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-rw-r--r--test/Test.hs20
1 files changed, 19 insertions, 1 deletions
diff --git a/test/Test.hs b/test/Test.hs
index 4aa3197..6741e70 100644
--- a/test/Test.hs
+++ b/test/Test.hs
@@ -1,4 +1,4 @@
-{-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE TemplateHaskell, ParallelListComp #-}
-- vim: sw=2 ts=2 et ai:
module Test where
@@ -28,6 +28,17 @@ atAnyState ok pgn = and [ok b | Right b <- seqList [moveSAN m | m <- moves pgn]
seqList _ (Left _) = []
seqList [] _ = []
+atAnyTwoStates :: (Board -> Board -> Bool) -> PGN -> Bool
+atAnyTwoStates ok pgn =
+ let moveList = seqList [moveSAN m | m <- moves pgn] $ Right defaultBoard in
+ and [ok b1 b2 | Right b1 <- moveList | Right b2 <- tail moveList]
+ where
+ seqList :: [r -> Either e r] -> Either e r -> [Either e r]
+ seqList (f:fs) (Right io) = f io:seqList fs (f io)
+ seqList _ (Left _) = []
+ seqList [] _ = []
+
+
prop_checkPGN :: PGN -> Bool
prop_checkPGN pgn
| isLeft parsed = False
@@ -83,5 +94,12 @@ prop_only_2_kings = atAnyState (\b ->
length (pieceCoords (Just Black) (Just King) b) == 1 &&
length (pieceCoords (Just White) (Just King) b) == 1)
+prop_number_of_pieces :: PGN -> Bool
+prop_number_of_pieces = atAnyTwoStates (\b1 b2 ->
+ length (pieceCoords Nothing Nothing b1) == length (pieceCoords Nothing Nothing b2)
+ ||
+ length (pieceCoords Nothing Nothing b1) - 1 == length (pieceCoords Nothing Nothing b2)
+ )
+
return []
main = $forAllProperties (quickCheckWithResult (stdArgs {maxSuccess=10000}))