{-# LANGUAGE OverloadedStrings #-}

{-|
Description:    Emulating tests from @encoding/big5-encoder.html@

Copyright:      (c) 2020 Samuel May
License:        MPL-2.0
Maintainer:     ag.eitilt@gmail.com

Stability:      experimental
Portability:    portable
-}
module Test.Willow.WebPlatformTests.Manual.Encoding.Big5
    ( tests
    ) where


import qualified Data.ByteString as BS
import qualified Data.Text as T

import qualified Test.HUnit as U

import Test.HUnit ( (~:), (~?=) )

import Web.Willow.Common.Encoding

import Test.Willow.WebPlatformTests.Manual.Common


tests :: U.Test
tests = "big5-encoder.html" ~: U.TestList $ map testGroup testData
  where testGroup (n, ts) = n ~: U.TestList $ map test ts
        test t = nameE t ~: encodeEnc' Big5 (wrapText $ inputE t) ~?= (wrapBytes $ outputE t)
        wrapText s = T.snoc (T.cons 'X' s) 'X'
        wrapBytes bs = BS.snoc (BS.cons 0x58 bs) 0x58


testData :: [(String, [InlineEncode])]
testData =
    [ ("sanity",
        [ InlineEncode
            { inputE = "ab"
            , outputE = "ab"
            , nameE = "very basic"
            }
        ]
    ), ("edge cases",
        [ InlineEncode
            { inputE = "\x9EA6"
            , outputE = "\x26\x23\&40614\x3B"
            , nameE = "Highest-pointer BMP character excluded from encoder"
            }
        , InlineEncode
            { inputE = "\x2626B"
            , outputE = "\x26\x23\&156267\x3B"
            , nameE = "Highest-pointer character excluded from encoder"
            }
        , InlineEncode
            { inputE = "\x3000"
            , outputE = "\xA1@"
            , nameE = "Lowest-pointer character included in encoder"
            }
        , InlineEncode
            { inputE = "\x20AC"
            , outputE = "\xA3\xE1"
            , nameE = "Euro; the highest-pointer character before a range of 30 unmapped pointers"
            }
        , InlineEncode
            { inputE = "\x4E00"
            , outputE = "\xA4@"
            , nameE = "The lowest-pointer character after the range of 30 unmapped pointers"
            }
        , InlineEncode
            { inputE = "\x27607"
            , outputE = "\xC8\xA4"
            , nameE = "The highest-pointer character before a range of 41 unmapped pointers"
            }
        , InlineEncode
            { inputE = "\xFFE2"
            , outputE = "\xC8\xCD"
            , nameE = "The lowest-pointer character after the range of 41 unmapped pointers"
            }
        , InlineEncode
            { inputE = "\x79D4"
            , outputE = "\xFE\xFE"
            , nameE = "The last character in the index"
            }
        ]
    ), ("not in index",
        [ InlineEncode
            { inputE = "\x2603"
            , outputE = "\x26\x23\&9731\x3B"
            , nameE = "The canonical BMP test character that is not in the index"
            }
        , InlineEncode
            { inputE = "\x1F4A9"
            , outputE = "\x26\x23\&128169\x3B"
            , nameE = "The canonical astral test character that is not in the index"
            }
        ]
    ), ("duplicate low bits",
        [ InlineEncode
            { inputE = "\x203B5"
            , outputE = "\xFD\&j"
            , nameE = "A Plane 2 character whose low 16 bits match a BMP character that has a lower pointer"
            }
        ]
    ), ("prefer last",
        [ InlineEncode
            { inputE = "\x2550"
            , outputE = "\xF9\xF9"
            , nameE = "A duplicate-mapped code point that prefers the highest pointer in the encoder"
            }
        ]
    )]