code: def setUpClass(cls):
      cls.fasta_reader = fasta.IndexedFastaReader(
          test_utils.genomics_core_testdata("test.fasta")
      )
  
      cls.in_mem = fasta.InMemoryFastaReader(
          [
              (
                  contig.name,
                  0,
                  cls.fasta_reader.query(
                      ranges.make_range(contig.name, 0, contig.n_bases)
                  ),
              )
              for contig in cls.fasta_reader.header.contigs
          ]
      )
  
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 1 for calling the InMemoryFastaReaderTests obj's underlying member method code with example usage: obj.setUpClass(cls) without return types