class_docstr: Test the MITIFF Writer class.
docstr: Test basic writer operation with 3 bands with DataQuery prerequisites with missing name.
docstr_tok: ["Test","basic","writer","operation","with","3","bands","with","DataQuery","prerequisites","with","missing","name","."]
code: def test_get_test_dataset_three_bands_prereq(self):
      """Test basic writer operation with 3 bands with DataQuery prerequisites with missing name."""
      from satpy.writers.mitiff import MITIFFWriter
  
      dataset = self._get_test_dataset_three_bands_prereq()
      w = MITIFFWriter(base_dir=self.base_dir)
      w.save_dataset(dataset)
      filename = "{:s}_{:%Y%m%d_%H%M%S}.mitiff".format(
          dataset.attrs["name"], dataset.attrs["start_time"]
      )
      imgdesc = self._imagedescription_from_mitiff(
          os.path.join(self.base_dir, filename)
      )
      for element in imgdesc:
          if " Channels:" in element:
              assert element == " Channels: 3 In this file: 1 2 3"
  
imports: import logging
  import os
  import unittest
  import numpy
  from PIL import Image
label_desc: Use image node_id 28 for calling the TestMITIFFWriter obj's underlying member method code with example usage: obj.test_get_test_dataset_three_bands_prereq() without return types