class_docstr: Test how metadata is combined.
class_docstr_tok: ["Test","how","metadata","is","combined","."]
docstr: Set up the test case.
docstr_tok: ["Set","up","the","test","case","."]
code: def setUp(self):
      """Set up the test case."""
      self.datetime_dts = (
          {"start_time": datetime(2018, 2, 1, 11, 58, 0)},
          {"start_time": datetime(2018, 2, 1, 11, 59, 0)},
          {"start_time": datetime(2018, 2, 1, 12, 0, 0)},
          {"start_time": datetime(2018, 2, 1, 12, 1, 0)},
          {"start_time": datetime(2018, 2, 1, 12, 2, 0)},
      )
  
imports: import unittest
  from datetime import datetime
  import numpy
  import pytest
  from satpy.dataset.dataid import DataID, DataQuery, ModifierTuple, WavelengthRange, minimal_default_keys_config
  from satpy.readers.pmw_channels_definitions import FrequencyDoubleSideBand, FrequencyQuadrupleSideBand, FrequencyRange
  from satpy.tests.utils import make_cid, make_dataid, make_dsq
label_desc: Use image node_id 1 for calling the TestCombineMetadata obj's underlying member method code with example usage: obj.setUp() without return types