def test_get_default_branch(self):
        """Test that _get_default_branch returns the correct branch name."""
        branch = self.git_handler._get_default_branch()
        self.assertEqual(branch, 'main')

        # Verify the command was executed
        self.assertTrue(
            any(
                cmd == 'git --no-pager remote show origin | grep "HEAD branch"'
                for cmd, _ in self.executed_commands
            )
        )
Test that _get_default_branch returns the correct branch name.
tests/unit/test_git_handler.py