fileItem =
        fileSystemItemManagerService.createFile(newFolderItem.getId(), blob, principal);
    assertNotNull(fileItem);
    assertEquals(newFolderItem.getId(), fileItem.getParentId());
    assertEquals("New file.odt", fileItem.getName());
    folderChildren =
        session.query(
            String.format("select * from Document where ecm:parentId = '%s'", newFolder.getId()));
    assertEquals(1, folderChildren.size());
    DocumentModel newFile = folderChildren.get(0);
    assertEquals("File", newFile.getType());
    assertEquals("New file.odt", newFile.getTitle());
    assertEquals("/syncRoot1/aFolder/A new folder/New file.odt", newFile.getPathAsString());
    Blob newFileBlob = (Blob) newFile.getPropertyValue("file:content");
    assertEquals("New file.odt", newFileBlob.getFilename());
    assertEquals("Content of a new file.", newFileBlob.getString());
    assertEquals(
        "nxfile/test/" + newFile.getId() + "/blobholder:0/New%20file.odt",
        fileItem.getDownloadURL());
    assertEquals("MD5", fileItem.getDigestAlgorithm());
    assertEquals(newFileBlob.getDigest(), fileItem.getDigest());

    // Parent folder children check
    assertEquals(
        1, fileSystemItemManagerService.getChildren(newFolderItem.getId(), principal).size());

    // ------------------------------------------------------
    // Check #updateFile
    // ------------------------------------------------------
    String fileItemId = fileItem.getId();
    String fileItemParentId = fileItem.getParentId();
    blob = new StringBlob("Modified content of an existing file.");
    fileItem = fileSystemItemManagerService.updateFile(fileItemId, blob, principal);
    assertNotNull(fileItem);
    assertEquals(fileItemId, fileItem.getId());
    assertEquals(fileItemParentId, fileItem.getParentId());
    assertEquals("New file.odt", fileItem.getName());
    folderChildren =
        session.query(
            String.format("select * from Document where ecm:parentId = '%s'", newFolder.getId()));
    assertEquals(1, folderChildren.size());
    DocumentModel updatedFile = folderChildren.get(0);
    assertEquals("File", updatedFile.getType());
    assertEquals("New file.odt", updatedFile.getTitle());
    assertEquals("/syncRoot1/aFolder/A new folder/New file.odt", updatedFile.getPathAsString());
    Blob updatedFileBlob = (Blob) updatedFile.getPropertyValue("file:content");
    assertEquals("New file.odt", updatedFileBlob.getFilename());
    assertEquals("Modified content of an existing file.", updatedFileBlob.getString());
    assertEquals(
        "nxfile/test/" + updatedFile.getId() + "/blobholder:0/New%20file.odt",
        fileItem.getDownloadURL());
    assertEquals("MD5", fileItem.getDigestAlgorithm());
    assertEquals(updatedFileBlob.getDigest(), fileItem.getDigest());

    // ------------------------------------------------------
    // Check #delete
    // ------------------------------------------------------
    // File deletion
    fileSystemItemManagerService.delete(
        DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + updatedFile.getId(), principal);
    updatedFile = session.getDocument(new IdRef(updatedFile.getId()));
    assertEquals("deleted", updatedFile.getCurrentLifeCycleState());

    // Parent folder children check
    assertTrue(
        fileSystemItemManagerService.getChildren(newFolderItem.getId(), principal).isEmpty());

    // ------------------------------------------------------
    // Check #rename
    // ------------------------------------------------------
    // Folder rename
    String fsItemId = DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId();
    FileSystemItem fsItem =
        fileSystemItemManagerService.rename(fsItemId, "Jack's folder has a new name", principal);
    assertEquals(fsItemId, fsItem.getId());
    String expectedSyncRoot1Id = DEFAULT_SYNC_ROOT_ITEM_ID_PREFIX + syncRoot1.getId();
    assertEquals(expectedSyncRoot1Id, fsItem.getParentId());
    assertEquals("Jack's folder has a new name", fsItem.getName());
    folder = session.getDocument(folder.getRef());
    assertEquals("Jack's folder has a new name", folder.getTitle());

    // File rename with title != filename
    // => should rename filename but not title
    assertEquals("aFile", file.getTitle());
    assertEquals("Joe.odt", ((Blob) file.getPropertyValue("file:content")).getFilename());
    fsItemId = DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId();
    fsItem = fileSystemItemManagerService.rename(fsItemId, "File new name.odt", principal);
    assertEquals(fsItemId, fsItem.getId());
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), fsItem.getParentId());
    assertEquals("File new name.odt", fsItem.getName());
    file = session.getDocument(file.getRef());
    assertEquals("aFile", file.getTitle());
    Blob fileBlob = (Blob) file.getPropertyValue("file:content");
    assertEquals("File new name.odt", fileBlob.getFilename());
    fileItem = (FileItem) fsItem;
    assertEquals(
        "nxfile/test/" + file.getId() + "/blobholder:0/File%20new%20name.odt",
        fileItem.getDownloadURL());
    assertEquals("MD5", fileItem.getDigestAlgorithm());
    assertEquals(fileBlob.getDigest(), fileItem.getDigest());

