From a4f3e112954e1b785c84c339bcbd83597a89335e Mon Sep 17 00:00:00 2001 From: Joey Hess Date: Tue, 3 Dec 2013 15:02:21 -0400 Subject: git-repair (1.20131203) unstable; urgency=low * Fix build deps. Closes: #731179 # imported from the archive --- Utility/QuickCheck.hs | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 Utility/QuickCheck.hs (limited to 'Utility/QuickCheck.hs') diff --git a/Utility/QuickCheck.hs b/Utility/QuickCheck.hs new file mode 100644 index 0000000..82af09f --- /dev/null +++ b/Utility/QuickCheck.hs @@ -0,0 +1,48 @@ +{- QuickCheck with additional instances + - + - Copyright 2012 Joey Hess + - + - Licensed under the GNU GPL version 3 or higher. + -} + +{-# OPTIONS_GHC -fno-warn-orphans #-} +{-# LANGUAGE TypeSynonymInstances #-} + +module Utility.QuickCheck + ( module X + , module Utility.QuickCheck + ) where + +import Test.QuickCheck as X +import Data.Time.Clock.POSIX +import System.Posix.Types +import qualified Data.Map as M +import Control.Applicative + +instance (Arbitrary k, Arbitrary v, Eq k, Ord k) => Arbitrary (M.Map k v) where + arbitrary = M.fromList <$> arbitrary + +{- Times before the epoch are excluded. -} +instance Arbitrary POSIXTime where + arbitrary = nonNegative arbitrarySizedIntegral + +instance Arbitrary EpochTime where + arbitrary = nonNegative arbitrarySizedIntegral + +{- Pids are never negative, or 0. -} +instance Arbitrary ProcessID where + arbitrary = arbitrarySizedBoundedIntegral `suchThat` (> 0) + +{- Inodes are never negative. -} +instance Arbitrary FileID where + arbitrary = nonNegative arbitrarySizedIntegral + +{- File sizes are never negative. -} +instance Arbitrary FileOffset where + arbitrary = nonNegative arbitrarySizedIntegral + +nonNegative :: (Num a, Ord a) => Gen a -> Gen a +nonNegative g = g `suchThat` (>= 0) + +positive :: (Num a, Ord a) => Gen a -> Gen a +positive g = g `suchThat` (> 0) -- cgit v1.2.3