Foldable.hs

{-
	Copyright (C) 2012-2015 Dr. Alistair Ward

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
-}
{- |
 [@AUTHOR@]	Dr. Alistair Ward

 [@DESCRIPTION@]	Defines /QuickCheck/-properties "ToolShed.Data.Foldable".
-}

module ToolShed.Test.QuickCheck.Data.Foldable(
-- * Constants
	results
) where

import			Control.Arrow((&&&))
import qualified	Data.List
import qualified	Data.List.Extra
import qualified	Data.Set
import qualified	Test.QuickCheck
import qualified	ToolShed.Data.Foldable
import			Test.QuickCheck((==>))

-- | The constant test-results for this data-type.
results :: IO [Test.QuickCheck.Result]
results	= sequence [
	let
		f :: Int -> Test.QuickCheck.Property
		f n	= Test.QuickCheck.label "prop_gatherSet" . (== l) . concat . ToolShed.Data.Foldable.gather $ Data.Set.fromDistinctAscList l	where
			l	= [0 .. n `mod` 1024]
	in Test.QuickCheck.quickCheckResult f,
	let
		f :: [Int] -> Test.QuickCheck.Property
		f	= Test.QuickCheck.label "prop_gatherBy" . uncurry (==) . (
			map Data.List.sort . ToolShed.Data.Foldable.gatherBy even &&& map Data.List.sort . Data.List.Extra.groupSortOn even
		 )
	in Test.QuickCheck.quickCheckResult f,
	let
		f :: [Int] -> Test.QuickCheck.Property
		f l	= not (null l) ==> Test.QuickCheck.label "prop_hasDuplicates" . ToolShed.Data.Foldable.hasDuplicates $ l ++ l
	in Test.QuickCheck.quickCheckResult f,
	let
		f :: [Int] -> Test.QuickCheck.Property
		f	= Test.QuickCheck.label "prop_hasDuplicates/unique" . not . ToolShed.Data.Foldable.hasDuplicates . Data.List.nub
	in Test.QuickCheck.quickCheckResult f
 ]