What’s New in Testing

WWDC 2018

Code Coverage

Target Selection

XCCOV (Command line tool)

Coverage Data

Source Editor

Test Options (new) 👍

Parallel Distributed Testing

Classes Execute in Parallel

• Hidden dependencies between tests in a class
• Avoid unnecessary +setUp and +tearDown computation

Parallel Testing on Simulator

• Original simulator is not used during testing
• Separate data containers

xcodebuild

• -parallel-testing-worker-count n
  //worker numbers
• -parallel-testing-enabled YES | NO
  // Testing on / off

Tips and Tricks

• Consider splitting a long running class into two classes
• Put performace tests into their own bundle, with parallelization disabled
• Understand which tests are not safe for parallelization