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106 lines
4.2 KiB
Haskell
106 lines
4.2 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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module DiffSummarySpec where
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import Prologue
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import Data.Record
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import Test.Hspec
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import Test.Hspec.QuickCheck
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import Diff
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import Syntax
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import Term
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import Patch
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import Category
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import DiffSummary
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import Text.PrettyPrint.Leijen.Text (pretty)
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import Test.Hspec.QuickCheck
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import Diff.Arbitrary
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import Data.List (partition)
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import Term.Arbitrary
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import Interpreter
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import Info
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import Source
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import Data.Functor.Both
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arrayInfo :: Record '[Category, Range]
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arrayInfo = ArrayLiteral .: Range 0 3 .: RNil
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literalInfo :: Record '[Category, Range]
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literalInfo = StringLiteral .: Range 1 2 .: RNil
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testDiff :: Diff Text (Record '[Category, Range])
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testDiff = free $ Free (pure arrayInfo :< Indexed [ free $ Pure (Insert (cofree $ literalInfo :< Leaf "a")) ])
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testSummary :: DiffSummary DiffInfo
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testSummary = DiffSummary { patch = Insert (LeafInfo "string" "a"), parentAnnotations = [] }
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replacementSummary :: DiffSummary DiffInfo
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replacementSummary = DiffSummary { patch = Replace (LeafInfo "string" "a") (LeafInfo "symbol" "b"), parentAnnotations = [ ArrayLiteral ] }
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sources :: Both (Source Char)
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sources = both (fromText "[]") (fromText "[a]")
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spec :: Spec
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spec = parallel $ do
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describe "diffSummaries" $ do
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it "outputs a diff summary" $ do
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diffSummaries sources testDiff `shouldBe` [ DiffSummary { patch = Insert (LeafInfo "string" "a"), parentAnnotations = [ ArrayLiteral ] } ]
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prop "equal terms produce identity diffs" $
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\ a -> let term = toTerm (a :: ArbitraryTerm Text (Record '[Category, Range])) in
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diffSummaries sources (diffTerms wrap (==) diffCost term term) `shouldBe` []
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describe "annotatedSummaries" $ do
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it "should print adds" $
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annotatedSummaries testSummary `shouldBe` ["Added the 'a' string"]
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it "prints a replacement" $ do
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annotatedSummaries replacementSummary `shouldBe` ["Replaced the 'a' string with the 'b' symbol in the array context"]
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describe "DiffInfo" $ do
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prop "patches in summaries match the patches in diffs" $
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\a -> let
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diff = (toDiff (a :: ArbitraryDiff Text (Record '[Category, Cost, Range])))
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summaries = diffSummaries sources diff
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patches = toList diff
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in
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case (partition isBranchNode (patch <$> summaries), partition isIndexedOrFixed patches) of
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((branchPatches, otherPatches), (branchDiffPatches, otherDiffPatches)) ->
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(() <$ branchPatches, () <$ otherPatches) `shouldBe` (() <$ branchDiffPatches, () <$ otherDiffPatches)
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prop "generates one LeafInfo for each child in an arbitrary branch patch" $
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\a -> let
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diff = (toDiff (a :: ArbitraryDiff Text (Record '[Category, Range])))
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diffInfoPatches = patch <$> diffSummaries sources diff
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syntaxPatches = toList diff
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extractLeaves :: DiffInfo -> [DiffInfo]
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extractLeaves (BranchInfo children _ _) = join $ extractLeaves <$> children
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extractLeaves leaf = [ leaf ]
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extractDiffLeaves :: Term Text (Record '[Category, Range]) -> [ Term Text (Record '[Category, Range]) ]
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extractDiffLeaves term = case unwrap term of
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(Indexed children) -> join $ extractDiffLeaves <$> children
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(Fixed children) -> join $ extractDiffLeaves <$> children
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Commented children leaf -> children <> maybeToList leaf >>= extractDiffLeaves
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_ -> [ term ]
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in
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case (partition isBranchNode diffInfoPatches, partition isIndexedOrFixed syntaxPatches) of
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((branchPatches, _), (diffPatches, _)) ->
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let listOfLeaves = foldMap extractLeaves (join $ toList <$> branchPatches)
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listOfDiffLeaves = foldMap extractDiffLeaves (diffPatches >>= toList)
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in
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length listOfLeaves `shouldBe` length listOfDiffLeaves
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isIndexedOrFixed :: Patch (Term a annotation) -> Bool
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isIndexedOrFixed = any (isIndexedOrFixed' . unwrap)
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isIndexedOrFixed' :: Syntax a f -> Bool
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isIndexedOrFixed' syntax = case syntax of
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(Indexed _) -> True
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(Fixed _) -> True
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_ -> False
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isBranchInfo :: DiffInfo -> Bool
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isBranchInfo info = case info of
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(BranchInfo _ _ _) -> True
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(LeafInfo _ _) -> False
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isBranchNode :: Patch DiffInfo -> Bool
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isBranchNode = any isBranchInfo
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