41 lines
858 B
Haskell
41 lines
858 B
Haskell
import Protolude
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import Test.Tasty
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import Test.Tasty.HUnit
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import Test.Tasty.SmallCheck
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inc :: Int -> Int
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inc = (+1)
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main :: IO ()
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main = defaultMain $ testGroup "all-tests" tests
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tests :: [TestTree]
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tests =
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[ testGroup "SmallCheck" scTests
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, testGroup "Unit tests" huTests
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]
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scTests :: [TestTree]
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scTests =
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[ testProperty "inc == succ" prop_succ
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, testProperty "inc . negate == negate . pred" prop_pred
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]
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huTests :: [TestTree]
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huTests =
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[ testCase "Increment below TheAnswer" case_inc_below
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, testCase "Decrement above TheAnswer" case_dec_above
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]
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prop_succ :: Int -> Bool
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prop_succ n = inc n == succ n
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prop_pred :: Int -> Bool
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prop_pred n = inc (negate n) == negate (pred n)
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case_inc_below :: Assertion
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case_inc_below = inc 41 @?= (42 :: Int)
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case_dec_above :: Assertion
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case_dec_above = negate (inc (negate 43)) @?= (42 :: Int)
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