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semantic/test/Data/Syntax/Assignment/Spec.hs

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{-# LANGUAGE DataKinds #-}
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module Data.Syntax.Assignment.Spec where
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import Data.ByteString.Char8 as B (words, length)
import Data.Record
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import Data.Syntax.Assignment
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import Info
import Prologue
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import Source hiding (source, length)
import Test.Hspec
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import Text.Parser.TreeSitter.Language (Symbol(..), SymbolType(..))
spec :: Spec
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spec = do
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describe "Applicative" $ do
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it "matches in sequence" $
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runAssignment ((,) <$> red <*> red) (makeState "helloworld" [Rose (rec Red 0 5) [], Rose (rec Red 5 10) []]) `shouldBe` Result [] (Just (AssignmentState 10 (Info.SourcePos 1 11) "" [], (Out "hello", Out "world")))
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describe "Alternative" $ do
it "attempts multiple alternatives" $
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runAssignment (green <|> red) (makeState "hello" [Rose (rec Red 0 5) []]) `shouldBe` Result [] (Just (AssignmentState 5 (Info.SourcePos 1 6) "" [], Out "hello"))
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it "matches repetitions" $
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let s = "colourless green ideas sleep furiously"
w = words s
(_, nodes) = foldl (\ (i, prev) word -> (i + B.length word + 1, prev <> [Rose (rec Red i (i + B.length word)) []])) (0, []) w in
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resultValue (runAssignment (many red) (makeState (Source s) nodes)) `shouldBe` Just (AssignmentState (B.length s) (Info.SourcePos 1 (succ (B.length s))) "" [], Out <$> w)
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it "matches one-or-more repetitions against one or more input nodes" $
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resultValue (runAssignment (some red) (makeState "hello" [Rose (rec Red 0 5) []])) `shouldBe` Just (AssignmentState 5 (Info.SourcePos 1 6) "" [], [Out "hello"])
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describe "symbol" $ do
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it "matches nodes with the same symbol" $
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snd <$> runAssignment red (makeState "hello" [Rose (rec Red 0 5) []]) `shouldBe` Result [] (Just (Out "hello"))
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it "does not advance past the current node" $
let initialState = makeState "hi" [ Rose (rec Red 0 2) [] ] in
fst <$> runAssignment (symbol Red) initialState `shouldBe` Result [] (Just initialState)
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describe "source" $ do
it "produces the nodes source" $
assign source "hi" (Rose (rec Red 0 2) []) `shouldBe` Result [] (Just "hi")
it "advances past the current node" $
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fst <$> runAssignment source (makeState "hi" [ Rose (rec Red 0 2) [] ]) `shouldBe` Result [] (Just (AssignmentState 2 (Info.SourcePos 1 3) "" []))
describe "children" $ do
it "advances past the current node" $
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fst <$> runAssignment (children (pure (Out ""))) (makeState "a" [Rose (rec Red 0 1) []]) `shouldBe` Result [] (Just (AssignmentState 1 (Info.SourcePos 1 2) "" []))
it "matches if its subrule matches" $
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() <$ runAssignment (children red) (makeState "a" [Rose (rec Blue 0 1) [Rose (rec Red 0 1) []]]) `shouldBe` Result [] (Just ())
it "does not match if its subrule does not match" $
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(runAssignment (children red) (makeState "a" [Rose (rec Blue 0 1) [Rose (rec Green 0 1) []]])) `shouldBe` Result [ Error (Info.SourcePos 1 1) [Red] (Just Green) ] Nothing
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it "matches nested children" $ do
runAssignment
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(symbol Red *> children (symbol Green *> children (symbol Blue *> source)))
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(makeState "1" [ Rose (rec Red 0 1) [ Rose (rec Green 0 1) [ Rose (rec Blue 0 1) [] ] ] ])
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`shouldBe`
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Result [] (Just (AssignmentState 1 (Info.SourcePos 1 2) "" [], "1"))
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it "continues after children" $ do
resultValue (runAssignment
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(many (symbol Red *> children (symbol Green *> source)
<|> symbol Blue *> source))
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(makeState "BC" [ Rose (rec Red 0 1) [ Rose (rec Green 0 1) [] ]
, Rose (rec Blue 1 2) [] ]))
`shouldBe`
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Just (AssignmentState 2 (Info.SourcePos 1 3) "" [], ["B", "C"])
it "matches multiple nested children" $ do
runAssignment
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(symbol Red *> children (many (symbol Green *> children (symbol Blue *> source))))
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(makeState "12" [ Rose (rec Red 0 2) [ Rose (rec Green 0 1) [ Rose (rec Blue 0 1) [] ]
, Rose (rec Green 1 2) [ Rose (rec Blue 1 2) [] ] ] ])
`shouldBe`
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Result [] (Just (AssignmentState 2 (Info.SourcePos 1 3) "" [], ["1", "2"]))
describe "runAssignment" $ do
it "drops anonymous nodes before matching" $
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runAssignment red (makeState "magenta red" [Rose (rec Magenta 0 7) [], Rose (rec Red 8 11) []]) `shouldBe` Result [] (Just (AssignmentState 11 (Info.SourcePos 1 12) "" [], Out "red"))
it "does not drop anonymous nodes after matching" $
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runAssignment red (makeState "red magenta" [Rose (rec Red 0 3) [], Rose (rec Magenta 4 11) []]) `shouldBe` Result [] (Just (AssignmentState 3 (Info.SourcePos 1 4) " magenta" [Rose (rec Magenta 4 11) []], Out "red"))
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it "does not drop anonymous nodes when requested" $
runAssignment ((,) <$> magenta <*> red) (makeState "magenta red" [Rose (rec Magenta 0 7) [], Rose (rec Red 8 11) []]) `shouldBe` Result [] (Just (AssignmentState 11 (Info.SourcePos 1 12) "" [], (Out "magenta", Out "red")))
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rec :: symbol -> Int -> Int -> Record '[symbol, Range, SourceSpan]
rec symbol start end = symbol :. Range start end :. Info.SourceSpan (Info.SourcePos 1 (succ start)) (Info.SourcePos 1 (succ end)) :. Nil
data Grammar = Red | Green | Blue | Magenta
deriving (Enum, Eq, Show)
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instance Symbol Grammar where
symbolType Magenta = Anonymous
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symbolType _ = Regular
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data Out = Out ByteString
deriving (Eq, Show)
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red :: Assignment (Node Grammar) Out
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red = Out <$ symbol Red <*> source
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green :: Assignment (Node Grammar) Out
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green = Out <$ symbol Green <*> source
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blue :: Assignment (Node Grammar) Out
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blue = Out <$ symbol Blue <*> source
magenta :: Assignment (Node Grammar) Out
magenta = Out <$ symbol Magenta <*> source