docstr: If the installed git is older than 2.7, certain repo operations
  prompt the user for credentials. We don't want to do this, so
  repo.is_valid() returns False for old gits.
docstr_tok: ["If","the","installed","git","is","older","than","2.7",",","certain","repo","operations","prompt","the","user","for","credentials",".","We","do","n't","want","to","do","this",",","so","repo.is_valid","(",")","returns","False","for","old","gits","."]
code: def test_old_git_version(self):
      """If the installed git is older than 2.7, certain repo operations
      prompt the user for credentials. We don't want to do this, so
      repo.is_valid() returns False for old gits.
      """
      with patch(
          "git.repo.base.Repo.GitCommandWrapperType"
      ) as git_mock, patch("streamlit.git_util.os"):
          git_mock.return_value.version_info = (
              1,
              6,
              4,
          )  # An old git version
          repo = GitRepo(".")
          self.assertFalse(repo.is_valid())
          self.assertEqual((1, 6, 4), repo.git_version)
  
file_path: streamlit/lib/tests/streamlit/git_util_test.py
imports: import unittest
  from unittest.mock import patch
  from git.exc import InvalidGitRepositoryError
  from streamlit.git_util import GITHUB_HTTP_URL, GITHUB_SSH_URL, GitRepo
label_desc: Use image node_id 4 for calling the GitUtilTest obj's underlying member method code with example usage: obj.test_old_git_version() without return types