code: def testInvalidDuration(self):
      message = duration_pb2.Duration()
      self.assertRaisesRegexp(
          well_known_types.ParseError,
          'Duration must end with letter "s": 1.',
          message.FromJsonString,
          "1",
      )
      self.assertRaisesRegexp(
          well_known_types.ParseError,
          "Couldn't parse duration: 1...2s.",
          message.FromJsonString,
          "1...2s",
      )
      text = "-315576000001.000000000s"
      self.assertRaisesRegexp(
          well_known_types.Error,
          r"Duration is not valid\: Seconds -315576000001 must be in range"
          r" \[-315576000000\, 315576000000\].",
          message.FromJsonString,
          text,
      )
      text = "315576000001.000000000s"
      self.assertRaisesRegexp(
          well_known_types.Error,
          r"Duration is not valid\: Seconds 315576000001 must be in range"
          r" \[-315576000000\, 315576000000\].",
          message.FromJsonString,
          text,
      )
      message.seconds = -315576000001
      message.nanos = 0
      self.assertRaisesRegexp(
          well_known_types.Error,
          r"Duration is not valid\: Seconds -315576000001 must be in range"
          r" \[-315576000000\, 315576000000\].",
          message.ToJsonString,
      )
  
imports: from datetime import datetime
  from google.protobuf import any_pb2
  from google.protobuf import duration_pb2
  from google.protobuf import field_mask_pb2
  from google.protobuf import struct_pb2
  from google.protobuf import timestamp_pb2
  from google.protobuf import unittest_pb2
  from google.protobuf.internal import any_test_pb2
  from google.protobuf.internal import test_util
  from google.protobuf.internal import well_known_types
  from google.protobuf import descriptor
  from google.protobuf import text_format
label_desc: Use image node_id 8 for calling the TimeUtilTest obj's underlying member method code with example usage: obj.testInvalidDuration() without return types