@@ -0,0 +1,43 @@
1+{-# LANGUAGE TemplateHaskell #-}
4+import Test.HUnit (runTestTT, (~:), assertEqual, errors, failures, test)
5+import Data.Patch ( Patch(apply) )
6+import Data.Patch.MapWithMove ( patchThatChangesMap )
7+import Data.Map as Map ( Map, fromList, singleton )
8+import Hedgehog (checkParallel, discover, Property, property, forAll, PropertyT, (===))
9+import Hedgehog.Gen as Gen ( int )
10+import Hedgehog.Range as Range ( linear )
11+import Control.Monad (replicateM)
12+import System.Exit (exitFailure, exitSuccess)
13+import Data.Sequence as Seq ( foldMapWithIndex, replicateM )
17+ counts <- runTestTT $ test [
19+ let mapBefore = Map.fromList [(0,1)]
20+ mapAfter = Map.fromList [(0,0),(1,1)]
21+ patch = patchThatChangesMap mapBefore mapAfter
22+ afterPatch = apply patch mapBefore
23+ assertEqual "Patch creates the same Map" (Just mapAfter) afterPatch),
24+ "Property Checks" ~: propertyChecks
26+ if errors counts + failures counts == 0 then exitSuccess else exitFailure
28+propertyChecks :: IO Bool
29+propertyChecks = checkParallel $$(discover)
31+prop_patchThatChangesMap :: Property
32+prop_patchThatChangesMap = property $ do
33+ mapBefore <- makeRandomIntMap
34+ mapAfter <- makeRandomIntMap
35+ let patch = patchThatChangesMap mapBefore mapAfter
36+ Just mapAfter === apply patch mapBefore
38+makeRandomIntMap :: Monad m => PropertyT m (Map Int Int)
40+ let genNum = Gen.int (Range.linear 0 100)
41+ length <- forAll genNum
42+ listOfNumbers <- forAll $ Seq.replicateM length genNum
43+ pure $ Seq.foldMapWithIndex Map.singleton listOfNumbers