{-# OPTIONS_GHC -fno-warn-orphans #-}
{-
	Copyright (C) 2018 Dr. Alistair Ward

	This file is part of BishBosh.

	BishBosh 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.

	BishBosh 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 BishBosh.  If not, see <http://www.gnu.org/licenses/>.
-}
{- |
 [@AUTHOR@]	Dr. Alistair Ward

 [@DESCRIPTION@]	Implements 'Test.QuickCheck.Arbitrary' & defines /QuickCheck/-properties.
-}

module BishBosh.Test.QuickCheck.Component.Piece(
-- * Constants
	results
) where

import			Control.Arrow((&&&))
import qualified	BishBosh.Component.Piece		as Component.Piece
import qualified	BishBosh.Property.FixedMembership	as Property.FixedMembership
import qualified	BishBosh.Property.ForsythEdwards	as Property.ForsythEdwards
import qualified	BishBosh.Property.Opposable		as Property.Opposable
import qualified	Test.QuickCheck
import qualified	ToolShed.Test.ReversibleIO

instance Test.QuickCheck.Arbitrary Component.Piece.Piece where
	arbitrary	= Test.QuickCheck.elements Property.FixedMembership.members

-- | The constant test-results for this data-type.
results :: IO [Test.QuickCheck.Result]
results	= sequence [
	let
		f :: Component.Piece.Piece -> Test.QuickCheck.Property
		f	= Test.QuickCheck.label "Piece.prop_getOpposite" . uncurry (==) . (Property.Opposable.getOpposite . Property.Opposable.getOpposite &&& id)
	in Test.QuickCheck.quickCheckWithResult Test.QuickCheck.stdArgs { Test.QuickCheck.maxSuccess = 16 } f,
	let
		f :: Component.Piece.Piece -> Test.QuickCheck.Property
		f	= Test.QuickCheck.label "Piece.prop_readPrependedWhiteSpace" . ToolShed.Test.ReversibleIO.readPrependedWhiteSpace
	in Test.QuickCheck.quickCheckWithResult Test.QuickCheck.stdArgs { Test.QuickCheck.maxSuccess = 256 } f,
	let
		f :: String -> Test.QuickCheck.Property
		f garbage	= Test.QuickCheck.label "Piece.prop_read" $ case (reads garbage :: [(Component.Piece.Piece, String)]) of
			[_]	-> True
			_	-> True	-- Unless the read-implementation throws an exception.
	in Test.QuickCheck.quickCheckWithResult Test.QuickCheck.stdArgs { Test.QuickCheck.maxSuccess = 256 } f,
	let
		f :: Component.Piece.Piece -> String -> Test.QuickCheck.Property
		f piece	= Test.QuickCheck.label "Piece.prop_readTrailingGarbage" . ToolShed.Test.ReversibleIO.readTrailingGarbage (const False) piece
	in Test.QuickCheck.quickCheckWithResult Test.QuickCheck.stdArgs { Test.QuickCheck.maxSuccess = 256 } f,
	let
		f :: Component.Piece.Piece -> Test.QuickCheck.Property
		f piece	= Test.QuickCheck.label "Piece.prop_fen" $ case Property.ForsythEdwards.readsFEN $ Property.ForsythEdwards.showFEN piece of
			[(piece', "")]	-> piece' == piece
			_		-> False
	in Test.QuickCheck.quickCheckWithResult Test.QuickCheck.stdArgs { Test.QuickCheck.maxSuccess = 32 } f
 ]