#!/bin/bash

# source the library function
if [[ -z $1 || ! -f $1 ]]; then
  printf "error: path to human_to_size library not provided or does not exist\n"
  exit 1
fi
. "$1"

if ! type -t human_to_size >/dev/null; then
  printf 'human_to_size function not found\n'
  exit 1
fi

parse_hts() {
  local input=$1 expected=$2 result

  (( ++testcount ))

  result=$(human_to_size "$1")
  if [[ $result = "$expected" ]]; then
    (( ++pass ))
  else
    (( ++fail ))
    printf '[TEST %3s]: FAIL\n' "$testcount"
    printf '      input: %s\n' "$input"
    printf '     output: %s\n' "$result"
    printf '   expected: %s\n' "$expected"
  fi
}

summarize() {
  if (( !fail )); then
    printf 'All %s tests successful\n\n' "$testcount"
    exit 0
  else
    printf '%s of %s tests failed\n\n' "$fail" "$testcount"
    exit 1
  fi
}
trap 'summarize' EXIT

printf 'Beginning human_to_size tests\n'

# parse_hts <input> <expected output>

parse_hts '1MiB' 1048576

parse_hts '10XiB' ''

parse_hts '10 MiB' 10485760

parse_hts '10 XiB' ''

parse_hts '.1 TiB' 109951162778

parse_hts '  -3    KiB   ' -3072

parse_hts 'foo3KiB' ''

parse_hts '3KiBfoo' ''

parse_hts '3kib' ''

parse_hts '+1KiB' 1024

parse_hts '+1.0 KiB' 1024

parse_hts '1MB' 1000000

parse_hts '1M' 1048576

parse_hts ' 1 G ' 1073741824

parse_hts '1Q' ''