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https://github.com/github/semantic.git
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238 lines
12 KiB
Haskell
238 lines
12 KiB
Haskell
{-# OPTIONS_GHC -fno-warn-orphans #-}
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{-# LANGUAGE DataKinds, TypeOperators #-}
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module TOCSpec where
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import Data.Aeson
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import Category as C
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import Data.Blob
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import Data.Functor.Both
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import Data.Functor.Listable
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import Data.Record
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import Data.Source
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import Data.Text.Listable
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import Data.These
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import Diff
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import Info
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import Interpreter
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import Language
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import Patch
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import Prologue hiding (fst, snd, readFile)
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import Renderer
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import Renderer.TOC
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import RWS
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import Semantic
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import Semantic.Task
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import SpecHelpers
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import Syntax as S
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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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import Test.LeanCheck
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spec :: Spec
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spec = parallel $ do
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describe "tableOfContentsBy" $ do
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prop "drops all nodes with the constant Nothing function" $
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\ diff -> tableOfContentsBy (const Nothing :: a -> Maybe ()) (unListableDiff diff :: Diff Syntax ()) `shouldBe` []
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let diffSize = max 1 . sum . fmap (const 1)
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let lastValue a = fromMaybe (extract a) (getLast (foldMap (Last . Just) a))
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prop "includes all nodes with a constant Just function" $
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\ diff -> let diff' = (unListableDiff diff :: Diff Syntax ()) in entryPayload <$> tableOfContentsBy (const (Just ())) diff' `shouldBe` replicate (diffSize diff') ()
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prop "produces an unchanged entry for identity diffs" $
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\ term -> let term' = (unListableF term :: Term Syntax (Record '[Category])) in tableOfContentsBy (Just . headF) (diffTerms (pure term')) `shouldBe` [Unchanged (lastValue term')]
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prop "produces inserted/deleted/replaced entries for relevant nodes within patches" $
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\ patch -> let patch' = (unListableF <$> patch :: Patch (Term Syntax Int)) in tableOfContentsBy (Just . headF) (pure patch') `shouldBe` these (pure . Deleted) (pure . Inserted) ((<>) `on` pure . Replaced) (unPatch (lastValue <$> patch'))
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prop "produces changed entries for relevant nodes containing irrelevant patches" $
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\ diff -> let diff' = fmap (1 <$) <$> mapAnnotations (const (0 :: Int)) (wrap (pure 0 :< Indexed [unListableDiff diff :: Diff Syntax Int])) in
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tableOfContentsBy (\ (n :< _) -> if n == 0 then Just n else Nothing) diff' `shouldBe`
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if Prologue.null diff' then [Unchanged 0]
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else replicate (length diff') (Changed 0)
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describe "diffTOC" $ do
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it "blank if there are no methods" $
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diffTOC blankDiff `shouldBe` [ ]
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it "summarizes changed methods" $ do
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sourceBlobs <- blobsForPaths (both "ruby/methods.A.rb" "ruby/methods.B.rb")
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Just diff <- runTask (diffBlobPair IdentityDiffRenderer sourceBlobs)
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diffTOC diff `shouldBe`
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[ JSONSummary "Method" "self.foo" (sourceSpanBetween (1, 1) (2, 4)) "added"
