megaparsec-4.2.0: tests/Char.hs
-- -*- Mode: Haskell; -*-
--
-- QuickCheck tests for Megaparsec's character parsers.
--
-- Copyright © 2015 Megaparsec contributors
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
-- * Redistributions of source code must retain the above copyright notice,
-- this list of conditions and the following disclaimer.
--
-- * Redistributions in binary form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS “AS IS” AND ANY
-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
-- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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{-# OPTIONS -fno-warn-orphans #-}
module Char (tests) where
import Data.Char
import Data.List (findIndex, isPrefixOf)
import Test.Framework
import Test.Framework.Providers.QuickCheck2 (testProperty)
import Test.QuickCheck
import Text.Megaparsec.Char
import Util
#if !MIN_VERSION_base(4,8,0)
import Control.Applicative ((<$>))
#endif
tests :: Test
tests = testGroup "Character parsers"
[ testProperty "newline" prop_newline
, testProperty "crlf" prop_crlf
, testProperty "eol" prop_eol
, testProperty "tab" prop_tab
, testProperty "space" prop_space
, testProperty "controlChar" prop_controlChar
, testProperty "spaceChar" prop_spaceChar
, testProperty "upperChar" prop_upperChar
, testProperty "lowerChar" prop_lowerChar
, testProperty "letterChar" prop_letterChar
, testProperty "alphaNumChar" prop_alphaNumChar
, testProperty "printChar" prop_printChar
, testProperty "digitChar" prop_digitChar
, testProperty "hexDigitChar" prop_hexDigitChar
, testProperty "octDigitChar" prop_octDigitChar
, testProperty "markChar" prop_markChar
, testProperty "numberChar" prop_numberChar
, testProperty "punctuationChar" prop_punctuationChar
, testProperty "symbolChar" prop_symbolChar
, testProperty "separatorChar" prop_separatorChar
, testProperty "asciiChar" prop_asciiChar
, testProperty "latin1Char" prop_latin1Char
, testProperty "charCategory" prop_charCategory
, testProperty "char" prop_char
, testProperty "char'" prop_char'
, testProperty "anyChar" prop_anyChar
, testProperty "oneOf" prop_oneOf
, testProperty "oneOf'" prop_oneOf'
, testProperty "noneOf" prop_noneOf
, testProperty "noneOf'" prop_noneOf'
, testProperty "string" prop_string
, testProperty "string'" prop_string'_0
, testProperty "string' (case)" prop_string'_1 ]
instance Arbitrary GeneralCategory where
arbitrary = elements
[ UppercaseLetter
, LowercaseLetter
, TitlecaseLetter
, ModifierLetter
, OtherLetter
, NonSpacingMark
, SpacingCombiningMark
, EnclosingMark
, DecimalNumber
, LetterNumber
, OtherNumber
, ConnectorPunctuation
, DashPunctuation
, OpenPunctuation
, ClosePunctuation
, InitialQuote
, FinalQuote
, OtherPunctuation
, MathSymbol
, CurrencySymbol
, ModifierSymbol
, OtherSymbol
, Space
, LineSeparator
, ParagraphSeparator
, Control
, Format
, Surrogate
, PrivateUse
, NotAssigned ]
prop_newline :: String -> Property
prop_newline = checkChar newline (== '\n') (Just "newline")
prop_crlf :: String -> Property
prop_crlf = checkString crlf "\r\n" (==) "crlf newline"
prop_eol :: String -> Property
prop_eol s = checkParser eol r s
where h = head s
r | s == "\n" = Right "\n"
| s == "\r\n" = Right "\r\n"
| null s = posErr 0 s [uneEof, exSpec "end of line"]
| h == '\n' = posErr 1 s [uneCh (s !! 1), exEof]
| h /= '\r' = posErr 0 s [uneCh h, exSpec "end of line"]
| "\r\n" `isPrefixOf` s = posErr 2 s [uneCh (s !! 2), exEof]
| otherwise = posErr 0 s [ uneStr (take 2 s)
, uneCh '\r'
, exSpec "crlf newline"
, exSpec "newline" ]
prop_tab :: String -> Property
prop_tab = checkChar tab (== '\t') (Just "tab")
prop_space :: String -> Property
prop_space s = checkParser space r s
where r = case findIndex (not . isSpace) s of
Just x ->
let ch = s !! x
in posErr x s
[ uneCh ch
, uneCh ch
, exSpec "white space"
, exEof ]
Nothing -> Right ()
prop_controlChar :: String -> Property
