CounterAgg returns a checkpointed counter aggregator w/ the specified descriptor and value.

LastValueAgg returns a checkpointed lastValue aggregator w/ the specified descriptor and value.

NewAggregationSelector returns a policy that is consistent with the test descriptors above.

Convenience method for building a test exported counter record.

Convenience method for building a test exported lastValue record.

CounterADesc and CounterBDesc group by "C".

GroupEncoder uses the SDK default encoder.

Labels1 has G=H and C=D.

Labels2 has C=D and E=F.

Labels3 is the empty set.

LastValueADesc and LastValueBDesc group by "G".

SdkEncoder uses a non-standard encoder like K1~V1&K2~V2.