b51f0e80ed
For some reason this was working w/o a cast before, despite POSIXTime etc
being newtypes. It stopped working with the new QuickCheck:
Utility/QuickCheck.hs:31:33:
No instance for (Integral POSIXTime)
arising from a use of `arbitrarySizedIntegral'
Possible fix: add an instance declaration for (Integral POSIXTime)
In the first argument of `nonNegative', namely
`arbitrarySizedIntegral'
In the expression: nonNegative arbitrarySizedIntegral
In an equation for `arbitrary':
arbitrary = nonNegative arbitrarySizedIntegral
52 lines
1.4 KiB
Haskell
52 lines
1.4 KiB
Haskell
{- QuickCheck with additional instances
|
|
-
|
|
- Copyright 2012-2014 Joey Hess <joey@kitenet.net>
|
|
-
|
|
- 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 qualified Data.Set as S
|
|
import Control.Applicative
|
|
|
|
instance (Arbitrary k, Arbitrary v, Eq k, Ord k) => Arbitrary (M.Map k v) where
|
|
arbitrary = M.fromList <$> arbitrary
|
|
|
|
instance (Arbitrary v, Eq v, Ord v) => Arbitrary (S.Set v) where
|
|
arbitrary = S.fromList <$> arbitrary
|
|
|
|
{- Times before the epoch are excluded. -}
|
|
instance Arbitrary POSIXTime where
|
|
arbitrary = fromInteger <$> nonNegative arbitrarySizedIntegral
|
|
|
|
instance Arbitrary EpochTime where
|
|
arbitrary = fromInteger <$> 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)
|