prop_controlChar = checkChar controlChar isControl (Just "control character")
prop_spaceChar :: String -> Property
prop_spaceChar = checkChar spaceChar isSpace (Just "white space")
prop_upperChar :: String -> Property
prop_upperChar = checkChar upperChar isUpper (Just "uppercase letter")
prop_lowerChar :: String -> Property
prop_lowerChar = checkChar lowerChar isLower (Just "lowercase letter")
prop_letterChar :: String -> Property
prop_letterChar = checkChar letterChar isAlpha (Just "letter")
prop_alphaNumChar :: String -> Property
prop_alphaNumChar =
checkChar alphaNumChar isAlphaNum (Just "alphanumeric character")
prop_printChar :: String -> Property
prop_printChar = checkChar printChar isPrint (Just "printable character")
prop_digitChar :: String -> Property
prop_digitChar = checkChar digitChar isDigit (Just "digit")
prop_octDigitChar :: String -> Property
prop_octDigitChar = checkChar octDigitChar isOctDigit (Just "octal digit")
prop_hexDigitChar :: String -> Property
prop_hexDigitChar = checkChar hexDigitChar isHexDigit (Just "hexadecimal digit")
prop_markChar :: String -> Property
prop_markChar = checkChar markChar isMark (Just "mark character")
prop_numberChar :: String -> Property
prop_numberChar = checkChar numberChar isNumber (Just "numeric character")
prop_punctuationChar :: String -> Property
prop_punctuationChar =
checkChar punctuationChar isPunctuation (Just "punctuation")
prop_symbolChar :: String -> Property
prop_symbolChar = checkChar symbolChar isSymbol (Just "symbol")
prop_separatorChar :: String -> Property
prop_separatorChar = checkChar separatorChar isSeparator (Just "separator")
prop_asciiChar :: String -> Property
prop_asciiChar = checkChar asciiChar isAscii (Just "ASCII character")
prop_latin1Char :: String -> Property
prop_latin1Char = checkChar latin1Char isLatin1 (Just "Latin-1 character")
prop_charCategory :: GeneralCategory -> String -> Property
prop_charCategory cat = checkChar (charCategory cat) p (Just $ categoryName cat)
where p c = generalCategory c == cat
prop_char :: Char -> String -> Property
prop_char c = checkChar (char c) (== c) (Just $ showToken c)
prop_char' :: Char -> String -> Property
prop_char' c s = checkParser (char' c) r s
where h = head s
l | isLower c = [c, toUpper c]
| isUpper c = [c, toLower c]
| otherwise = [c]
r | null s = posErr 0 s $ uneEof : (exCh <$> l)
| length s == 1 && (h `elemi` l) = Right h
| h `notElemi` l = posErr 0 s $ uneCh h : (exCh <$> l)
| otherwise = posErr 1 s [uneCh (s !! 1), exEof]
prop_anyChar :: String -> Property
prop_anyChar = checkChar anyChar (const True) (Just "character")
prop_oneOf :: String -> String -> Property
prop_oneOf a = checkChar (oneOf a) (`elem` a) Nothing
prop_oneOf' :: String -> String -> Property
prop_oneOf' a = checkChar (oneOf' a) (`elemi` a) Nothing
prop_noneOf :: String -> String -> Property
prop_noneOf a = checkChar (noneOf a) (`notElem` a) Nothing
prop_noneOf' :: String -> String -> Property
prop_noneOf' a = checkChar (noneOf' a) (`notElemi` a) Nothing
prop_string :: String -> String -> Property
prop_string a = checkString (string a) a (==) (showToken a)
prop_string'_0 :: String -> String -> Property
prop_string'_0 a = checkString (string' a) a casei (showToken a)
-- | Randomly change the case in the given string.
fuzzyCase :: String -> Gen String
fuzzyCase s = zipWith f s <$> vector (length s)
where f k True = if isLower k then toUpper k else toLower k
f k False = k
prop_string'_1 :: String -> Property
prop_string'_1 a = forAll (fuzzyCase a) $ \s ->
checkString (string' a) a casei (showToken a) s
-- | Case-insensitive equality test for characters.
casei :: Char -> Char -> Bool
casei x y = toLower x == toLower y
-- | Case-insensitive 'elem'.
elemi :: Char -> String -> Bool
elemi c = any (casei c)
-- | Case-insensitive 'notElem'.
notElemi :: Char -> String -> Bool
notElemi c = not . elemi c