Fake timers / mock Date

[jsardev]

Quick question: can I somehow use testdouble to mock out Date? I mean a similiar functionality to sinon fake timers. I tried few approaches with td but it didn't work out 😢

[rosston]

I can’t speak to precisely why testdouble can’t do what you’re trying to do.

But if you haven’t looked at it before, I might suggest looking at the contributing-tests wiki, specifically “Don’t mock what you don’t own”. That whole page is worth reading for the background (and it’s not very long), but the last section suggests a way forward: putting your use of Date in your own wrapper, which you can then design for easy use/mocking.

[jsardev]

@rosston That makes sense. I always forget about this rule, but it really makes sense 😄 Thanks!