So have you just created a nice shiny class implementing SingletonPattern and now you’ve got to test it? You may find to your horror that the singleton is messing up the tests!

Unreal Engine 4 went free on March 2, 2015, and both the engine and its source code were made available to the public, although the instructions provided by Unreal Engine website and Unreal Engine’s GitHub repository page are clear enough; this guide aims to brings them all together in one place.