code: def test_tracking_uncommitted_changes(self, repo, environment):
      file = repo.working_dir + "/some_file.txt"
      with open(file, "w") as fp:
          fp.write("some-content\n")
  
      repo.git.add(file)
  
      with neptune.init_run(
          project=environment.project,
          git_ref=GitRef(repository_path=repo.working_dir),
      ) as run:
          run.sync()
          assert run.exists("source_code/diff")
          run["source_code/diff"].download()
          with open("diff.patch") as fp:
              assert "some-content" in fp.read()
  
imports: import pytest
  import neptune
  from neptune.exceptions import NeptuneModelKeyAlreadyExistsError
  from neptune.metadata_containers import Model, Project
  from neptune.types import GitRef
  from tests.e2e.base import AVAILABLE_CONTAINERS, BaseE2ETest, fake
  from tests.e2e.utils import initialize_container, reinitialize_container, with_check_if_file_appears
label_desc: Use image node_id 8 for calling the TestInitRun obj's underlying member method code with example usage: obj.test_tracking_uncommitted_changes(repo, environment) without return types