What's a good way to overwrite DateTime.Now during testing?

Question

I\'ve got some (C#) code that relies on today\'s date to correctly calculate things in the future. If I use today\'s date in the testing, I have to repeat the calculation in

Answer 1

Simple answer: ditch System.DateTime :) Instead, use NodaTime and it's testing library: NodaTime.Testing.

Further reading:

• Unit testing with Noda Time
• Dependency Injection: Inject Your Dependencies, Period!