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https://github.com/github/semantic.git
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250 lines
14 KiB
Haskell
250 lines
14 KiB
Haskell
{-# LANGUAGE DataKinds, MonoLocalBinds, TypeOperators #-}
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module Rendering.TOC.Spec (spec) where
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import Analysis.Declaration
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import Data.Aeson
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import Data.Align.Generic
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import Data.Bifunctor
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import Data.Bifunctor.Join
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import Data.Diff
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import Data.Functor.Classes
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import Data.Patch
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import Data.Range
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import Data.Record
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import Data.Span
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import Data.Sum
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import Data.Term
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import Data.Text (Text)
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import Data.Text.Encoding (encodeUtf8)
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import Data.Union
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import Diffing.Algorithm
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import Diffing.Interpreter
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import Prelude
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import qualified Data.Syntax as Syntax
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import qualified Data.Syntax.Declaration as Declaration
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import Rendering.TOC
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import SpecHelpers
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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 ()) (diff :: Diff ListableSyntax () ()) `shouldBe` []
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prop "produces no entries for identity diffs" $
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\ term -> tableOfContentsBy (Just . termFAnnotation) (diffTerms term (term :: Term ListableSyntax (Record '[Range, Span]))) `shouldBe` []
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prop "produces inserted/deleted/replaced entries for relevant nodes within patches" $
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\ p -> tableOfContentsBy (Just . termFAnnotation) (patch deleting inserting replacing p)
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`shouldBe`
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patch (fmap Deleted) (fmap Inserted) (\ as bs -> Replaced (head bs) : fmap Deleted (tail as) <> fmap Inserted (tail bs)) (bimap (foldMap pure) (foldMap pure) (p :: Patch (Term ListableSyntax Int) (Term ListableSyntax Int)))
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prop "produces changed entries for relevant nodes containing irrelevant patches" $
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\ diff -> do
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let diff' = merge (True, True) (injectSum [bimap (const False) (const False) (diff :: Diff ListableSyntax Bool Bool)])
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let toc = tableOfContentsBy (\ (n `In` _) -> if n then Just n else Nothing) diff'
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toc `shouldBe` if null (diffPatches diff') then []
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else [Changed True]
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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/toc/methods.A.rb" "ruby/toc/methods.B.rb")
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diff <- runTask $ diffWithParser rubyParser sourceBlobs
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diffTOC diff `shouldBe`
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[ TOCSummary "Method" "self.foo" (Span (Pos 1 1) (Pos 2 4)) "added"
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, TOCSummary "Method" "bar" (Span (Pos 4 1) (Pos 6 4)) "modified"
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, TOCSummary "Method" "baz" (Span (Pos 4 1) (Pos 5 4)) "removed"
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]
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it "summarizes changed classes" $ do
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sourceBlobs <- blobsForPaths (both "ruby/toc/classes.A.rb" "ruby/toc/classes.B.rb")
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diff <- runTask $ diffWithParser rubyParser sourceBlobs
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diffTOC diff `shouldBe`
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[ TOCSummary "Class" "Baz" (Span (Pos 1 1) (Pos 2 4)) "removed"
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, TOCSummary "Class" "Foo" (Span (Pos 1 1) (Pos 3 4)) "modified"
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, TOCSummary "Class" "Bar" (Span (Pos 5 1) (Pos 6 4)) "added"
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]
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it "dedupes changes in same parent method" $ do
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sourceBlobs <- blobsForPaths (both "javascript/toc/duplicate-parent.A.js" "javascript/toc/duplicate-parent.B.js")
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diff <- runTask $ diffWithParser typescriptParser sourceBlobs
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diffTOC diff `shouldBe`
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[ TOCSummary "Function" "myFunction" (Span (Pos 1 1) (Pos 6 2)) "modified" ]
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it "dedupes similar methods" $ do
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sourceBlobs <- blobsForPaths (both "javascript/toc/erroneous-duplicate-method.A.js" "javascript/toc/erroneous-duplicate-method.B.js")
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diff <- runTask $ diffWithParser typescriptParser sourceBlobs
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diffTOC diff `shouldBe`
