code: def test_invalid_pre_threshold(self, pre_threshold):
      with self.assertRaisesRegex(
          ValueError, "pre_threshold has to be positive integer"
      ):
          pipeline_dp.AggregateParams(
              noise_kind=pipeline_dp.NoiseKind.GAUSSIAN,
              max_partitions_contributed=1,
              max_contributions_per_partition=1,
              metrics=[pipeline_dp.Metrics.COUNT],
              pre_threshold=pre_threshold,
          )
  
imports: from absl.testing import parameterized
  import pipeline_dp
  from pipeline_dp import budget_accounting, aggregate_params
label_desc: Use image node_id 4 for calling the AggregateParamsTest obj's underlying member method code with example usage: obj.test_invalid_pre_threshold(pre_threshold) without return types