code: def test_make_ref_reader_with_true_case(self, fasta_filename):
      fasta_path = test_utils.genomics_core_testdata(fasta_filename)
      with fasta.IndexedFastaReader(
          fasta_path, keep_true_case=True
      ) as reader:
          self.assertEqual(
              reader.query(ranges.make_range("chrM", 22, 27)), "TaaCC"
          )
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import absltest
  from absl.testing import parameterized
  import six
  from third_party.nucleus.io import fasta
  from third_party.nucleus.io.python import reference
  from third_party.nucleus.testing import test_utils
  from third_party.nucleus.util import ranges
label_desc: Use image node_id 2 for calling the IndexedFastaReaderTests obj's underlying member method code with example usage: obj.test_make_ref_reader_with_true_case(fasta_filename) without return types