Improve test coverage and integration tests
Child issues (updated 2020-12-16):
- #27361 (closed)
- #28774 (moved)
- #29358 (closed)
- #29727 (closed)
- #30902 (closed)
- #33166 (moved)
- #33167 (closed)
Integration tests with chutney (NL O2.1):
Coverage (NL O2.2):
Unit tests (NL O2.2):
Edited by Gaba