Halo2,
To encourage you more to start doing test - or at least learn how to write it - we create a giant dashboard (again, if you remember devops did something similar in the past) encapsulating our current test code coverage. Please check out https://jacoco-report.test.tvlk.cloud/backend-traveloka-product-develop .
Please read https://29022131.atlassian.net/wiki/spaces/BEI/pages/206022585/How+to+Use+develop+Test+Coverage+Dashboard to understand how to read it. As a bonus you'll find a way to enable test on code review! No need to create extra pipeline for that and it will be fast because we test your code partially.
Given our code base scale, right now we only support smallTest. We aware some of you already implemented mediumTest, you can discuss with us your need and we'll find a way to accomodate it.
All in all, we beg feedback from you, to make our test culture better and overall make our workspace a better place. Last but not least, stop writing legacy code.