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Microservice Testing with Apache Spark

2 posts · May 2026 – Jun 2026

What this trail covers

This post continues the evolution of microservice testing with Apache Spark, focusing on building a repeatable replay harness. It builds upon the initial post by detailing the practical implementation of using Spark to test services with complex input dependencies, aiming to improve test coverage and efficiency without creating a second implementation of the service.

All Stripe trails
  1. Scaling up your microservice testing with Apache Spark—Part 2This post details the practical implementation of using Apache Spark to build a repeatable replay harness for testing microservices with complex input dependencies. It focuses on improving test coverage and efficiency without creating a second implementation of the service.
  2. Scaling up your microservice testing with Apache SparkThis post details how Apache Spark's parallelism and scalability can be leveraged to build a regression test harness for microservices with a long tail of inputs that are hard to model by hand. It enables comparison of old and new implementations, modeling of upcoming rule changes, and quantification of impact before changes reach production.