{-
	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@]	Static tests.
-}

module BishBosh.Test.HUnit.Cartesian.Coordinates(
-- * Types
-- ** Type-synonyms
	Coordinates,
-- * Constants
	testCases
) where

import qualified	BishBosh.Attribute.LogicalColourOfSquare	as Attribute.LogicalColourOfSquare
import qualified	BishBosh.Cartesian.Coordinates			as Cartesian.Coordinates
import qualified	BishBosh.Property.FixedMembership		as Property.FixedMembership
import qualified	BishBosh.Type.Length				as Type.Length
import qualified	Data.Array.IArray
import qualified	Data.List
import qualified	Test.HUnit
import			Test.HUnit((~?), (~?=), (~:))

-- | Defines a concrete type for testing.
type Coordinates	= Cartesian.Coordinates.Coordinates Type.Length.X Type.Length.Y

-- | Check the sanity of the implementation, by validating a list of static test-cases.
testCases :: Test.HUnit.Test
testCases	= Test.HUnit.test [
	all (Attribute.LogicalColourOfSquare.isBlack . Cartesian.Coordinates.getLogicalColourOfSquare) (
		Cartesian.Coordinates.extrapolate maxBound {-direction-} (minBound :: Coordinates)
	) ~? "'BishBosh.Cartesian.Coordinates.getLogicalColourOfSquare' failed to find black squares on the main diagonal.",
	"'BishBosh.Cartesian.Coordinates.getLogicalColourOfSquare' failed to count equal numbers of black & white squares." ~: (
		\(black, white) -> length black ~?= length white
	) . Data.List.partition Attribute.LogicalColourOfSquare.isBlack $ map Cartesian.Coordinates.getLogicalColourOfSquare (
		Property.FixedMembership.members	:: [Coordinates]
	),
	"'BishBosh.Cartesian.Coordinates' failed to visit all squares." ~: length (
		Property.FixedMembership.members	:: [Coordinates]
	) ~?= Cartesian.Coordinates.nSquares,
	"instance 'Data.Array.IArray.Ix Coordinates' is incompatible with instance 'Ord Coordinates'." ~: Data.Array.IArray.indices (
		Cartesian.Coordinates.listArrayByCoordinates [0 .. ]	:: Cartesian.Coordinates.ArrayByCoordinates Type.Length.X Type.Length.Y Int
	) ~?= Property.FixedMembership.members
 ]