    // File rename with title == filename
    // => should rename filename and title
    blob = new StringBlob("File for a doc with title == filename.");
    blob.setFilename("Title-filename equality.odt");
    blob.setMimeType("application/vnd.oasis.opendocument.text");
    fileItem = fileSystemItemManagerService.createFile(newFolderItem.getId(), blob, principal);
    // Note that the PathSegmentService truncates doc title at 24 characters
    newFile =
        session.getDocument(
            new PathRef("/syncRoot1/aFolder/A new folder/Title-filename equality."));
    assertEquals("Title-filename equality.odt", newFile.getTitle());
    assertEquals(
        "Title-filename equality.odt",
        ((Blob) newFile.getPropertyValue("file:content")).getFilename());
    fileItem =
        (FileItem)
            fileSystemItemManagerService.rename(
                DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + newFile.getId(),
                "Renamed title-filename equality.odt",
                principal);
    assertEquals("Renamed title-filename equality.odt", fileItem.getName());
    newFile = session.getDocument(newFile.getRef());
    assertEquals("Renamed title-filename equality.odt", newFile.getTitle());
    newFileBlob = (Blob) newFile.getPropertyValue("file:content");
    assertEquals("Renamed title-filename equality.odt", newFileBlob.getFilename());
    assertEquals(
        "nxfile/test/" + newFile.getId() + "/blobholder:0/Renamed%20title-filename%20equality.odt",
        fileItem.getDownloadURL());
    assertEquals("MD5", fileItem.getDigestAlgorithm());
    assertEquals(newFileBlob.getDigest(), fileItem.getDigest());

    // ------------------------------------------------------
    // Check #move
    // ------------------------------------------------------
    // Not allowed to move a file system item to a non FolderItem
    String srcFsItemId = DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + note.getId();
    String destFsItemId = DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId();
    try {
      fileSystemItemManagerService.move(srcFsItemId, destFsItemId, principal);
      fail("Move to a non folder item should fail.");
    } catch (NuxeoException e) {
      assertEquals(
          String.format(
              "Cannot move a file system item to file system item with id %s because it is not a folder.",
              DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId()),
          e.getMessage());
    }

    // Move to a FolderItem
    destFsItemId = DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + subFolder.getId();
    FileSystemItem movedFsItem =
        fileSystemItemManagerService.move(srcFsItemId, destFsItemId, principal);
    assertEquals(srcFsItemId, movedFsItem.getId());
    assertEquals(destFsItemId, movedFsItem.getParentId());
    assertEquals("aNote.txt", movedFsItem.getName());
    note = session.getDocument(note.getRef());
    assertEquals("/syncRoot1/aFolder/aSubFolder/aNote", note.getPathAsString());
    assertEquals("aNote", note.getTitle());
  }
  @Test
  public void testReadOperations() throws Exception {

    // ------------------------------------------------------
    // Check #getTopLevelFolder
    // ------------------------------------------------------
    List<FileSystemItem> topLevelChildren =
        fileSystemItemManagerService.getTopLevelFolder(principal).getChildren();
    assertNotNull(topLevelChildren);
    assertEquals(2, topLevelChildren.size());

    FileSystemItem childFsItem = topLevelChildren.get(0);
    assertTrue(childFsItem instanceof DefaultSyncRootFolderItem);
    assertEquals("defaultSyncRootFolderItemFactory#test#" + syncRoot1.getId(), childFsItem.getId());
    assertTrue(childFsItem.getParentId().endsWith("DefaultTopLevelFolderItemFactory#"));
    assertEquals("syncRoot1", childFsItem.getName());

    childFsItem = topLevelChildren.get(1);
    assertTrue(childFsItem instanceof DefaultSyncRootFolderItem);
    assertEquals("defaultSyncRootFolderItemFactory#test#" + syncRoot2.getId(), childFsItem.getId());
    assertTrue(childFsItem.getParentId().endsWith("DefaultTopLevelFolderItemFactory#"));
    assertEquals("syncRoot2", childFsItem.getName());

    // ------------------------------------------------------
    // Check #exists
    // ------------------------------------------------------
    // Non existent doc id
    assertFalse(
        fileSystemItemManagerService.exists(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + "nonExistentId", principal));
    // File
    assertTrue(
        fileSystemItemManagerService.exists(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId(), principal));
    // Not adaptable as a FileSystemItem
    assertFalse(
        fileSystemItemManagerService.exists(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + notAFileSystemItem.getId(), principal));
    // Deleted
    custom.followTransition("delete");
    assertFalse(
        fileSystemItemManagerService.exists(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + custom.getId(), principal));

