class_docstr: Fake image.
class_docstr_tok: ["Fake","image","."]
docstr: Return dummy scale and offset.
docstr_tok: ["Return","dummy","scale","and","offset","."]
code: def get_scaling_from_history(self):
      """Return dummy scale and offset."""
      return xr.DataArray(1), xr.DataArray(0)
  
file_path: satpy/satpy/tests/writer_tests/test_ninjotiff.py
imports: import sys
  import unittest
  from unittest import mock
  import numpy
  import pytest
  import xarray
label_desc: Use image node_id 2 for calling the FakeImage obj's underlying member method code with example usage: obj.get_scaling_from_history() and returns: xr,  xr