update otlp serialization test with unique ptr

Author: ethandmd

exporters/otlp/test/otlp_metrics_serialization_test.cc

@@ -144,10 +144,10 @@ static metrics_sdk::MetricData CreateExponentialHistogramAggregationData(
   s_data_1.scale_            = 3;
   s_data_1.record_min_max_   = true;
   s_data_1.zero_count_       = 1;
-  s_data_1.positive_buckets_ = opentelemetry::sdk::metrics::AdaptingCircularBufferCounter(10);
-  s_data_1.negative_buckets_ = opentelemetry::sdk::metrics::AdaptingCircularBufferCounter(10);
-  s_data_1.positive_buckets_.Increment(1, 1);
-  s_data_1.negative_buckets_.Increment(-2, 1);
+  s_data_1.positive_buckets_ = std::make_unique<opentelemetry::sdk::metrics::AdaptingCircularBufferCounter>(10);
+  s_data_1.negative_buckets_ = std::make_unique<opentelemetry::sdk::metrics::AdaptingCircularBufferCounter>(10);
+  s_data_1.positive_buckets_->Increment(1, 1);
+  s_data_1.negative_buckets_->Increment(-2, 1);
 
   s_data_2.count_            = 4;
   s_data_2.sum_              = 6.2;
@@ -156,11 +156,11 @@ static metrics_sdk::MetricData CreateExponentialHistogramAggregationData(
   s_data_2.scale_            = 3;
   s_data_2.record_min_max_   = false;
   s_data_2.zero_count_       = 2;
-  s_data_2.positive_buckets_ = opentelemetry::sdk::metrics::AdaptingCircularBufferCounter(10);
-  s_data_2.negative_buckets_ = opentelemetry::sdk::metrics::AdaptingCircularBufferCounter(10);
-  s_data_2.positive_buckets_.Increment(3, 1);
-  s_data_2.negative_buckets_.Increment(-2, 1);
-  s_data_2.negative_buckets_.Increment(-4, 2);
+  s_data_2.positive_buckets_ = std::make_unique<opentelemetry::sdk::metrics::AdaptingCircularBufferCounter>(10);
+  s_data_2.negative_buckets_ = std::make_unique<opentelemetry::sdk::metrics::AdaptingCircularBufferCounter>(10);
+  s_data_2.positive_buckets_->Increment(3, 1);
+  s_data_2.negative_buckets_->Increment(-2, 1);
+  s_data_2.negative_buckets_->Increment(-4, 2);
 
   data.aggregation_temporality = metrics_sdk::AggregationTemporality::kCumulative;
   data.end_ts                  = opentelemetry::common::SystemTimestamp(now_time);