    // ------------------------------------------------------------
    // Check #getFileSystemItemById(String id, Principal principal)
    // ------------------------------------------------------------
    // Folder
    FileSystemItem fsItem =
        fileSystemItemManagerService.getFileSystemItemById(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), principal);
    assertNotNull(fsItem);
    assertTrue(fsItem instanceof FolderItem);
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), fsItem.getId());
    String expectedSyncRoot1Id = DEFAULT_SYNC_ROOT_ITEM_ID_PREFIX + syncRoot1.getId();
    assertEquals(expectedSyncRoot1Id, fsItem.getParentId());
    assertEquals("Jack's folder", fsItem.getName());
    assertTrue(fsItem.isFolder());
    assertTrue(fsItem.getCanRename());
    assertTrue(fsItem.getCanDelete());
    assertTrue(((FolderItem) fsItem).getCanCreateChild());
    List<FileSystemItem> children = ((FolderItem) fsItem).getChildren();
    assertNotNull(children);
    assertEquals(4, children.size());

    // File
    fsItem =
        fileSystemItemManagerService.getFileSystemItemById(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId(), principal);
    assertNotNull(fsItem);
    assertTrue(fsItem instanceof FileItem);
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId(), fsItem.getId());
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), fsItem.getParentId());
    assertEquals("Joe.odt", fsItem.getName());
    assertFalse(fsItem.isFolder());
    assertTrue(fsItem.getCanRename());
    assertTrue(fsItem.getCanDelete());
    FileItem fileFsItem = (FileItem) fsItem;
    assertTrue(fileFsItem.getCanUpdate());
    assertEquals(
        "nxfile/test/" + file.getId() + "/blobholder:0/Joe.odt", fileFsItem.getDownloadURL());
    assertEquals("MD5", fileFsItem.getDigestAlgorithm());
    assertEquals(file.getAdapter(BlobHolder.class).getBlob().getDigest(), fileFsItem.getDigest());
    Blob fileItemBlob = fileFsItem.getBlob();
    assertEquals("Joe.odt", fileItemBlob.getFilename());
    assertEquals("Content of Joe's file.", fileItemBlob.getString());

    // FolderishFile
    fsItem =
        fileSystemItemManagerService.getFileSystemItemById(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folderishFile.getId(), principal);
    assertNotNull(fsItem);
    assertTrue(fsItem instanceof FolderItem);
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folderishFile.getId(), fsItem.getId());
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), fsItem.getParentId());
    assertEquals("Sarah's folderish file", fsItem.getName());
    assertTrue(fsItem.isFolder());
    assertTrue(fsItem.getCanRename());
    assertTrue(fsItem.getCanDelete());
    assertTrue(((FolderItem) fsItem).getCanCreateChild());
    assertTrue(((FolderItem) fsItem).getChildren().isEmpty());

    // Not adaptable as a FileSystemItem
    fsItem =
        fileSystemItemManagerService.getFileSystemItemById(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + notAFileSystemItem.getId(), principal);
    assertNull(fsItem);

    // Deleted
    assertNull(
        fileSystemItemManagerService.getFileSystemItemById(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + custom.getId(), principal));

    // Sub folder
    fsItem =
        fileSystemItemManagerService.getFileSystemItemById(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + subFolder.getId(), principal);
    assertNotNull(fsItem);
    assertTrue(fsItem instanceof FolderItem);
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + subFolder.getId(), fsItem.getId());
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), fsItem.getParentId());
    assertEquals("Tony's sub folder", fsItem.getName());
    assertTrue(fsItem.isFolder());
    assertTrue(fsItem.getCanRename());
    assertTrue(fsItem.getCanDelete());
    assertTrue(((FolderItem) fsItem).getCanCreateChild());
    assertTrue(((FolderItem) fsItem).getChildren().isEmpty());

    // -------------------------------------------------------------------
    // Check #getFileSystemItemById(String id, String parentId, Principal
    // principal)
    // -------------------------------------------------------------------
    fsItem =
        fileSystemItemManagerService.getFileSystemItemById(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId(),
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(),
            principal);
    assertTrue(fsItem instanceof FileItem);
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId(), fsItem.getId());
    assertEquals(DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), fsItem.getParentId());

