21 lines
550 B
Haskell
21 lines
550 B
Haskell
module Terminal.Game.RandomSpec where
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import Test.Hspec
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import Test.Hspec.QuickCheck
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import Terminal.Game.Random
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spec :: Spec
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spec = do
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describe "pickRandom" $ do
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prop "picks items at random from a list" $
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\i -> let g = mkStdGen i
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in fst (pickRandom ['a', 'b'] g) /= 'c'
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prop "does not exclude any item" $
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\i -> let g = mkStdGen i
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rf tg = pickRandom [1,2] tg
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rs = iterate (\(_, lg') -> rf lg') (rf g)
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ts = take 100 rs
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in sum (map fst ts) /= length ts
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