class_docstr: Tests for BedWriter.
class_docstr_tok: ["Tests","for","BedWriter","."]
code: def setUp(self):
      self.records = [
          bed_pb2.BedRecord(
              reference_name="chr1",
              start=30,
              end=40,
              name="first",
              score=55.5,
          ),
          bed_pb2.BedRecord(
              reference_name="chr2",
              start=32,
              end=38,
              name="second",
              score=0,
          ),
          bed_pb2.BedRecord(
              reference_name="chr3",
              start=40,
              end=50,
              name="third",
              score=99,
          ),
      ]
      self.tokens = [
          [
              "chr1",
              "30",
              "40",
              "first",
              "55.5",
              "+",
              "35",
              "38",
              "128,242,16",
              "2",
              "5,3",
              "30,37",
          ],
          [
              "chr2",
              "32",
              "38",
              "second",
              "0",
              ".",
              "32",
              "38",
              "128,128,128",
              "1",
              "6",
              "32",
          ],
          [
              "chr3",
              "40",
              "50",
              "third",
              "99",
              "-",
              "40",
              "44",
              "0,0,0",
              "3",
              "40,43,48",
              "3,2,2",
          ],
      ]
  
file_path: deepvariant/third_party/nucleus/io/bed_test.py
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
  from third_party.nucleus.io import bed
  from third_party.nucleus.io.python import bed_reader
  from third_party.nucleus.protos import bed_pb2
  from third_party.nucleus.testing import test_utils
label_desc: Use image node_id 1 for calling the BedWriterTests obj's underlying member method code with example usage: obj.setUp() without return types