elm/exercises/phone-number/PhoneNumberTests.elm

module Main exposing (..)

import ElmTest exposing (..)
import PhoneNumber exposing (getNumber, prettyPrint)


tests : Test
tests =
  suite
    "PhoneNumber"
    [ test
        "cleans number"
        (assertEqual (Just "1234567890") (getNumber "(123) 456-7890"))
    , test
        "cleans number with dots"
        (assertEqual (Just "1234567890") (getNumber "123.456.7890"))
    , test
        "valid when 11 digits and first is 1"
        (assertEqual (Just "1234567890") (getNumber "11234567890"))
    , test
        "invalid when 11 digits"
        (assertEqual Nothing (getNumber "21234567890"))
    , test
        "invalid when 9 digits"
        (assertEqual Nothing (getNumber "123456789"))
    , test
        "invalid when 12 digits"
        (assertEqual Nothing (getNumber "123456789012"))
    , test
        "invalid when empty"
        (assertEqual Nothing (getNumber ""))
    , test
        "invalid when no digits present"
        (assertEqual Nothing (getNumber " (-) "))
    , test
        "valid with leading characters"
        (assertEqual (Just "1234567890") (getNumber "my number is 123 456 7890"))
    , test
        "valid with trailing characters"
        (assertEqual (Just "1234567890") (getNumber "123 456 7890 - bob"))
    , test
        "pretty print"
        (assertEqual (Just "(123) 456-7890") (prettyPrint "1234567890"))
    , test
        "pretty print with full us phone number"
        (assertEqual (Just "(123) 456-7890") (prettyPrint "11234567890"))
    ]


main : Program Never
main =
  runSuite tests