Make some test on shell scripts is possible. You will find some examples in this project.
First, get shunit2 cloning repository:
git clone https://github.com/kward/shunit2
shunit2 should be at the root of this project (like examples folder).
Go to examples/bash folder and run one scripts, for examples: ./sed_test.sh
Test script should start with shebang corresponding to the shell to test.
If you want to test bash, uses:
#! /bin/bash