class_docstr: Test HSAF Reader.
class_docstr_tok: ["Test","HSAF","Reader","."]
docstr: Test the init function, ensure that the correct dates and metadata are returned.
docstr_tok: ["Test","the","init","function",",","ensure","that","the","correct","dates","and","metadata","are","returned","."]
code: def test_init(self, pg):
      """Test the init function, ensure that the correct dates and metadata are returned."""
      pg.open.return_value = FakeGRIB()
      correct_dt = datetime(2019, 6, 3, 16, 45, 0)
      from satpy.readers.hsaf_grib import HSAFFileHandler
  
      fh = HSAFFileHandler(
          "filename", mock.MagicMock(), mock.MagicMock()
      )
      assert fh._analysis_time == correct_dt
      assert fh.metadata["projparams"]["lat_0"] == 0.0
      assert fh.metadata["shortName"] == "irrate"
      assert fh.metadata["nx"] == 3712
  
imports: import sys
  import unittest
  from datetime import datetime
  from unittest import mock
  import numpy
  from pytest import approx
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 3 for calling the TestHSAFFileHandler obj's underlying member method code with example usage: obj.test_init(pg) without return types