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38 lines
1.6 KiB
Haskell
38 lines
1.6 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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module InterpreterSpec where
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import Category
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import Data.Functor.Both
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import Data.Functor.Foldable hiding (Nil)
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import Data.Functor.Listable
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import Data.Record
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import Diff
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import Interpreter
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import Syntax
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import Term
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import Test.Hspec (Spec, describe, it, parallel)
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import Test.Hspec.Expectations.Pretty
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import Test.Hspec.LeanCheck
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spec :: Spec
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spec = parallel $ do
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describe "interpret" $ do
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it "returns a replacement when comparing two unicode equivalent terms" $
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let termA = Term $ (StringLiteral :. Nil) :< Leaf "t\776"
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termB = Term $ (StringLiteral :. Nil) :< Leaf "\7831" in
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diffTerms (both termA termB) `shouldBe` replacing termA termB
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prop "produces correct diffs" $
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\ a b -> let diff = diffTerms (unListableF <$> both a b :: Both (SyntaxTerm '[Category])) in
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(beforeTerm diff, afterTerm diff) `shouldBe` (Just (unListableF a), Just (unListableF b))
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prop "constructs zero-cost diffs of equal terms" $
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\ a -> let term = (unListableF a :: SyntaxTerm '[Category])
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diff = diffTerms (pure term) in
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diffCost diff `shouldBe` 0
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it "produces unbiased insertions within branches" $
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let term s = Term ((StringLiteral :. Nil) :< Indexed [ Term ((StringLiteral :. Nil) :< Leaf s) ]) :: SyntaxTerm '[Category]
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root = Term . ((Program :. Nil) :<) . Indexed in
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diffTerms (both (root [ term "b" ]) (root [ term "a", term "b" ])) `shouldBe` copy (pure (Program :. Nil)) (Indexed [ inserting (term "a"), cata (\ (a :< r) -> copy (pure a) r) (term "b") ])
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