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{-# OPTIONS -fno-warn-orphans #-}
import Language.SQL.Keyword
(Keyword (Sequence), DString, (<++>))
import Data.Monoid (Monoid, mempty, (<>))
import Data.String (fromString)
import Test.QuickCheck (Arbitrary (..), Testable)
import Test.QuickCheck.Simple (Test, qcTest, defaultMain)
prop :: Testable prop => String -> prop -> Test
prop = qcTest
leftId :: (Eq a, Monoid a) => a -> Bool
leftId a = mempty <> a == a
rightId :: (Eq a, Monoid a) => a -> Bool
rightId a = a <> mempty == a
assoc :: (Eq a, Monoid a) => a -> a -> a -> Bool
assoc a b c = (a <> b) <> c == a <> (b <> c)
dsLeftId :: DString -> Bool
dsLeftId = leftId
dsRightId :: DString -> Bool
dsRightId = rightId
dsAssoc :: DString -> DString -> DString -> Bool
dsAssoc = assoc
instance Arbitrary DString where
arbitrary = fmap read arbitrary
kwLeftId :: Keyword -> Bool
kwLeftId = leftId
kwRightId :: Keyword -> Bool
kwRightId = rightId
kwAssoc :: Keyword -> Keyword -> Keyword -> Bool
kwAssoc = assoc
instance Arbitrary Keyword where
arbitrary = fmap fromString arbitrary
concatCommutative :: DString -> DString -> Bool
concatCommutative x y =
Sequence x <++> Sequence y
==
Sequence (x <> y)
tests :: [Test]
tests = [ prop "DString left Id" dsLeftId
, prop "DString right Id" dsRightId
, prop "DString associativity" dsAssoc
, prop "Keyword left Id" kwLeftId
, prop "Keyword right Id" kwRightId
, prop "Keyword associativity" kwAssoc
, prop "concat commutative" concatCommutative
]
main :: IO ()
main = defaultMain tests
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