Architecting for Testability

Jul 17, 2022 • 3 min

If you are a developer you are probably working on a large and complicated codebase. Unfortunately a lot of existing code lacks automated tests and adding them can be challenging, particularly if the code is old or poorly structured. Testability has always been an aspect of architecture that people have said is important but all too often I see this aspect ignored. Approval testing is a technique that helps you to get a difficult codebase under test and begin to control your technical debt. Approval testing works best on larger pieces of code where you want to test for multiple things. Because of this, the architecture of the system is really important for success with this testing technique.

The Fallacy of the 100% Code Coverage

Mar 19, 2022 • 6 min

Is pursuing 100% code coverage a good or a bad thing? Code coverage is an interesting metric. However, 100% code coverage is a crappy target. It encourages gaming.

Acceptance Testing for Continuous Delivery

Jul 18, 2021 • 10 min

Dave Farley describes approaches to acceptance testing that allow teams to work quickly and effectively, build functional coverage tests and maintain those tests throughout change.

Testable IAM Policy documents

Jun 6, 2021 • 12 min

Pulumi is the new kid on the block in the cloud infrastructure as code arena. I was relieved to find Pulumi. Finally, we have testable Infrastructure as Code. We can write fast unit tests that we can execute locally without needing the cloud. However, I was a bit disappointed. Pulumi does not have a full representation of IAM Policy documents. Fortunately, it was relatively easy to build a library that did this!

Kickstart your Performance Testing

Apr 13, 2021 • 4 min

My notes from a performance testing workshop I followed at AADays 2018 in Poland. It was my very first encounter with performance testing.

Analytics rebooted - a workshop

Apr 13, 2021 • 7 min

My notes from the Anand Bagmar’s Analytics workshop I followed at AADays 2018 in Poland.

Interview with Thierry de Pauw — about his journey with Continuous Delivery

Oct 2, 2018 • 17 min

In this post, Leena interviews Thierry de Pauw, a Software Engineer who coaches on Continuous Delivery and other Software Engineering Practices. His focus is helping teams to improve the flow of software delivery.