Unit testing with ServiceLocator

Question

I am doing a unit test on a class that uses the unity dependency injection framework.

This returns null: ServiceLocator.Current.GetInstance();

How can I get it to return a mock object or just the object itself?

Answer 1

You could make use of Poor Man's injection. Create a default constructor which retrieves the dependencies from the service locator, and forward those dependencies to a "real" constructor which takes them as parameters. That takes care of production situations.

Then when testing the class in question, pass in a fake/mock version of the dependencies to the "real" constructor, bypassing the default one altogether.