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, JSONSummary "Method" "bar" (sourceSpanBetween (4, 1) (6, 4)) "modified"
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, JSONSummary "Method" "baz" (sourceSpanBetween (4, 1) (5, 4)) "removed" ]
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it "dedupes changes in same parent method" $ do
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sourceBlobs <- blobsForPaths (both "javascript/duplicate-parent.A.js" "javascript/duplicate-parent.B.js")
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Just diff <- runTask (diffBlobPair IdentityDiffRenderer sourceBlobs)
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diffTOC diff `shouldBe`
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[ JSONSummary "Function" "myFunction" (sourceSpanBetween (1, 1) (6, 2)) "modified" ]
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it "dedupes similar methods" $ do
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sourceBlobs <- blobsForPaths (both "javascript/erroneous-duplicate-method.A.js" "javascript/erroneous-duplicate-method.B.js")
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Just diff <- runTask (diffBlobPair IdentityDiffRenderer sourceBlobs)
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diffTOC diff `shouldBe`
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[ JSONSummary "Function" "performHealthCheck" (sourceSpanBetween (8, 1) (29, 2)) "modified" ]
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it "summarizes Go methods with receivers with special formatting" $ do
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sourceBlobs <- blobsForPaths (both "go/method-with-receiver.A.go" "go/method-with-receiver.B.go")
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Just diff <- runTask (diffBlobPair IdentityDiffRenderer sourceBlobs)
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diffTOC diff `shouldBe`
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[ JSONSummary "Method" "(*apiClient) CheckAuth" (sourceSpanBetween (3,1) (3,101)) "added" ]
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it "summarizes Ruby methods that start with two identifiers" $ do
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sourceBlobs <- blobsForPaths (both "ruby/method-starts-with-two-identifiers.A.rb" "ruby/method-starts-with-two-identifiers.B.rb")
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Just diff <- runTask (diffBlobPair IdentityDiffRenderer sourceBlobs)
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diffTOC diff `shouldBe`
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[ JSONSummary "Method" "foo" (sourceSpanBetween (1, 1) (4, 4)) "modified" ]
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it "handles unicode characters in file" $ do
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sourceBlobs <- blobsForPaths (both "ruby/unicode.A.rb" "ruby/unicode.B.rb")
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Just diff <- runTask (diffBlobPair IdentityDiffRenderer sourceBlobs)
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diffTOC diff `shouldBe`
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[ JSONSummary "Method" "foo" (sourceSpanBetween (6, 1) (7, 4)) "added" ]
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it "properly slices source blob that starts with a newline and has multi-byte chars" $ do
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sourceBlobs <- blobsForPaths (both "javascript/starts-with-newline.js" "javascript/starts-with-newline.js")
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Just diff <- runTask (diffBlobPair IdentityDiffRenderer sourceBlobs)
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diffTOC diff `shouldBe` []
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prop "inserts of methods and functions are summarized" $
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\name body ->
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let diff = programWithInsert name (unListableF body)
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in numTocSummaries diff `shouldBe` 1
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prop "deletes of methods and functions are summarized" $
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\name body ->
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let diff = programWithDelete name (unListableF body)
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in numTocSummaries diff `shouldBe` 1
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prop "replacements of methods and functions are summarized" $
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\name body ->
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let diff = programWithReplace name (unListableF body)
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in numTocSummaries diff `shouldBe` 1
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prop "changes inside methods and functions are summarizied" . forAll (isMeaningfulTerm `filterT` tiers) $
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\body ->
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let diff = programWithChange (unListableF body)
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in numTocSummaries diff `shouldBe` 1
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prop "other changes don't summarize" . forAll ((not . isMethodOrFunction) `filterT` tiers) $
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\body ->
