Quickcheck tests.
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{-# LANGUAGE FlexibleInstances #-}
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module TreeTrie where
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-- import Debug.Trace
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@ -6,6 +7,9 @@ import qualified Data.Map.Strict as Map
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import qualified Data.Set as Set
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import Test.HUnit
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import Test.QuickCheck
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import Control.Monad
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data Trie a = Mt
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| Ok a
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| Br (Map.Map Integer (Trie a), Trie a, Map.Map Char (Trie a)) -- Opens, Wild, rest
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@ -63,6 +67,7 @@ update x k w h = if k == w then Map.delete x h else Map.insert x k h
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---------------------------------------------------------------------------
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union :: Ord t => Trie (Set.Set t) -> Trie (Set.Set t) -> Trie (Set.Set t)
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union = combine unionCombine id id
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unionCombine (Ok vs) (Ok ws) = Ok (Set.union vs ws)
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unionCombine r1 r2 | null r1 = r2
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@ -91,8 +96,7 @@ seqs ('<' : n : s) r = Br (Map.singleton (read (n : []) :: Integer) (seqs s r),
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seqs ('*' : s) r = Br (Map.empty, seqs s r, Map.empty)
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seqs (x : s) r = Br (Map.empty, Mt, Map.singleton x (seqs s r))
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main = runTestTT $
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test [
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simpleTestCases = test [
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"seqs simple" ~:
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Br (Map.singleton 0 (ok [1]), Mt, Map.empty) ~=? seqs "<0" (ok [1]),
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"union simple1" ~:
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@ -195,3 +199,86 @@ main = runTestTT $
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(union (seqs "*" (ok [3])) (seqs "<2aa" (ok [1])))
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(union (seqs "*" (ok [4])) (seqs "<1b" (ok [2]))))
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]
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---------------------------------------------------------------------------
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newtype Pattern = Pattern { getPattern :: String } deriving (Eq, Ord, Show)
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newtype Message = Message { getMessage :: String } deriving (Eq, Ord, Show)
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instance Arbitrary Pattern where
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arbitrary = liftM Pattern $ sized $ trieNoLargerThan
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where leaf = oneof $ [return "x",
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return "y",
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return "z",
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return "*"]
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trieNoLargerThan leafLimit =
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if leafLimit >= 1
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then frequency [(2, leaf), (3, node leafLimit)]
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else leaf
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node leafLimit =
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do degree <- choose (0, min 4 leafLimit)
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kids <- genChildren leafLimit degree
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return $ "<" ++ show degree ++ concat kids
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genChildren leafLimit 0 = return []
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genChildren leafLimit degree =
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do childLimit <- choose (1, leafLimit - (degree - 1))
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child <- trieNoLargerThan childLimit
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rest <- genChildren (leafLimit - childLimit) (degree - 1)
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return (child : rest)
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instance Arbitrary Message where
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arbitrary = do Pattern p <- arbitrary
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m <- sequence $ [if c == '*'
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then do Message m <- scale (`div` 2) arbitrary
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return m
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else return (c : [])
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| c <- p]
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return $ Message $ concat m
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instance Arbitrary (Set.Set Integer) where
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arbitrary = resize 5 $ sized set
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where set 0 = return Set.empty
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set n = do v <- arbitrary `suchThat` (\v -> v >= 0)
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s <- set (n - 1)
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return $ Set.insert v s
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genTrie k 0 = return Mt
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genTrie k n = do Pattern p <- arbitrary
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rest <- genTrie k (n - 1)
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return $ union (seqs p k) rest
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type TrieOfPids = Trie (Set.Set Integer)
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instance Arbitrary TrieOfPids where
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-- arbitrary = do vs <- arbitrary
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-- resize 6 $ sized $ genTrie (Ok vs)
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arbitrary = resize 6 $ sized $ genTrie (ok [1])
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isWild (Br (os, w, h)) = Map.null os && Map.null h
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isWild _ = False
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trieContains t (Message m) = not $ Set.null $ route m t Set.empty
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combineBasics :: (TrieOfPids -> TrieOfPids -> TrieOfPids) ->
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(Bool -> Bool -> Bool) ->
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(TrieOfPids, TrieOfPids, Message) ->
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Property
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combineBasics tf bf (trie1, trie2, element) =
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not (isWild trie1) && not (isWild trie2) && (p || q1 || q2) ==> p == q
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where p = combined `trieContains` element
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q1 = trie1 `trieContains` element
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q2 = trie2 `trieContains` element
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q = bf q1 q2
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combined = tf trie1 trie2
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unionBasics = combineBasics union (||)
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intersectionBasics = combineBasics intersection (&&)
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differenceBasics = combineBasics difference (\ x y -> x && not y)
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qCheck name t = do putStrLn name
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quickCheckWith stdArgs { maxSuccess = 500 } t
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main = do runTestTT simpleTestCases
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qCheck "differenceBasics" differenceBasics
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qCheck "intersectionBasics" intersectionBasics
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qCheck "unionBasics" unionBasics
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