It’s been almost a year since my posts on Excel workbook snapshot testing and PDF snapshot testing. Both of these have proven to be very valuable in our automated test suite and have allowed us to easily catch regressions, manually inspect the differences, and then update as needed. Another task on my current project has […]
If your software team develops multiple new features simultaneously, you need to be able to deploy and test them in isolation. The gold standard for this is to use Heroku’s review apps, which are temporary environments automatically spun up for each pull request. Unfortunately, the feature only works with GitHub; if you’re using another source […]
I’ve been working on a REST API written in ASP.NET Core 2.1. Recently, our team wanted to write tests that exercised our business logic and also interacted with our database. I wasn’t able to find many examples of this online, so I was motivated to write this post and share our approach.
About a year ago, I was learning how to properly unit test Phoenix applications using the Mox library. The strategy I adopted for my side projects involves adding “module dependencies” to any module I want to unit test, and then using Mox to configure those dependencies during the tests. While that approach is great for […]
Modern development tools are super-convenient. XCode’s more recent builds let you debug an iOS app over WiFi, so you don’t have to succumb to the indignity of plugging in a Lightning cable (so 2017). React Native’s tooling goes a step farther, giving you the ability to run the native part of the app on a […]
On my current project, we are developing a replacement for a legacy system written in Visual FoxPro that our customer has used for the last couple of decades. Since there is a lot of risk in switching over, we have developed a bi-directional syncing tool that attempts to keep each system up-to-date with changes made […]
I previously wrote about building a Node app on VSTS Windows agents. Since then, we’ve started using headless Chrome on those agents. Here’s how.
As the ecosystem for Elixir matures more and more, there are some libraries that seem particularly promising to me. One of them is Mox, a simple but powerful library for implementing mocks for predefined behaviours (note the British spelling!).
Tests can benefit a project in many different ways. For example, they help ensure that the software behaves as expected. They also help document that functionality for pieces of code that other developers may have to maintain. Lately, I’ve been using state tables in my tests to improve both of these benefits. State tables allow for […]