Add test for watcher log delegation

pkg/transformers/shared/log_chunker.go

@@ -48,6 +48,8 @@ func (chunker LogChunker) ChunkLogs(logs []types.Log) map[string][]types.Log {
 	for _, log := range logs {
 		// Topic0 is not unique to each transformer, also need to consider the contract address
 		relevantTransformers := chunker.AddressToNames[log.Address.String()]
+
+		// TODO What should happen if log can't be assigned?
 		for _, transformer := range relevantTransformers {
 			if chunker.NameToTopic0[transformer] == log.Topics[0] {
 				chunks[transformer] = append(chunks[transformer], log)