Unit Testing bash scripts

Question

We have a system that has some bash scripts running besides Java code. Since we are trying to Test Everything That Could Possibly Break, and those bash scripts may break, we

Answer 1

Why do you say that it's "hard" to test bash scripts?

What's wrong with test wrappers like:

 #!/bin/bash
 set -e
 errors=0
 results=$($script_under_test $args<&1
     let errors+=1
     }

 echo "$results" | grep -q $expected1 || {
      echo "Test Failed.  Expected $expected1"
      let errors+=1
 }
 # and so on, et cetera, ad infinitum, ad nauseum
 [ "$errors" -gt 0 ] && {
      echo "There were $errors errors found"
      exit 1
 }