ninth pass

Author: jack-berg

sdk/testing/src/main/java/io/opentelemetry/sdk/testing/exporter/InMemoryMetricExporter.java

@@ -100,6 +100,7 @@ public void reset() {
 
   @Override
   public AggregationTemporality getAggregationTemporality(InstrumentType instrumentType) {
+    Objects.requireNonNull(instrumentType, "instrumentType");
     return aggregationTemporality;
   }
 

sdk/testing/src/main/java/io/opentelemetry/sdk/testing/exporter/InMemoryMetricReader.java

@@ -124,11 +124,13 @@ public void register(CollectionRegistration collectionRegistration) {
 
   @Override
   public AggregationTemporality getAggregationTemporality(InstrumentType instrumentType) {
+    Objects.requireNonNull(instrumentType, "instrumentType");
     return aggregationTemporalitySelector.getAggregationTemporality(instrumentType);
   }
 
   @Override
   public Aggregation getDefaultAggregation(InstrumentType instrumentType) {
+    Objects.requireNonNull(instrumentType, "instrumentType");
     return defaultAggregationSelector.getDefaultAggregation(instrumentType);
   }