class_docstr: Test IASI L2 reader.
class_docstr_tok: ["Test","IASI","L2","reader","."]
docstr: Test _form_datetimes() function.
docstr_tok: ["Test","_form_datetimes","(",")","function","."]
code: def test_form_datetimes(self):
      """Test _form_datetimes() function."""
      from satpy.readers.iasi_l2 import _form_datetimes
  
      days = TEST_DATA["L1C"]["SensingTime_day"]["data"]
      msecs = TEST_DATA["L1C"]["SensingTime_msec"]["data"]
      times = _form_datetimes(days, msecs)
      self.check_sensing_times(times)
  
imports: import math
  import os
  import unittest
  import numpy
  import pytest
  import xarray
label_desc: Use image node_id 16 for calling the TestIasiL2 obj's underlying member method code with example usage: obj.test_form_datetimes() without return types