char.test.gr

import Char from "char"
import { isChar, isDigit } from "./char"

assert isChar('c') == true

assert Char.code('0') == 48
assert Char.code('9') == 57
assert isDigit('0') == true
assert isDigit('9') == true
assert isDigit('a') == false

assert isDigit(Char.pred('0')) == false
assert isDigit(Char.succ('0')) == true
assert isDigit(Char.succ('9')) == false