code: def fake_file(tmp_path):
      """Return file path to level1b file."""
      file_path = tmp_path / "test_file_ici_l1b_nc.nc"
      writer = IciL1bFakeFileWriter(file_path)
      writer.write()
      return file_path
  
imports: from datetime import datetime
  from unittest.mock import patch
  import numpy
  import pytest
  import xarray
  from netCDF4 import Dataset
  from satpy.readers.ici_l1b_nc import IciL1bNCFileHandler, InterpolationType
label_desc: Use image node_id 2 for calling a global function with example usage: fake_file(tmp_path) and returns: file_path