Coming from the 1980s where many apps were written by a single person with no source control and the only test performed was "does it compile?" to the point where you need ML just to figure out what the hell you need to test completely blows my mind.<p>Also, it makes me cry.
Similar post from FB from 2018 - <a href="https://engineering.fb.com/2018/11/21/developer-tools/predictive-test-selection/" rel="nofollow">https://engineering.fb.com/2018/11/21/developer-tools/predic...</a>, and a more recent one (though just the raw technical paper) from 2020 - <a href="https://research.fb.com/wp-content/uploads/2020/12/Predictive-Test-Selection.pdf" rel="nofollow">https://research.fb.com/wp-content/uploads/2020/12/Predictiv...</a>.