Method empty

src/backend/HTML5FS.ts:260–295

* Deletes everything in the FS. Used for testing. * Karma clears the storage after you quit it but not between runs of the test * suite, and the tests expect an empty FS every time.

(mainCb: BFSOneArgCallback)

   * suite, and the tests expect an empty FS every time.
   */
  public empty(mainCb: BFSOneArgCallback): void {
    // Get a list of all entries in the root directory to delete them
    this._readdir('/', (err: ApiError, entries?: Entry[]): void => {
      if (err) {
        console.error('Failed to empty FS');
        mainCb(err);
      } else {
        // Called when every entry has been operated on
        const finished = (er: any): void => {
          if (err) {
            console.error("Failed to empty FS");
            mainCb(err);
          } else {
            mainCb();
          }
        };
        // Removes files and recursively removes directories
        const deleteEntry = (entry: Entry, cb: (e?: any) => void): void => {
          const succ = () => {
            cb();
          };
          const error = (err: DOMException) => {
            cb(convertError(err, entry.fullPath, !entry.isDirectory));
          };
          if (isDirectoryEntry(entry)) {
            entry.removeRecursively(succ, error);
          } else {
            entry.remove(succ, error);
          }
        };
        // Loop through the entries and remove them, then call the callback
        // when they're all finished.
        asyncEach(entries!, deleteEntry, finished);
      }
    });
  }

  public rename(oldPath: string, newPath: string, cb: BFSOneArgCallback): void {
    let semaphore: number = 2;