Testing an Event-Driven System

Andy Chambers takes us through how to test an event-driven system:

Each distinct service has a nice, pure data model with extensive unit tests, but now with new clients (and consequently new requirements) coming thick and fast, the number of these services is rapidly increasing. The testing guardian angel who sometimes visits your thoughts during your morning commute has noticed an increase in the release of bugs that could have been prevented with better integration tests.

Finally after a few incidents in production, and with velocity slowing down due to the deployment pipeline frequently being clogged up by flaky integration tests, you start to think about what you want from your test suite. You set off looking for ideas to make really solid end-to-end tests. You wonder if it’s possible to make them fast. You think about all the things you could do with the time freed up by not having to apply manual data fixes that correct for deploying bad code.

At the end of it all, hopefully you’ll arrive here and learn about the Test Machine.

Check it out. Testing these types of system is certainly possible, but can be a bit difficult because of the additional layers of complexity.

Related Posts

Temporal Tables with Flink

Marta Paes shows off a new feature in Apache Flink: In the 1.7 release, Flink has introduced the concept of temporal tables into its streaming SQL and Table API: parameterized views on append-only tables — or, any table that only allows records to be inserted, never updated or deleted — that are interpreted as a changelog and […]

Read More

Auto-Terminating Unused EMR Clusters

Praveen Krishamoorthy Ravikumar shows how you can use AWS Lambda to terminate ElasticMapReduce clusters which have been idle for a certain amount of time: To avoid this overhead, you must track the idleness of the EMR cluster and terminate it if it is running idle for long hours. There is the Amazon EMR native IsIdle Amazon […]

Read More

Categories

April 2019
MTWTFSS
« Mar May »
1234567
891011121314
15161718192021
22232425262728
2930