check_standards

#!/usr/bin/env bash

# This script exists to save and exhibit the results of several
# command line programs with proper and improper arguments.
#
# The purpose of these tests is to see how well-known commands
# handle ambiguous situations so I can respond in familiar ways
# to similar inputs.
#
# If new experiences suggest new pitfalls, it should be easy to
# add new tests to confirm the responses of well-known programs.

# enum colors: { black=0, red, green, brown, blue, magenta, cyan, white }

colargs=""      # cyan
colerr=""       # bold red
colerr2=""        # normal red
colsuccess=""   # green
colannounce=""  # blue
coloff=""

announce_test()
{
    echo -n ""
    echo
    echo "${colannounce}${1}"
}

intertest_pause()
{
    local dummy
    echo
    read -n1 -pPress\ ENTER\ for\ the\ next\ test. dummy
}

run_test()
{
    local -a args=( "$@" )
    echo "Running test with ${colargs}${args[0]}${coloff}. (${#args[@]})"
    echo "${colargs}${args[@]}${coloff}"
    echo
    "${args[@]}" 2> >(while read line; do echo -e "${colerr}stderr:${colerr2} $line${coloff}" >&2; done)
    if [ "$?" -eq 0 ]; then
        echo "${colsuccess}Program \"${args[0]}\" ran successfully."
    else
        echo "${colerr}Program \"${args[0]}\" returned an error."
    fi
}

announce_test "Run test, expecting no errors."
run_test tar --exclude=.git --exclude=*.tar -cvf a.tar .
intertest_pause

announce_test "Test passing a non-number to a number option."
run_test less -bten "$0"
intertest_pause

announce_test "Run test, expecting error for passing a string value to a number option."
run_test tar --exclude=.git --exclude=*.tar --level=ten -cvf a.tar .
intertest_pause

announce_test "Run test, see what happens with unknown option, B."
run_test tar --exclude=.git --exclude=*.tar -Bcvf a.tar .
intertest_pause

announce_test "Run test, see what happens with argument-taking option, f, followed by other characters."
run_test tar --exclude=.git --exclude=*.tar -fcv a.tar .

announce_test "Running grep as an example of exception to --long_option=value rule (grep also accepts --long_option value)."
run_test grep --file=bogus
run_test grep --file bogus