code: def test_push_git_annex_branch_when_no_data(path=None):
      path = Path(path)
      ds = Dataset(path / "a").create()
      target = mk_push_target(
          ds, "target", str(path / "target"), annex=False, bare=True
      )
      (ds.pathobj / "f0").write_text("0")
      ds.save()
      ds.push(to="target", data="nothing")
      assert_in(
          "git-annex",
          {
              d["refname:strip=2"]
              for d in target.for_each_ref_(fields="refname:strip=2")
          },
      )
  
imports: import logging
  import os
  import pytest
  from datalad.core.distributed.clone import Clone
  from datalad.core.distributed.push import Push
  from datalad.distribution.dataset import Dataset
  from datalad.support.annexrepo import AnnexRepo
  from datalad.support.exceptions import IncompleteResultsError, InsufficientArgumentsError
  from datalad.support.external_versions import external_versions
  from datalad.support.gitrepo import GitRepo
  from datalad.support.network import get_local_file_url
  from datalad.tests.utils_pytest import DEFAULT_BRANCH, DEFAULT_REMOTE, SkipTest, assert_false, assert_in, assert_in_results, assert_not_in, assert_not_in_results, assert_raises, assert_repo_status, assert_result_count, assert_status, eq_, known_failure_githubci_osx, known_failure_githubci_win, neq_, ok_, ok_file_has_content, serve_path_via_http, skip_if_adjusted_branch, skip_if_on_windows, skip_ssh, slow, swallow_logs, with_tempfile, with_tree
  from datalad.utils import Path, chpwd, path_startswith, swallow_outputs
label_desc: Use image node_id 17 for calling a global function with example usage: test_push_git_annex_branch_when_no_data(path) without return types