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28 lines
766 B
Haskell
28 lines
766 B
Haskell
module TermSpec where
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import Test.Hspec
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import Test.Hspec.QuickCheck
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import Data.Text.Arbitrary ()
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import Prologue
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import Data.String
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import Category
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import Interpreter
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import Diff
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import ArbitraryTerm
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spec :: Spec
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spec = parallel $ do
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describe "Term" $ do
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prop "equality is reflexive" $
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\ a -> unTerm a == unTerm (a :: ArbitraryTerm String ())
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describe "Diff" $ do
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prop "equality is reflexive" $
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\ a b -> let diff = interpret ((==) `on` category) diffCost (unTerm a) (unTerm (b :: ArbitraryTerm String CategorySet)) in
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diff == diff
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prop "equal terms produce identity diffs" $
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\ a -> let term = unTerm (a :: ArbitraryTerm String CategorySet) in
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diffCost (interpret ((==) `on` category) diffCost term term) == 0
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