How we found a race condition in the AOSP with the Android emulator that affected the amount of heap space available to apps. Rainforest supports testing native mobile applications on Android using the official android emulator from Google. Using emulators instead of real physical devices provides a bunch of benefits such as being able to […]
The engineering team of RainforestQA (YC S12) is remote and distributed around the globe, with developers in America, Europe, and Asia. We’re using PagerDuty to assign developers on-call and for contacting/escalating people in case of incidents. Our working hours cover almost all time-zones, about 22 hours from full time-zone coverage. Yet for distributing our on-call […]
A deep dive into what the TCC database contains and the meaning of the various fields present in it. What is TCC? TCC (Transparency, Consent, and Control) is a mechanism in macOS to limit and control application access to certain features, usually from a privacy perspective. This can include things such as location services, contacts, […]
This article is going to look at different libraries providing finite state machine abstractions that can be used in React applications. I have used state machines on the backend in the past but I have never used one in a React application. I’m also going to share why I believe our codebase could benefit from […]
A sustainable Rails upgrade workflow that slowly but surely brought us to the point when all our apps run on latest Rails. Rainforest main application is a Rails monolith with 160k lines of code and tests. Bumping a major version of rails in a project this big has overwhelming results, in fact no rails command […]
In our last post, we explored the pros and cons of Recompose and why we decided to remove it from our codebase. This post includes the strategy we used to approach the large task of implementing that refactor.
We recently made the decision to remove Recompose entirely – which was a large endeavor. It touched over 200 files, and in some places was deeply coupled to core functionality of our app.This post covers why we decided to replace Recompose.
Kaggle is a platform for data science competitions. I’ve spent about 3 months of my life competing on Kaggle, and that’s a lot of time! It’s about 1% of the working part of my life (in the best case scenario, without any meteorites or nuclear wars). So I need to justify this with some positive, practical […]
Big refactors are horrible. They are hard to estimate because they often contain unknown work. They are hard to review because there’s a lot of code. They often have unforeseen side effects and cause way too many merge conflicts because they touch so many different parts of your codebase. TLDR: Good test coverage can bring you […]
Rainforest is built on open source and we’ve been doing our best to contribute back to it. I extracted Http::Exceptions from the main Rainforest application, since it’s a pain that we spent a lot of time dealing with and we figured it could be useful for the broader community. Click here to check it out on GitHub. Sometimes small things can end up […]