code: def test_add_metric_passing(self):
      metrics_cache_obj = MetricsCacheYamlImpl(
          os.path.join(dir_path, "metrics.yaml")
      )
      metrics_cache_obj.add_metric(
          name="test_add_metric_passing",
          value=1,
          unit="ms",
          dimensions=[
              Dimension("ModelName", "testModel"),
              Dimension("Host", "testHost"),
          ],
          metric_type=MetricTypes.GAUGE,
      )
      assert MetricTypes.GAUGE in metrics_cache_obj.cache.keys()
      assert (
          "test_add_metric_passing"
          in metrics_cache_obj.cache[MetricTypes.GAUGE].keys()
      )
  
imports: import os
  import uuid
  import pytest
  import ts.metrics.metric_cache_errors
  from ts.metrics.caching_metric import CachingMetric
  from ts.metrics.dimension import Dimension
  from ts.metrics.metric_cache_yaml_impl import MetricsCacheYamlImpl
  from ts.metrics.metric_type_enum import MetricTypes
label_desc: Use image node_id 9 for calling the TestAddMetrics obj's underlying member method code with example usage: obj.test_add_metric_passing() without return types