Fix CI

[davidruegamer]

Currently an old setup for Travis CI is used and hence automatic checks are broken.

[m-muecke]

Currently an old setup for Travis CI is used and hence automatic checks are broken.

You open for using GitHub Actions? Then I could provide a PR.

[davidruegamer]

Yes and thank you! That would be awesome!

[m-muecke]

Yes and thank you! That would be awesome!

Ok, great! You open for using testthat for testing? It's currently already in suggest, but afaik not really used.

[davidruegamer]

IIRC, we didn't use testthat because our tests take a long time. I would have to think about how to simplify them to avoid long CI waiting times.

[m-muecke]

IIRC, we didn't use testthat because our tests take a long time. I would have to think about how to simplify them to avoid long CI waiting times.

What I generally do, when the tests are running too long for the CI is to add a skip call, e.g. skip_on_ci() and skip_on_cran()

[davidruegamer]

Good idea. Another option would be to skip all the factorization tests from @Almond-S and let the boosting routines in general_tests only run for one iteration via control = boost_control(mstop = 1). Since we do not do any type checking in this file, I guess we could go with tests that simply check for no error