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122 lines
4.6 KiB
Haskell
122 lines
4.6 KiB
Haskell
--
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-- QuickCheck tests for Megaparsec's textual source positions.
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--
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-- Copyright © 2015–2016 Megaparsec contributors
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--
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-- Redistribution and use in source and binary forms, with or without
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-- modification, are permitted provided that the following conditions are
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-- met:
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--
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-- * Redistributions of source code must retain the above copyright notice,
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-- this list of conditions and the following disclaimer.
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--
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-- * Redistributions in binary form must reproduce the above copyright
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-- notice, this list of conditions and the following disclaimer in the
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-- documentation and/or other materials provided with the distribution.
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--
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-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS “AS IS” AND ANY
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-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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-- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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-- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
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-- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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-- ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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-- POSSIBILITY OF SUCH DAMAGE.
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{-# LANGUAGE CPP #-}
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{-# OPTIONS -fno-warn-orphans #-}
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module Pos (tests) where
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import Control.Monad.Catch
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import Data.Function (on)
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import Data.List (isInfixOf, elemIndices)
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import Data.Semigroup ((<>))
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import Test.Framework
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import Test.Framework.Providers.QuickCheck2 (testProperty)
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import Test.QuickCheck
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import Text.Megaparsec.Pos
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import Util (updatePosString)
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#if !MIN_VERSION_base(4,8,0)
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import Control.Applicative ((<$>), (<*>), pure)
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#endif
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tests :: Test
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tests = testGroup "Textual source positions"
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[ testProperty "creation of Pos (mkPos)" prop_mkPos
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, testProperty "creation of Pos (unsafePos)" prop_unsafePos
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, testProperty "consistency of Show/Read for Pos" prop_showReadPos
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, testProperty "Ord instance of Pos" prop_ordPos
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, testProperty "Semigroup instance of Pos" prop_semigroupPos
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, testProperty "construction of initial position" prop_initialPos
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, testProperty "consistency of Show/Read for SourcePos" prop_showReadSourcePos
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, testProperty "pretty-printing: visible file path" prop_ppFilePath
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, testProperty "pretty-printing: visible line" prop_ppLine
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, testProperty "pretty-printing: visible column" prop_ppColumn
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, testProperty "default updating of source position" prop_defaultUpdatePos ]
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prop_mkPos :: Word -> Property
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prop_mkPos x' = case mkPos x' of
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Left e -> fromException e === Just InvalidPosException
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Right x -> unPos x === x'
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prop_unsafePos :: Positive Word -> Property
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prop_unsafePos x' = unPos (unsafePos x) === x
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where x = getPositive x'
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prop_showReadPos :: Pos -> Property
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prop_showReadPos x = read (show x) === x
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prop_ordPos :: Pos -> Pos -> Property
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prop_ordPos x y = compare x y === (compare `on` unPos) x y
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prop_semigroupPos :: Pos -> Pos -> Property
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prop_semigroupPos x y =
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x <> y === unsafePos (unPos x + unPos y) .&&.
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unPos (x <> y) === unPos x + unPos y
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prop_initialPos :: String -> Property
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prop_initialPos fp =
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sourceName x === fp .&&.
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sourceLine x === unsafePos 1 .&&.
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sourceColumn x === unsafePos 1
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where x = initialPos fp
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prop_showReadSourcePos :: SourcePos -> Property
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prop_showReadSourcePos x = read (show x) === x
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prop_ppFilePath :: SourcePos -> Property
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prop_ppFilePath x = property $
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sourceName x `isInfixOf` sourcePosPretty x
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prop_ppLine :: SourcePos -> Property
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prop_ppLine x = property $
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(show . unPos . sourceLine) x `isInfixOf` sourcePosPretty x
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prop_ppColumn :: SourcePos -> Property
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prop_ppColumn x = property $
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(show . unPos . sourceColumn) x `isInfixOf` sourcePosPretty x
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prop_defaultUpdatePos :: Pos -> SourcePos -> String -> Property
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prop_defaultUpdatePos w pos "" = updatePosString w pos "" === pos
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prop_defaultUpdatePos w pos s =
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sourceName updated === sourceName pos .&&.
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unPos (sourceLine updated) === unPos (sourceLine pos) + inclines .&&.
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cols >= mincols && ((last s /= '\t') || ((cols - 1) `rem` unPos w == 0))
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where
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updated = updatePosString w pos s
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cols = unPos (sourceColumn updated)
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newlines = elemIndices '\n' s
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inclines = fromIntegral (length newlines)
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total = fromIntegral (length s)
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mincols =
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if null newlines
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then total + unPos (sourceColumn pos)
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else total - fromIntegral (maximum newlines)
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