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[ TOCSummary "Function" "performHealthCheck" (Span (Pos 8 1) (Pos 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/toc/method-with-receiver.A.go" "go/toc/method-with-receiver.B.go")
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diff <- runTask $ diffWithParser goParser sourceBlobs
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diffTOC diff `shouldBe`
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[ TOCSummary "Method" "(*apiClient) CheckAuth" (Span (Pos 3 1) (Pos 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/toc/method-starts-with-two-identifiers.A.rb" "ruby/toc/method-starts-with-two-identifiers.B.rb")
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diff <- runTask $ diffWithParser rubyParser sourceBlobs
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diffTOC diff `shouldBe`
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[ TOCSummary "Method" "foo" (Span (Pos 1 1) (Pos 4 4)) "modified" ]
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it "handles unicode characters in file" $ do
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sourceBlobs <- blobsForPaths (both "ruby/toc/unicode.A.rb" "ruby/toc/unicode.B.rb")
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diff <- runTask $ diffWithParser rubyParser sourceBlobs
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diffTOC diff `shouldBe`
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[ TOCSummary "Method" "foo" (Span (Pos 6 1) (Pos 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/toc/starts-with-newline.js" "javascript/toc/starts-with-newline.js")
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diff <- runTask $ diffWithParser rubyParser sourceBlobs
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diffTOC diff `shouldBe` []
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prop "inserts of methods and functions are summarized" . forAll ((not . isMethodOrFunction . Prelude.snd) `filterT` tiers) $
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\(name, body) ->
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let diff = programWithInsert name body
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in numTocSummaries diff `shouldBe` 1
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prop "deletes of methods and functions are summarized" . forAll ((not . isMethodOrFunction . Prelude.snd) `filterT` tiers) $
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\(name, body) ->
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let diff = programWithDelete name body
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in numTocSummaries diff `shouldBe` 1
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prop "replacements of methods and functions are summarized" . forAll ((not . isMethodOrFunction . Prelude.snd) `filterT` tiers) $
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\(name, body) ->
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let diff = programWithReplace name body
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in numTocSummaries diff `shouldBe` 1
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prop "changes inside methods and functions are summarizied" . forAll (((&&) <$> not . isMethodOrFunction <*> isMeaningfulTerm) `filterT` tiers) $
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\body ->
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let diff = programWithChange 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 body
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in numTocSummaries diff `shouldBe` 0
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prop "unchanged diffs aren’t summarized" $
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\term -> diffTOC (diffTerms term (term :: Term')) `shouldBe` []
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describe "TOCSummary" $ do
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it "encodes modified summaries to JSON" $ do
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let summary = TOCSummary "Method" "foo" (Span (Pos 1 1) (Pos 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 = TOCSummary "Method" "self.foo" (Span (Pos 1 1) (Pos 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/toc/methods.A.rb" "ruby/toc/methods.B.rb")
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output <- runTask (runDiff ToCDiffRenderer [blobs])
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runBuilder output `shouldBe` ("{\"changes\":{\"test/fixtures/ruby/toc/methods.A.rb -> test/fixtures/ruby/toc/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/toc/methods.A.rb" "ruby/toc/methods.X.rb")
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output <- runTask (runDiff ToCDiffRenderer [blobs])
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runBuilder output `shouldBe` ("{\"changes\":{\"test/fixtures/ruby/toc/methods.A.rb -> test/fixtures/ruby/toc/methods.X.rb\":[{\"span\":{\"start\":[1,1],\"end\":[2,4]},\"category\":\"Method\",\"term\":\"bar\",\"changeType\":\"removed\"},{\"span\":{\"start\":[4,1],\"end\":[5,4]},\"category\":\"Method\",\"term\":\"baz\",\"changeType\":\"removed\"}]},\"errors\":{\"test/fixtures/ruby/toc/methods.A.rb -> test/fixtures/ruby/toc/methods.X.rb\":[{\"span\":{\"start\":[1,1],\"end\":[3,1]},\"error\":\"expected end of input nodes, but got ParseError\",\"language\":\"Ruby\"}]}}\n" :: ByteString)
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it "ignores anonymous functions" $ do
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blobs <- blobsForPaths (both "ruby/toc/lambda.A.rb" "ruby/toc/lambda.B.rb")
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output <- runTask (runDiff ToCDiffRenderer [blobs])
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runBuilder output `shouldBe` ("{\"changes\":{},\"errors\":{}}\n" :: ByteString)
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it "summarizes Markdown headings" $ do
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blobs <- blobsForPaths (both "markdown/toc/headings.A.md" "markdown/toc/headings.B.md")
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output <- runTask (runDiff ToCDiffRenderer [blobs])
