add missing unit tests for all backends
This issue collects all the tings that do not have unit tests yet
-
video: add unit tests and testdata for one codec -
video: add more testdata and expand the unit-tests -
core::train_properties: Write tests for the class -
core::track_data: check if the correct format was used for the data -
core::Track: write tests for the class -
physics: test if it behaves properly