Automated testing of Tracker
Tracker has continuous testing that runs in GitLab CI:
Provided by distros
Some distros also run the test suite.
Ubuntu autopkgtest: https://autopkgtest.ubuntu.com/packages/tracker/
Debian reproducible-builds: https://tests.reproducible-builds.org/tracker/
OpenSuSE do automated whole-system testing that includes the GNOME desktop for their Tumbleweed rolling release distro: https://openqa.opensuse.org/group_overview/1
To run yourself
Tracker contains many unit tests and functional tests which you can execute using the meson test command.