Objective-C Singleton Pattern Updated For Testability

Objective-C Singleton Pattern Updated For Testability

Posted by on Jan 24, 2013 in BDD, iOS, iPad, iPhone, Mac OS X, Software Development, TDD | 10 Comments

At Two Bit Labs we do a fair amount of unit testing. In places where we use singletons we use a variation on the the Objective-C dispatch_once pattern of thread safe singleton creation. This variation supports resetting the singleton or replacing it with a mock object. That way in our unit tests we can do […]

Kickstart your apps with the iOS Xcode Starter Project

Kickstart your apps with the iOS Xcode Starter Project

We created the iOS Xcode Starter Project to make it quick and easy to start a new iPhone or iPad app. Our goal was to create a template to save the hours of effort it takes on a new project configuring essential open source libraries, the unit and functional testing environments, analytics, multiple targets, multiple […]

Behavior Driven Development what?

Like many, I was fuzzy on BDD or Behavior Driven Development until I started working with BDD tools like Cucumber, JBehave, and Jasmine. However, BDD isn’t a tool. It’s a design approach you can use with your existing testing tools or by adding in additional tools. BDD refers to one way of doing TDD or […]

Mocking singletons with OCMock

Posted by on Feb 28, 2011 in code | 20 Comments

Although Graham Lee might not approve, I occasionally use the singleton pattern, particularly for managing access to my data models. Singletons in Cocoa are accessed using the following convention: static UserModelManager *sharedManager = nil; +(UserModelManager *)sharedManager {     if (sharedManager == nil) {         sharedManager = [[super allocWithZone:NULL] init];     […]