/usr/lib/libsmokeqttest.so.3 is in libsmokeqttest4-3 4:4.14.3-1.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libsmokeqttest.so.3.0.0
/usr/lib/libsmokeqttest.so.3.0.0