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let diff = programWithChangeOutsideFunction (unListableF body)
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in numTocSummaries diff `shouldBe` 0
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prop "equal terms produce identity diffs" $
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\a -> let term = defaultFeatureVectorDecorator (Info.category . headF) (unListableF a :: Term') in
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diffTOC (diffTerms (pure term)) `shouldBe` []
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describe "JSONSummary" $ do
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it "encodes modified summaries to JSON" $ do
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let summary = JSONSummary "Method" "foo" (sourceSpanBetween (1, 1) (4, 4)) "modified"
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encode summary `shouldBe` "{\"span\":{\"start\":[1,1],\"end\":[4,4]},\"category\":\"Method\",\"term\":\"foo\",\"changeType\":\"modified\"}"
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it "encodes added summaries to JSON" $ do
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let summary = JSONSummary "Method" "self.foo" (sourceSpanBetween (1, 1) (2, 4)) "added"
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encode summary `shouldBe` "{\"span\":{\"start\":[1,1],\"end\":[2,4]},\"category\":\"Method\",\"term\":\"self.foo\",\"changeType\":\"added\"}"
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describe "diff with ToCDiffRenderer" $ do
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it "produces JSON output" $ do
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blobs <- blobsForPaths (both "ruby/methods.A.rb" "ruby/methods.B.rb")
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output <- runTask (diffBlobPair ToCDiffRenderer blobs)
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toS output `shouldBe` ("{\"changes\":{\"test/fixtures/toc/ruby/methods.A.rb -> test/fixtures/toc/ruby/methods.B.rb\":[{\"span\":{\"start\":[1,1],\"end\":[2,4]},\"category\":\"Method\",\"term\":\"self.foo\",\"changeType\":\"added\"},{\"span\":{\"start\":[4,1],\"end\":[6,4]},\"category\":\"Method\",\"term\":\"bar\",\"changeType\":\"modified\"},{\"span\":{\"start\":[4,1],\"end\":[5,4]},\"category\":\"Method\",\"term\":\"baz\",\"changeType\":\"removed\"}]},\"errors\":{}}\n" :: ByteString)
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it "produces JSON output if there are parse errors" $ do
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blobs <- blobsForPaths (both "ruby/methods.A.rb" "ruby/methods.X.rb")
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output <- runTask (diffBlobPair ToCDiffRenderer blobs)
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toS output `shouldBe` ("{\"changes\":{\"test/fixtures/toc/ruby/methods.A.rb -> test/fixtures/toc/ruby/methods.X.rb\":[{\"span\":{\"start\":[4,1],\"end\":[5,4]},\"category\":\"Method\",\"term\":\"baz\",\"changeType\":\"removed\"}]},\"errors\":{\"test/fixtures/toc/ruby/methods.A.rb -> test/fixtures/toc/ruby/methods.X.rb\":[{\"span\":{\"start\":[1,1],\"end\":[3,1]},\"error\":\"def bar\\nen\\n\",\"language\":\"Ruby\"}]}}\n" :: ByteString)
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it "summarizes Markdown headings" $ do
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blobs <- blobsForPaths (both "markdown/headings.A.md" "markdown/headings.B.md")
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output <- runTask (diffBlobPair ToCDiffRenderer blobs)
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toS output `shouldBe` ("{\"changes\":{\"test/fixtures/toc/markdown/headings.A.md -> test/fixtures/toc/markdown/headings.B.md\":[{\"span\":{\"start\":[5,1],\"end\":[5,7]},\"category\":\"Heading 2\",\"term\":\"## Two\",\"changeType\":\"added\"},{\"span\":{\"start\":[9,1],\"end\":[10,4]},\"category\":\"Heading 1\",\"term\":\"Final\",\"changeType\":\"added\"}]},\"errors\":{}}\n" :: ByteString)
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type Diff' = SyntaxDiff Text (Maybe Declaration ': DefaultFields)
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type Term' = SyntaxTerm (Maybe Declaration ': DefaultFields)
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numTocSummaries :: Diff' -> Int
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numTocSummaries diff = length $ filter isValidSummary (diffTOC diff)
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-- Return a diff where body is inserted in the expressions of a function. The function is present in both sides of the diff.
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programWithChange :: Term' -> Diff'
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programWithChange body = wrap (pure programInfo :< Indexed [ function' ])
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where
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function' = wrap (pure (Just (FunctionDeclaration "foo") :. functionInfo) :< S.Function name' [] [ inserting body ] )
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name' = wrap (pure (Nothing :. Range 0 0 :. C.Identifier :. sourceSpanBetween (0,0) (0,0) :. Nil) :< Leaf "foo")
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-- Return a diff where term is inserted in the program, below a function found on both sides of the diff.
