Testing with Tasty

SmallCheck, QuickCheck and HUnit

import Test.Tasty
import Test.Tasty.SmallCheck as SC
import Test.Tasty.QuickCheck as QC
import Test.Tasty.HUnit


main :: IO ()
main = defaultMain tests

tests :: TestTree
tests = testGroup "Tests" [smallCheckTests, quickCheckTests, unitTests]

smallCheckTests :: TestTree
smallCheckTests = testGroup "SmallCheck Tests"
  [ SC.testProperty "String length <= 3" $
      \s -> length (take 3 (s :: String)) <= 3
  , SC.testProperty "String length <= 2" $  -- should fail
      \s -> length (take 3 (s :: String)) <= 2
  ]

quickCheckTests :: TestTree
quickCheckTests = testGroup "QuickCheck Tests"
  [ QC.testProperty "String length <= 5" $
      \s -> length (take 5 (s :: String)) <= 5
  , QC.testProperty "String length <= 4" $  -- should fail
      \s -> length (take 5 (s :: String)) <= 4
  ]

unitTests :: TestTree
unitTests = testGroup "Unit Tests"
  [ testCase "String comparison 1" $
      assertEqual "description" "OK" "OK"

  , testCase "String comparison 2" $  -- should fail
      assertEqual "description" "fail" "fail!"
  ]

Install packages:

cabal install tasty-smallcheck tasty-quickcheck tasty-hunit

Run with cabal:

cabal exec runhaskell test.hs