Adds test support without cocoapods

[pmairoldi]

Addresses #414

Like #422 this does not use cocoapods as to not create an xcworkspace. For now this uses XCTest but could be moved to Quick and Nimble if everyone likes it better.

[danielgindi]

Looks good!
I think we should add tests for the beziers too, and add edge cases (viewport encloses beginning/end of a large dataset, instead of being fully zoomed out)
But this is a good start!

[pmairoldi]

For sure. I was just putting the infrastructure in place.

[danielgindi]

Can't auto-merge, I think it clashes with the tvOS project changes

[pmairoldi]

Alright. I'll rebase and make things work.

[pmairoldi]

That should fix it

[danielgindi]

Compiles fine and runs just fine :-)

[yas375]

@petester42 thanks! 👍 🚀

[danielgindi]

How do we re-generate those images?

While adding rotation support to labels, I have removed some "predefined" values that were there to adjust drawing quirks. Now we control the drawing more accurately and do not need those. But things have changed on a pixel level and all tests fail :(

[pmairoldi]

In setup add record = true. An example can be seen here. It's in objective-c but it's the same thing.

[pmairoldi]

Possibly all test can have it written but set to no just to make it easier to understand.

[danielgindi]

Thanks :-)