An open source Objective-C testing framework from the developers at Skyscanner for altering object behaviours. Dixie provides a set of tools which developers can use to test their code, centred around the idea of creating chaos to test the worst case scenario. Examples of this could include: hijacking your app's localisation to simulate long strings or other unexpected text; inject mocked network responses so you don’t have to rely on real network communication; or injecting randomised properties to your data models to test your app's robustness.