In this chapter, you learned that testing, though it might seem unimportant, is essential and rather simple for graph data in Neo4j applications. You also learned about the Neo4j framework from GraphAware including the GraphUnit testing libraries for Unit tests. We saw how to test the performance of the Neo4j system and an introduction to benchmarking it using Gatling to obtain performance metrics. We also looked at ways to scale Neo4j applications, with Cache Sharding being an essential technique.

In the next chapter, we will be digging into the internals of Neo4j which affect the processing, storage, APIs, and performance of this amazing graph database.