Revamping the Android testing pipeline at Dropbox

This post details the revamp of Dropbox's Android testing pipeline, reducing CI runtime from 75 minutes to 25 minutes. Key contributions include: implementing an Affected Module Detector to run only tests relevant to code changes, migrating from custom tooling to industry-standard tools like Gradle and Firebase Test Lab, and rearchitecting CI jobs for better parallelism. The team learned from the AndroidX team's open-source implementation of an Affected Module Detector to solve the problem of selectively scaling the pipeline based on module dependencies.