$ sudo apt-get update
$ sudo apt-get install libfest-assert-java 

libfest-assert-java is installed in your system.

Make ensure the libfest-assert-java package were installed using the commands given below,

$ sudo dpkg-query -l | grep libfest-assert-java *

You will get with libfest-assert-java package name, version, architecture and description in a table

libfest-assert-java package basic information: