mirror of
https://github.com/mrkkrp/megaparsec.git
synced 2024-12-25 09:12:29 +03:00
704f84f018
Covered the rest of public functions: * ‘space’ * ‘symbol’ * ‘symbol'’ * ‘indentGuard’ * ‘skipLineComment’ * ‘skipBlockComment’
235 lines
8.8 KiB
Haskell
235 lines
8.8 KiB
Haskell
-- -*- Mode: Haskell; -*-
|
|
--
|
|
-- QuickCheck tests for Megaparsec's lexer.
|
|
--
|
|
-- 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,
|
|
-- strict liability, or tort (including negligence or otherwise) arising in
|
|
-- any way out of the use of this software, even if advised of the
|
|
-- possibility of such damage.
|
|
|
|
module Lexer (tests) where
|
|
|
|
import Control.Applicative (empty)
|
|
import Control.Monad (void)
|
|
import Data.Char
|
|
( readLitChar
|
|
, showLitChar
|
|
, isDigit
|
|
, isAlphaNum
|
|
, isSpace
|
|
, toLower )
|
|
import Data.List (findIndices, isInfixOf)
|
|
import Data.Maybe (listToMaybe, maybeToList, isNothing, fromJust)
|
|
import Numeric (showInt, showHex, showOct, showSigned)
|
|
|
|
import Test.Framework
|
|
import Test.Framework.Providers.QuickCheck2 (testProperty)
|
|
import Test.QuickCheck
|
|
|
|
import Text.Megaparsec.Error
|
|
import Text.Megaparsec.Lexer
|
|
import Text.Megaparsec.Pos
|
|
import Text.Megaparsec.Prim
|
|
import Text.Megaparsec.String
|
|
import qualified Text.Megaparsec.Char as C
|
|
|
|
import Util
|
|
|
|
tests :: Test
|
|
tests = testGroup "Lexer"
|
|
[ testProperty "space combinator" prop_space
|
|
, testProperty "symbol combinator" prop_symbol
|
|
, testProperty "symbol' combinator" prop_symbol'
|
|
, testProperty "indentGuard combinator" prop_indentGuard
|
|
, testProperty "charLiteral" prop_charLiteral
|
|
, testProperty "integer" prop_integer
|
|
, testProperty "decimal" prop_decimal
|
|
, testProperty "hexadecimal" prop_hexadecimal
|
|
, testProperty "octal" prop_octal
|
|
, testProperty "float 0" prop_float_0
|
|
, testProperty "float 1" prop_float_1
|
|
, testProperty "number" prop_number
|
|
, testProperty "signed" prop_signed ]
|
|
|
|
newtype WhiteSpace = WhiteSpace
|
|
{ getWhiteSpace :: String }
|
|
deriving (Show, Eq)
|
|
|
|
instance Arbitrary WhiteSpace where
|
|
arbitrary = WhiteSpace . concat <$> listOf whiteUnit
|
|
|
|
newtype Symbol = Symbol
|
|
{ getSymbol :: String }
|
|
deriving (Show, Eq)
|
|
|
|
instance Arbitrary Symbol where
|
|
arbitrary = Symbol <$> ((++) <$> symbolName <*> whiteChars)
|
|
|
|
whiteUnit :: Gen String
|
|
whiteUnit = oneof [whiteChars, whiteLine, whiteBlock]
|
|
|
|
whiteChars :: Gen String
|
|
whiteChars = listOf $ elements "\t\n "
|
|
|
|
whiteLine :: Gen String
|
|
whiteLine = commentOut <$> arbitrary `suchThat` goodEnough
|
|
where commentOut x = "//" ++ x ++ "\n"
|
|
goodEnough x = '\n' `notElem` x
|
|
|
|
whiteBlock :: Gen String
|
|
whiteBlock = commentOut <$> arbitrary `suchThat` goodEnough
|
|
where commentOut x = "/*" ++ x ++ "*/"
|
|
goodEnough x = not $ "*/" `isInfixOf` x
|
|
|
|
symbolName :: Gen String
|
|
symbolName = listOf $ arbitrary `suchThat` isAlphaNum
|
|
|
|
sc :: Parser ()
|
|
sc = space (void C.spaceChar) l b
|
|
where l = skipLineComment "//"
|
|
b = skipBlockComment "/*" "*/"
|
|
|
|
sc' :: Parser ()
|
|
sc' = space (void $ C.oneOf " \t") empty empty
|
|
|
|
prop_space :: WhiteSpace -> Property
|
|
prop_space w = checkParser p r s
|
|
where p = sc
|
|
r = Right ()
|
|
s = getWhiteSpace w
|
|
|
|
prop_symbol :: Symbol -> Maybe Char -> Property
|
|
prop_symbol = parseSymbol (symbol sc) id
|
|
|
|
prop_symbol' :: Symbol -> Maybe Char -> Property
|
|
prop_symbol' = parseSymbol (symbol' sc) (fmap toLower)
|
|
|
|
parseSymbol :: (String -> Parser String) -> (String -> String)
|
|
-> Symbol -> Maybe Char -> Property
|
|
parseSymbol p' f s' t = checkParser p r s
|
|
where p = p' (f g)
|
|
r | g == s || isSpace (last s) = Right (f g)
|
|
| otherwise = posErr (length s - 1) s [uneCh (last s), exEof]
|
|
g = takeWhile (not . isSpace) s
|
|
s = getSymbol s' ++ maybeToList t
|
|
|
|
newtype IndLine = IndLine
|
|
{ getIndLine :: String }
|
|
deriving (Show, Eq)
|
|
|
|
instance Arbitrary IndLine where
|
|
arbitrary = IndLine . concat <$> sequence [spc, sym, spc, eol]
|
|
where spc = listOf (elements " \t")
|
|
sym = return "xxx"
|
|
eol = return "\n"
|
|
|
|
prop_indentGuard :: IndLine -> IndLine -> IndLine -> Property
|
|
prop_indentGuard l0 l1 l2 = checkParser p r s
|
|
where p = ip (> 1) >>= \x -> sp >> ip (== x) >> sp >> ip (> x) >> sp
|
|
ip = indentGuard sc'
|
|
sp = void $ symbol sc' "xxx" <* C.eol
|
|
r | f' l0 <= 1 = posErr 0 s msg'
|
|
| f' l1 /= f' l0 = posErr (f l1 + g [l0]) s msg'
|
|
| f' l2 <= f' l0 = posErr (f l2 + g [l0, l1]) s msg'
|
|
| otherwise = Right ()
|
|
msg' = [msg "incorrect indentation"]
|
|
f = length . takeWhile isSpace . getIndLine
|
|
f' x = sourceColumn $
|
|
updatePosString (initialPos "") $ take (f x) (getIndLine x)
|
|
g xs = sum $ length . getIndLine <$> xs
|
|
s = concat $ getIndLine <$> [l0, l1, l2]
|
|
|
|
prop_charLiteral :: String -> Bool -> Property
|
|
prop_charLiteral t i = checkParser charLiteral r s
|
|
where b = listToMaybe $ readLitChar s
|
|
(h, g) = fromJust b
|
|
r | isNothing b = posErr 0 s $ exSpec "literal character" :
|
|
[ if null s then uneEof else uneCh (head s) ]
|
|
| null g = Right h
|
|
| otherwise = posErr l s [uneCh (head g), exEof]
|
|
l = length s - length g
|
|
s = if null t || i then t else showLitChar (head t) (tail t)
|
|
|
|
prop_integer :: NonNegative Integer -> Int -> Property
|
|
prop_integer n' i = checkParser integer r s
|
|
where (r, s) = quasiCorrupted n' i showInt "integer"
|
|
|
|
prop_decimal :: NonNegative Integer -> Int -> Property
|
|
prop_decimal n' i = checkParser decimal r s
|
|
where (r, s) = quasiCorrupted n' i showInt "digit"
|
|
|
|
prop_hexadecimal :: NonNegative Integer -> Int -> Property
|
|
prop_hexadecimal n' i = checkParser hexadecimal r s
|
|
where (r, s) = quasiCorrupted n' i showHex "hexadecimal digit"
|
|
|
|
prop_octal :: NonNegative Integer -> Int -> Property
|
|
prop_octal n' i = checkParser octal r s
|
|
where (r, s) = quasiCorrupted n' i showOct "octal digit"
|
|
|
|
prop_float_0 :: NonNegative Double -> Property
|
|
prop_float_0 n' = checkParser float r s
|
|
where n = getNonNegative n'
|
|
r = Right n
|
|
s = show n
|
|
|
|
prop_float_1 :: Maybe (NonNegative Integer) -> Property
|
|
prop_float_1 n' = checkParser float r s
|
|
where r | isNothing n' = posErr 0 s [uneEof, exSpec "float"]
|
|
| otherwise = posErr (length s) s [ uneEof, exCh '.', exCh 'E'
|
|
, exCh 'e', exSpec "digit" ]
|
|
s = maybe "" (show . getNonNegative) n'
|
|
|
|
prop_number :: Either (NonNegative Integer) (NonNegative Double)
|
|
-> Integer -> Property
|
|
prop_number n' i = checkParser number r s
|
|
where r | null s = posErr 0 s [uneEof, exSpec "number"]
|
|
| otherwise =
|
|
Right $ case n' of
|
|
Left x -> Left $ getNonNegative x
|
|
Right x -> Right $ getNonNegative x
|
|
s = if i < 5
|
|
then ""
|
|
else either (show . getNonNegative) (show . getNonNegative) n'
|
|
|
|
prop_signed :: Integer -> Int -> Bool -> Property
|
|
prop_signed n i plus = checkParser p r s
|
|
where p = signed (hidden C.space) integer
|
|
r | i > length z = Right n
|
|
| otherwise = posErr i s $ [uneCh '?', exSpec "integer"] ++
|
|
(if i <= 0 then [exCh '+', exCh '-'] else []) ++
|
|
[exEof | i > head (findIndices isDigit s)]
|
|
z = let bar = showSigned showInt 0 n ""
|
|
in if n < 0 || plus then bar else '+' : bar
|
|
s = if i <= length z then take i z ++ "?" ++ drop i z else z
|
|
|
|
quasiCorrupted :: NonNegative Integer -> Int
|
|
-> (Integer -> String -> String) -> String
|
|
-> (Either ParseError Integer, String)
|
|
quasiCorrupted n' i shower l = (r, s)
|
|
where n = getNonNegative n'
|
|
r | i > length z = Right n
|
|
| otherwise = posErr i s $ [uneCh '?', exSpec l] ++
|
|
[ exEof | i > 0 ]
|
|
z = shower n ""
|
|
s = if i <= length z then take i z ++ "?" ++ drop i z else z
|