DoorDash Used Copilot to Convert Its XCTest-Based iOS Test Suite to Swift Testing
DoorDash didn't just use Copilot. They automated a massive iOS test migration—proving AI coding tools work at scale, not just in demos.
Why it matters
This is a rare public case study showing GitHub Copilot delivering measurable business value in a complex, real-world refactoring task. For engineering leaders, it's a blueprint for AI-assisted developer productivity at enterprise scale.
The key facts
9 to knowDoorDash migrated entire XCTest-based iOS test suite to Swift Testing
Used GitHub Copilot with reliability safeguards to execute migration
Achieved measurable performance gains from modernization
Large-scale test suite refactoring completed quickly and safely
Engineer attribution: Matheus Gois, DoorDash
DoorDash migrated entire iOS XCTest suite to Swift Testing using GitHub Copilot
Migration included 'strong reliability safeguards' and measurable performance gains
Large-scale test suite modernization completed with AI assistance
Engineer: Matheus Gois (DoorDash)
Go to the source
InfoQ AI/MLinfoq.com
Publisher excerpt: Using Copilot along with strong reliability safeguards, DoorDash migrated their iOS XCTest-based test suite to Swift Testing, thus modernizing a large test suite quickly, safely, and with measurable performance gains, says DoorDash engineer Matheus Gois. By Sergio De Simone