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programWithChangeOutsideFunction :: Term' -> Diff'
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programWithChangeOutsideFunction term = wrap (pure programInfo :< Indexed [ function', term' ])
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where
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function' = wrap (pure (Just (FunctionDeclaration "foo") :. functionInfo) :< S.Function name' [] [] )
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name' = wrap (pure (Nothing :. Range 0 0 :. C.Identifier :. sourceSpanBetween (0,0) (0,0) :. Nil) :< Leaf "foo")
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term' = inserting term
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programWithInsert :: Text -> Term' -> Diff'
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programWithInsert name body = programOf $ inserting (functionOf name body)
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programWithDelete :: Text -> Term' -> Diff'
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programWithDelete name body = programOf $ deleting (functionOf name body)
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programWithReplace :: Text -> Term' -> Diff'
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programWithReplace name body = programOf $ replacing (functionOf name body) (functionOf (name <> "2") body)
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programOf :: Diff' -> Diff'
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programOf diff = wrap (pure programInfo :< Indexed [ diff ])
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functionOf :: Text -> Term' -> Term'
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functionOf name body = cofree $ (Just (FunctionDeclaration name) :. functionInfo) :< S.Function name' [] [body]
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where
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name' = cofree $ (Nothing :. Range 0 0 :. C.Identifier :. sourceSpanBetween (0,0) (0,0) :. Nil) :< Leaf name
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programInfo :: Record (Maybe Declaration ': DefaultFields)
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programInfo = Nothing :. Range 0 0 :. C.Program :. sourceSpanBetween (0,0) (0,0) :. Nil
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functionInfo :: Record DefaultFields
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functionInfo = Range 0 0 :. C.Function :. sourceSpanBetween (0,0) (0,0) :. Nil
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-- Filter tiers for terms that we consider "meaniningful" in TOC summaries.
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isMeaningfulTerm :: ListableF (Term Syntax) a -> Bool
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isMeaningfulTerm a = case runCofree (unListableF a) of
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(_ :< S.Indexed _) -> False
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(_ :< S.Fixed _) -> False
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(_ :< S.Commented _ _) -> False
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(_ :< S.ParseError _) -> False
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_ -> True
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-- Filter tiers for terms if the Syntax is a Method or a Function.
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isMethodOrFunction :: HasField fields Category => ListableF (Term Syntax) (Record fields) -> Bool
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isMethodOrFunction a = case runCofree (unListableF a) of
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(_ :< S.Method{}) -> True
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(_ :< S.Function{}) -> True
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(a :< _) | getField a == C.Function -> True
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(a :< _) | getField a == C.Method -> True
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(a :< _) | getField a == C.SingletonMethod -> True
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_ -> False
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blobsForPaths :: Both FilePath -> IO (Both Blob)
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blobsForPaths = traverse (readFile . ("test/fixtures/toc/" <>))
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sourceSpanBetween :: (Int, Int) -> (Int, Int) -> Span
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sourceSpanBetween (s1, e1) (s2, e2) = Span (Pos s1 e1) (Pos s2 e2)
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blankDiff :: Diff'
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blankDiff = wrap (pure arrayInfo :< Indexed [ inserting (cofree $ literalInfo :< Leaf "\"a\"") ])
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where
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arrayInfo = Nothing :. Range 0 3 :. ArrayLiteral :. sourceSpanBetween (1, 1) (1, 5) :. Nil
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literalInfo = Nothing :. Range 1 2 :. StringLiteral :. sourceSpanBetween (1, 2) (1, 4) :. Nil
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blankDiffBlobs :: Both Blob
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blankDiffBlobs = both (Blob (fromText "[]") nullOid "a.js" (Just defaultPlainBlob) (Just TypeScript)) (Blob (fromText "[a]") nullOid "b.js" (Just defaultPlainBlob) (Just TypeScript))
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instance Listable Text where
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tiers = unListableText `mapT` tiers
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