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55 lines
2.6 KiB
Haskell
55 lines
2.6 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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module Data.RandomWalkSimilarity.Spec where
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import Category
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import Control.Comonad.Trans.Cofree (headF)
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import Control.Monad.Free (wrap)
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import Data.Array.IArray
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import Data.Bifunctor
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import Data.Functor.Listable
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import Data.Record
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import Data.These
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import Diff
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import Info
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import Patch
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import RWS
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import Syntax
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import Term
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import Test.Hspec
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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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let positively = succ . abs
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describe "pqGramDecorator" $ do
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prop "produces grams with stems of the specified length" $
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\ (term, p, q) -> pqGramDecorator (rhead . headF) (positively p) (positively q) (unListableF term :: SyntaxTerm '[Category]) `shouldSatisfy` all ((== positively p) . length . stem . rhead)
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prop "produces grams with bases of the specified width" $
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\ (term, p, q) -> pqGramDecorator (rhead . headF) (positively p) (positively q) (unListableF term :: SyntaxTerm '[Category]) `shouldSatisfy` all ((== positively q) . length . base . rhead)
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describe "featureVectorDecorator" $ do
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prop "produces a vector of the specified dimension" $
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\ (term, p, q, d) -> featureVectorDecorator (rhead . headF) (positively p) (positively q) (positively d) (unListableF term :: SyntaxTerm '[Category]) `shouldSatisfy` all ((== (0, abs d)) . bounds . rhead)
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describe "rws" $ do
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prop "produces correct diffs" $
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\ (as, bs) -> let tas = decorate <$> (unListableF <$> as :: [SyntaxTerm '[Category]])
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tbs = decorate <$> (unListableF <$> bs :: [SyntaxTerm '[Category]])
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root = cofree . ((Program :. Nil) :<) . Indexed
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diff = wrap (pure (Program :. Nil) :< Indexed (stripDiff . diffThese <$> rws editDistance canCompare tas tbs)) in
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(beforeTerm diff, afterTerm diff) `shouldBe` (Just (root (stripTerm <$> tas)), Just (root (stripTerm <$> tbs)))
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it "produces unbiased insertions within branches" $
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let (a, b) = (decorate (cofree ((StringLiteral :. Nil) :< Indexed [ cofree ((StringLiteral :. Nil) :< Leaf "a") ])), decorate (cofree ((StringLiteral :. Nil) :< Indexed [ cofree ((StringLiteral :. Nil) :< Leaf "b") ]))) in
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fmap (bimap stripTerm stripTerm) (rws editDistance canCompare [ b ] [ a, b ]) `shouldBe` fmap (bimap stripTerm stripTerm) [ That a, These b b ]
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where canCompare a b = headF a == headF b
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decorate :: SyntaxTerm '[Category] -> SyntaxTerm '[FeatureVector, Category]
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decorate = defaultFeatureVectorDecorator (category . headF)
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diffThese = these deleting inserting replacing
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editDistance = these (const 1) (const 1) (const (const 0))
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