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runBuilder output `shouldBe` ("{\"changes\":{\"test/fixtures/markdown/toc/headings.A.md -> test/fixtures/markdown/toc/headings.B.md\":[{\"span\":{\"start\":[1,1],\"end\":[3,16]},\"category\":\"Heading 1\",\"term\":\"Introduction\",\"changeType\":\"removed\"},{\"span\":{\"start\":[5,1],\"end\":[7,4]},\"category\":\"Heading 2\",\"term\":\"Two\",\"changeType\":\"modified\"},{\"span\":{\"start\":[9,1],\"end\":[11,10]},\"category\":\"Heading 3\",\"term\":\"This heading is new\",\"changeType\":\"added\"},{\"span\":{\"start\":[13,1],\"end\":[14,4]},\"category\":\"Heading 1\",\"term\":\"Final\",\"changeType\":\"added\"}]},\"errors\":{}}\n" :: ByteString)
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type Diff' = Diff ListableSyntax (Record '[Maybe Declaration, Range, Span]) (Record '[Maybe Declaration, Range, Span])
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type Term' = Term ListableSyntax (Record '[Maybe Declaration, Range, Span])
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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 = merge (programInfo, programInfo) (injectSum [ function' ])
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where
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function' = merge (Just (FunctionDeclaration "foo" mempty Nothing) :. emptyInfo, Just (FunctionDeclaration "foo" mempty Nothing) :. emptyInfo) (injectSum (Declaration.Function [] name' [] (merge (Nothing :. emptyInfo, Nothing :. emptyInfo) (injectSum [ inserting body ]))))
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name' = let info = Nothing :. emptyInfo in merge (info, info) (injectSum (Syntax.Identifier (name "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 = merge (programInfo, programInfo) (injectSum [ function', term' ])
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where
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function' = merge (Just (FunctionDeclaration "foo" mempty Nothing) :. emptyInfo, Just (FunctionDeclaration "foo" mempty Nothing) :. emptyInfo) (injectSum (Declaration.Function [] name' [] (merge (Nothing :. emptyInfo, Nothing :. emptyInfo) (injectSum []))))
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name' = let info = Nothing :. emptyInfo in merge (info, info) (injectSum (Syntax.Identifier (name "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 = merge (programInfo, programInfo) (injectSum [ diff ])
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functionOf :: Text -> Term' -> Term'
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functionOf n body = termIn (Just (FunctionDeclaration n mempty Nothing) :. emptyInfo) (injectSum (Declaration.Function [] name' [] (termIn (Nothing :. emptyInfo) (injectSum [body]))))
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where
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name' = termIn (Nothing :. emptyInfo) (injectSum (Syntax.Identifier (name (encodeUtf8 n))))
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programInfo :: Record '[Maybe Declaration, Range, Span]
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programInfo = Nothing :. emptyInfo
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emptyInfo :: Record '[Range, Span]
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emptyInfo = Range 0 0 :. Span (Pos 0 0) (Pos 0 0) :. Nil
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-- Filter tiers for terms that we consider "meaniningful" in TOC summaries.
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isMeaningfulTerm :: Term ListableSyntax a -> Bool
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isMeaningfulTerm a
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| Just (_:_) <- projectSum (termOut a) = False
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| Just [] <- projectSum (termOut a) = False
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| otherwise = True
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-- Filter tiers for terms if the Syntax is a Method or a Function.
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isMethodOrFunction :: Term' -> Bool
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isMethodOrFunction a
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| Just Declaration.Method{} <- projectSum (termOut a) = True
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| Just Declaration.Function{} <- projectSum (termOut a) = True
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| any isJust (foldMap ((:[]) . rhead) a) = True
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| otherwise = False
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blobsForPaths :: Both FilePath -> IO BlobPair
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blobsForPaths = readFilePair . fmap ("test/fixtures" </>)
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blankDiff :: Diff'
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blankDiff = merge (arrayInfo, arrayInfo) (injectSum [ inserting (termIn literalInfo (injectSum (Syntax.Identifier (name "\"a\"")))) ])
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where
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arrayInfo = Nothing :. Range 0 3 :. Span (Pos 1 1) (Pos 1 5) :. Nil
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literalInfo = Nothing :. Range 1 2 :. Span (Pos 1 2) (Pos 1 4) :. Nil
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-- Diff helpers
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diffWithParser :: ( HasField fields Data.Span.Span
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, HasField fields Range
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, Eq1 syntax
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, Show1 syntax
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, Traversable syntax
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, Diffable syntax
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, GAlign syntax
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, HasDeclaration syntax
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, Members '[Distribute WrappedTask, Task] effs
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)
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=> Parser (Term syntax (Record fields))
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-> BlobPair
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-> Eff effs (Diff syntax (Record (Maybe Declaration ': fields)) (Record (Maybe Declaration ': fields)))
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diffWithParser parser blobs = distributeFor blobs (\ blob -> WrapTask $ parse parser blob >>= decorate (declarationAlgebra blob)) >>= SpecHelpers.diff . runJoin
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