Tests - should improve readability

[tobixen]

The test code covers lots of use-case scenarios, and it's no point to duplicate all of it into the examples folder. However, the current test code is not optimized for readability. This should be improved upon.

(Partly overlaps with #99)

[tobixen]

I'm reconsidering - tests are tests, documentation is documentation. I should probably try to figure out ways to improve readability in the test code, but they cannot make good documentation obsolete. Closing this as for now, "not planned" for the immediate future.