code: def service(self, mocker):
      service = object.__new__(Service)
      service._entry_point = mocker.MagicMock(
          return_value=["prediction"]
      )
      metrics_cache = MetricsCacheYamlImpl(
          os.path.join(
              os.path.abspath(
                  "ts/tests/unit_tests/metrics_yaml_testing"
              ),
              "metrics.yaml",
          )
      )
      service._context = Context(
          self.model_name,
          self.model_dir,
          self.manifest,
          1,
          0,
          "1.0",
          True,
          metrics_cache,
      )
      return service
  
file_path: serve/ts/tests/unit_tests/test_worker_service.py
imports: import logging
  import os
  import pytest
  from ts.context import Context
  from ts.service import Service
  from ts.service import emit_metrics
  from ts.metrics.metric_cache_yaml_impl import MetricsCacheYamlImpl
label_desc: Use image node_id 1 for calling the TestService obj's underlying member method code with example usage: obj.service(mocker) and returns: service