Options

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Lab

This is the original contents of the lab file (../labs/05-options/05-options.lab.sh).

Follow the instructions in the file to solve the lab.

sobash_assert_parsed_options_are_valid() {

  # update the placeholder args on the next line so that
  # the case statement does NOT return 2.
  set -- "argOne" "argTwo" "argThree" "argFour" 

  if [[ "$#" == "0" ]]; then
    echo -e "\n[FAIL] ${FUNCNAME[0]} | No options passed."
    return 3
  fi

  until [[ "$#" -lt "1" ]]; do
    case "${1,,}" in
      -i|--info)
        echo -e "\n[INFO] ${FUNCNAME[0]} | User passed -i."
    shift 1
    ;;
      -w|--warn)
        echo -e "\n[WARN] ${FUNCNAME[0]} | User passed -w flag with option ($2)."
    shift 2
    ;;
      *)
    echo -e "\n[FAIL] ${FUNCNAME[0]} | User passed invalid flag ($1)." 1>&2
        return 2
    ;;
    esac
  done

}

Test

This is the original contents of the test file (../labs/05-options/05-options.test.sh).

Review the test cases and your lab file.

Will the lab file (../labs/05-options/05-options.lab.sh) pass all test cases?

#!/usr/bin/env bash

test_assert_parsed_options_are_valid() {

   ../build/sobash assert-parsed-options-are-valid
   assertEquals 0 $?

}

source ./shunit2

When ready, run the following to execute the tests above against the lab file:

cd "${HOME}/bash-programming/src/" \ 
  && ./test.sh lab 05-options

Solution

This is the original contents of the solution file (../labs/05-options/05-options.solution.sh).

This file contains an example of a viable solution that passes all the test cases.

sobash_assert_parsed_options_are_valid() {

  set -- "-i" "-w" "warnArg" "--warn" "anotherWarnArg"

  if [[ "$#" == "0" ]]; then
    echo -e "\n[FAIL] ${FUNCNAME[0]} | No options passed."
    return 3
  fi

  until [[ "$#" -lt "1" ]]; do
    case "${1,,}" in
      -i|--info)
        echo -e "\n[INFO] ${FUNCNAME[0]} | User passed -i."
    shift 1
    ;;
      -w|--warn)
        echo -e "\n[WARN] ${FUNCNAME[0]} | User passed -w flag with option ($2)."
    shift 2
    ;;
      *)
    echo -e "\n[FAIL] ${FUNCNAME[0]} | User passed invalid flag ($1)." 1>&2
        return 2
    ;;
    esac
  done

}

Run the following to execute the tests above against the solution file:

cd "${HOME}/bash-programming/src/" \ 
  && ./test.sh solution 05-options

Feel free to run the following to override the contents of the lab file with the solution file.

cd "${HOME}/bash-programming/labs/" \ 
  && cp ./05-options/05-options.{solution,lab}.sh