test

#!/bin/bash

function run {
    valgrindlog=$(mktemp --tmpdir valgrind.log.XXXXXXXXXX)
    valgrind --quiet --log-file="$valgrindlog" --error-exitcode=124 --leak-check=full --track-fds=yes ./ja2l "$@"
    status=$?
    sed -i '/FILE DESCRIPTORS: 1 open at exit./,+4 d' -- "$valgrindlog" # 1 is expected, the valgrind logfile fd
    cat >&2 -- "$valgrindlog"
    rm -f -- "$valgrindlog"
    if ((status != 0)); then
        exit 1
    fi
}

function assertEquals {
    if [[ "$1" != "$2" ]]; then
        printf >&2 '%s: assertion failure\n' "${3:-(unknown function)}"
        diff >&2 -u --label "expected" --label "actual" <(printf '%s' "$1") <(printf '%s' "$2")
        exit 1
    fi
}

function assertMatches {
    if ! [[ "$2" =~ $1 ]]; then
        printf >&2 '%s: assertion failure\nPattern: %s\nActual:\n%s\n' "${3:-(unknown function)}" "$1" "$2"
        exit 1
    fi
}

function closeExtraFds {
    for fd in /dev/fd/*; do
        fd=${fd#/dev/fd/}
        if ((fd > 2)); then
            exec {fd}<&-
        fi
    done
}

function testSingleLine {
    expected='{}'
    actual=$(printf '[\n{}\n]\n' | run)
    if (($?)); then
        exit 1
    fi
    assertEquals "$expected" "$actual" "${FUNCNAME[0]}"
}

function testMultiLine {
    expected=$'{}\n{}'
    actual=$(printf '[\n{},\n{}\n]\n' | run)
    if (($?)); then
        exit 1
    fi
    assertEquals "$expected" "$actual" "${FUNCNAME[0]}"
}

function testHelp {
    outputShort=$(run -h)
    assertEquals 'exit code 0' "exit code $?" "${FUNCNAME[0]}"
    outputLong=$(run --help)
    assertEquals 'exit code 0' "exit code $?" "${FUNCNAME[0]}"
    assertEquals "$outputShort" "$outputLong"
    assertMatches '^Usage: ' "$outputShort" "${FUNCNAME[0]}"
}

function testVersion {
    outputShort=$(run -v)
    assertEquals 'exit code 0' "exit code $?" "${FUNCNAME[0]}"
    outputLong=$(run --version)
    assertEquals 'exit code 0' "exit code $?" "${FUNCNAME[0]}"
    assertEquals "$outputShort" "$outputLong"
    assertMatches '[[:digit:]]\.[[:digit:]]' "$outputShort" "${FUNCNAME[0]}"
    assertMatches 'AGPL' "$outputShort" "${FUNCNAME[0]}"
}

closeExtraFds
testSingleLine
testMultiLine
testHelp
testVersion