105 lines
4.6 KiB
Haskell
105 lines
4.6 KiB
Haskell
{-# LANGUAGE ExplicitForAll #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE QuasiQuotes #-}
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module Language.GraphQL.LexerSpec
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( spec
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) where
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import Data.Either (isRight)
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import Data.Text (Text)
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import Data.Void (Void)
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import Language.GraphQL.Lexer
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import Test.Hspec ( Spec
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, context
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, describe
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, it
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, shouldBe
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, shouldSatisfy
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)
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import Text.Megaparsec ( ParseErrorBundle
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, parse
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)
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import Text.RawString.QQ (r)
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spec :: Spec
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spec = describe "Lexer" $ do
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context "Reference tests" $ do
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it "accepts BOM header" $
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runParser unicodeBOM "\xfeff" `shouldSatisfy` isRight
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it "lexes strings" $ do
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runParser string [r|"simple"|] `shouldBe` Right "simple"
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runParser string [r|" white space "|] `shouldBe` Right " white space "
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runParser string [r|"quote \""|] `shouldBe` Right [r|quote "|]
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runParser string [r|"escaped \n"|] `shouldBe` Right "escaped \n"
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runParser string [r|"slashes \\ \/"|] `shouldBe` Right [r|slashes \ /|]
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runParser string [r|"unicode \u1234\u5678\u90AB\uCDEF"|]
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`shouldBe` Right "unicode ሴ噸邫췯"
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it "lexes block string" $ do
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runParser blockString [r|"""simple"""|] `shouldBe` Right "simple"
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runParser blockString [r|""" white space """|]
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`shouldBe` Right " white space "
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runParser blockString [r|"""contains " quote"""|]
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`shouldBe` Right [r|contains " quote|]
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runParser blockString [r|"""contains \""" triplequote"""|]
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`shouldBe` Right [r|contains """ triplequote|]
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runParser blockString "\"\"\"multi\nline\"\"\"" `shouldBe` Right "multi\nline"
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runParser blockString "\"\"\"multi\rline\r\nnormalized\"\"\""
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`shouldBe` Right "multi\nline\nnormalized"
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runParser blockString "\"\"\"multi\rline\r\nnormalized\"\"\""
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`shouldBe` Right "multi\nline\nnormalized"
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runParser blockString [r|"""unescaped \n\r\b\t\f\u1234"""|]
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`shouldBe` Right [r|unescaped \n\r\b\t\f\u1234|]
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runParser blockString [r|"""slashes \\ \/"""|]
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`shouldBe` Right [r|slashes \\ \/|]
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runParser blockString [r|"""
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spans
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multiple
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lines
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"""|] `shouldBe` Right "spans\n multiple\n lines"
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it "lexes numbers" $ do
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runParser integer "4" `shouldBe` Right (4 :: Int)
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runParser float "4.123" `shouldBe` Right 4.123
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runParser integer "-4" `shouldBe` Right (-4 :: Int)
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runParser integer "9" `shouldBe` Right (9 :: Int)
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runParser integer "0" `shouldBe` Right (0 :: Int)
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runParser float "-4.123" `shouldBe` Right (-4.123)
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runParser float "0.123" `shouldBe` Right 0.123
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runParser float "123e4" `shouldBe` Right 123e4
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runParser float "123E4" `shouldBe` Right 123E4
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runParser float "123e-4" `shouldBe` Right 123e-4
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runParser float "123e+4" `shouldBe` Right 123e+4
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runParser float "-1.123e4" `shouldBe` Right (-1.123e4)
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runParser float "-1.123E4" `shouldBe` Right (-1.123E4)
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runParser float "-1.123e-4" `shouldBe` Right (-1.123e-4)
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runParser float "-1.123e+4" `shouldBe` Right (-1.123e+4)
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runParser float "-1.123e4567" `shouldBe` Right (-1.123e4567)
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it "lexes punctuation" $ do
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runParser bang "!" `shouldBe` Right '!'
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runParser dollar "$" `shouldBe` Right '$'
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runBetween parens "()" `shouldSatisfy` isRight
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runParser spread "..." `shouldBe` Right "..."
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runParser colon ":" `shouldBe` Right ":"
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runParser equals "=" `shouldBe` Right "="
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runParser at "@" `shouldBe` Right '@'
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runBetween brackets "[]" `shouldSatisfy` isRight
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runBetween braces "{}" `shouldSatisfy` isRight
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runParser pipe "|" `shouldBe` Right "|"
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context "Implementation tests" $ do
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it "lexes empty block strings" $
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runParser blockString [r|""""""|] `shouldBe` Right ""
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it "lexes ampersand" $
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runParser amp "&" `shouldBe` Right "&"
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runParser :: forall a. Parser a -> Text -> Either (ParseErrorBundle Text Void) a
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runParser = flip parse ""
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runBetween :: (Parser () -> Parser ()) -> Text -> Either (ParseErrorBundle Text Void) ()
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runBetween parser = parse (parser $ pure ()) ""
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