echo "deb http://repo.mongodb.org/apt/debian stretch/mongodb-org/3.6 main" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.6.list
apt update
apt install mongodb-org-server=3.6.22 -V
Installing ibus on Debian has a tendency to stop the keyboard working, particularly in KDE system dialogue boxes and search feilds. ibus is not really required, so patching the deb to prevent the install from also installing ibus as a required dependecy solves the problem:
S=$(mktemp -d)
dpkg -x zoom_amd64.deb $S
dpkg -e zoom_amd64.deb $S/DEBIAN
sed -i -E 's/(ibus, |, ibus)//' $S/DEBIAN/control 
dpkg -b $S zoom_amd64-no-ibus.deb 
At a high level, these are the characteristics you should see in a testing strategy.
- There should be formal test planning.
- Each round of testing should have a clear objective or define what is in and out of scope (set out by test plan).
- Each test must explicitly define pre-conditions, execution steps and expected outcomes.
- Tests (regression) should have pre-defined priority levels of test.