def are_dir_trees_equal(dir1, dir2):
        """
        Compare two directories recursively. Files in each directory are
        assumed to be equal if their names and contents are equal.

        NB: retreived from: https://stackoverflow.com/a/6681395

        @param dir1: First directory path
        @param dir2: Second directory path

        @return: True if the directory trees are the same and 
            there were no errors while accessing the directories or files, 
            False otherwise.
        """

        dirs_cmp = filecmp.dircmp(dir1, dir2)
        if len(dirs_cmp.left_only) > 0 or len(dirs_cmp.right_only) > 0 or \
                len(dirs_cmp.funny_files) > 0:
            return False
        (_, mismatch, errors) = filecmp.cmpfiles(
            dir1, dir2, dirs_cmp.common_files, shallow=False)
        if len(mismatch) > 0 or len(errors) > 0:
            return False
        for common_dir in dirs_cmp.common_dirs:
            new_dir1 = os.path.join(dir1, common_dir)
            new_dir2 = os.path.join(dir2, common_dir)
            if not are_dir_trees_equal(new_dir1, new_dir2):
                return False
        return True

        Compare two directories recursively. Files in each directory are
        assumed to be equal if their names and contents are equal.

        NB: retreived from: https://stackoverflow.com/a/6681395

        @param dir1: First directory path
        @param dir2: Second directory path

        @return: True if the directory trees are the same and 
            there were no errors while accessing the directories or files, 
            False otherwise.
        
e2etests/test_device_sync.py