How do I mock Time for system tests?

[ostwilkens]

I need to ensure the results of my systems are framerate-independent.
To do this, I'm thinking I need to be able to update Time with an Instant of my choosing.
There is a function for Time named update_with_instant, but it's only public to the bevy crate.

[ManevilleF]

You can use custom time steps

[ostwilkens]

Thank you for the tip, I didn't know this was a built-in feature!
However, I want the systems to run every frame, and the framerate can vary.
I am using time delta, and I think the system is framerate-independent, but I need to confirm it.

If update_with_instant was public, I would have everything I need. But I'm guessing it's a conscious decision to have it private.

[alice-i-cecile]

For future readers, #2549 (by the same author) exposes the relevant functionality to the world. I think this is the right direction to go; let's see how that PR process works out.