Increase test coverage #22
Description
The code coverage is ~66% at the moment. This could be a lot higher.
The crate implements relatively primitive types, so good tests don't have to be very complex I think. Even "dumb" tests like assert_eq!(plane, plane.clone()) are basically free to implement, so why not.
Some things that are missing tests:
- (de)serialization in general
Frame<T>- some of the math fns