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40 lines
1.4 KiB
Haskell
40 lines
1.4 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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module Diff.Spec where
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import Category
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import Data.Record
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import Data.Text.Arbitrary ()
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import Diff
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import Diff.Arbitrary
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import Interpreter
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import Prologue
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import Term
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import Term.Arbitrary
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import Test.Hspec
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import Test.Hspec.QuickCheck
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import Test.QuickCheck
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spec :: Spec
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spec = parallel $ do
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prop "equality is reflexive" $
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\ a b -> let diff = diffTerms wrap (==) diffCost (toTerm a) (toTerm (b :: ArbitraryTerm Text (Record '[Category]))) in
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diff `shouldBe` diff
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prop "equal terms produce identity diffs" . forAll (toTerm <$> arbitrary) $
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\ a -> let term = a :: Term Text (Record '[Category]) in
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diffCost (diffTerms wrap (==) diffCost term term) `shouldBe` 0
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describe "beforeTerm" $ do
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prop "recovers the before term" $
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\ a b -> let diff = diffTerms wrap (==) diffCost (toTerm a) (toTerm (b :: ArbitraryTerm Text (Record '[Category]))) in
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beforeTerm diff `shouldBe` Just (toTerm a)
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describe "afterTerm" $ do
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prop "recovers the after term" $
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\ a b -> let diff = diffTerms wrap (==) diffCost (toTerm a) (toTerm (b :: ArbitraryTerm Text (Record '[Category]))) in
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afterTerm diff `shouldBe` Just (toTerm b)
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describe "ArbitraryDiff" $ do
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prop "generates diffs of a specific size" . forAll ((arbitrary >>= \ n -> (,) n <$> diffOfSize n) `suchThat` ((> 0) . fst)) $
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\ (n, diff) -> arbitraryDiffSize (diff :: ArbitraryDiff Text ()) `shouldBe` n
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