    // ------------------------------------------------------
    // Check #getChildren
    // ------------------------------------------------------
    // Need to flush VCS cache for the session used in DocumentBackedFolderItem#getChildren() to be
    // aware of changes
    // in the current session
    session.save();
    children =
        fileSystemItemManagerService.getChildren(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), principal);
    assertNotNull(children);

    assertEquals(4, children.size());
    // Ordered
    checkChildren(
        children,
        folder.getId(),
        file.getId(),
        note.getId(),
        folderishFile.getId(),
        subFolder.getId(),
        true);

    children =
        fileSystemItemManagerService.getChildren(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + subFolder.getId(), principal);
    assertTrue(children.isEmpty());

    // ------------------------------------------------------
    // Check #scrollDescendants
    // ------------------------------------------------------
    // Need to flush VCS cache for the session used in DocumentBackedFolderItem#scrollDescendants to
    // be aware of
    // changes in the current session
    session.save();
    FolderItem folderItem =
        (FolderItem)
            fileSystemItemManagerService.getFileSystemItemById(
                DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), principal);
    assertTrue(folderItem.getCanScrollDescendants());

    // Scroll through all descendants in one breath
    ScrollFileSystemItemList folderDescendants =
        fileSystemItemManagerService.scrollDescendants(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + folder.getId(), principal, null, 10, 1000);
    assertNotNull(folderDescendants);
    assertNotNull(folderDescendants.getScrollId());
    assertEquals(4, folderDescendants.size());
    // Order is not determined
    checkChildren(
        folderDescendants,
        folder.getId(),
        file.getId(),
        note.getId(),
        folderishFile.getId(),
        subFolder.getId(),
        false);

    // Scroll through descendants in several steps
    folderDescendants.clear();
    ScrollFileSystemItemList descendantsBatch;
    int batchSize = 2;
    String scrollId = null;
    while (!(descendantsBatch = folderItem.scrollDescendants(scrollId, batchSize, 1000))
        .isEmpty()) {
      assertTrue(descendantsBatch.size() > 0);
      scrollId = descendantsBatch.getScrollId();
      folderDescendants.addAll(descendantsBatch);
    }
    assertEquals(4, folderDescendants.size());
    // Order is not determined
    checkChildren(
        folderDescendants,
        folder.getId(),
        file.getId(),
        note.getId(),
        folderishFile.getId(),
        subFolder.getId(),
        false);

    folderDescendants =
        fileSystemItemManagerService.scrollDescendants(
            DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + subFolder.getId(), principal, null, 10, 1000);
    assertTrue(folderDescendants.isEmpty());

    // ------------------------------------------------------
    // Check #canMove
    // ------------------------------------------------------
    // Not allowed to move a file system item to a non FolderItem
    String srcFsItemId = DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + note.getId();
    String destFsItemId = DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + file.getId();
    assertFalse(fileSystemItemManagerService.canMove(srcFsItemId, destFsItemId, principal));

    // Not allowed to move a file system item if no REMOVE permission on the
    // source backing doc
    Principal joePrincipal = new NuxeoPrincipalImpl("joe");
    DocumentModel rootDoc = session.getRootDocument();
    setPermission(rootDoc, "joe", SecurityConstants.READ, true);
    nuxeoDriveManager.registerSynchronizationRoot(joePrincipal, syncRoot1, session);

    // Under Oracle, the READ ACL optims are not visible from the joe
    // session while the transaction has not been committed.
    TransactionHelper.commitOrRollbackTransaction();
    TransactionHelper.startTransaction();

    destFsItemId = DEFAULT_FILE_SYSTEM_ITEM_ID_PREFIX + subFolder.getId();
    assertFalse(fileSystemItemManagerService.canMove(srcFsItemId, destFsItemId, joePrincipal));

    // Not allowed to move a file system item if no ADD_CHILDREN permission
    // on the destination backing doc
    setPermission(folder, "joe", SecurityConstants.WRITE, true);
    setPermission(subFolder, "joe", SecurityConstants.READ, true);
    setPermission(subFolder, SecurityConstants.ADMINISTRATOR, SecurityConstants.EVERYTHING, true);
    setPermission(subFolder, SecurityConstants.EVERYONE, SecurityConstants.EVERYTHING, false);
    assertFalse(fileSystemItemManagerService.canMove(srcFsItemId, destFsItemId, joePrincipal));

    // OK: REMOVE permission on the source backing doc + REMOVE_CHILDREN
    // permission on its parent + ADD_CHILDREN permission on the destination
    // backing doc
    resetPermissions(subFolder, SecurityConstants.EVERYONE);
    resetPermissions(subFolder, "joe");
    setPermission(subFolder, "joe", SecurityConstants.WRITE, true);
    assertTrue(fileSystemItemManagerService.canMove(srcFsItemId, destFsItemId, joePrincipal));

    // Reset permissions
    resetPermissions(rootDoc, "joe");
    resetPermissions(folder, "joe");
    resetPermissions(subFolder, "joe");
  }