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37 lines
1.5 KiB
Haskell
37 lines
1.5 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) `In` Leaf "t\776"
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termB = Term $ (StringLiteral :. Nil) `In` Leaf "\7831" in
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diffTerms termA termB `shouldBe` replacing termA termB
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prop "produces correct diffs" $
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\ a b -> let diff = diffTerms a b :: Diff Syntax (Record '[Category]) (Record '[Category]) in
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(beforeTerm diff, afterTerm diff) `shouldBe` (Just a, Just b)
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prop "constructs zero-cost diffs of equal terms" $
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\ a -> let diff = diffTerms a a :: Diff Syntax (Record '[Category]) (Record '[Category]) 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) `In` Indexed [ Term ((StringLiteral :. Nil) `In` Leaf s) ]) :: Term Syntax (Record '[Category])
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root = termIn (Program :. Nil) . Indexed in
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diffTerms (root [ term "b" ]) (root [ term "a", term "b" ]) `shouldBe` merge ((Program :. Nil, Program :. Nil)) (Indexed [ inserting (term "a"), cata (\ (In a r) -> merge (a, a) r) (term "b") ])
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