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module Haddock.Backends.Hyperlinker.ParserSpec (main, spec) where
import Test.Hspec
import Test.QuickCheck
import Haddock.Backends.Hyperlinker.Parser
main :: IO ()
main = hspec spec
spec :: Spec
spec = do
describe "parse" parseSpec
parseSpec :: Spec
parseSpec = do
it "is total" $
property $ \src -> length (parse src) `shouldSatisfy` (>= 0)
it "retains file layout" $
property $ \src -> concatMap tkValue (parse src) == src
context "when parsing single-line comments" $ do
it "should ignore content until the end of line" $
"-- some very simple comment\nidentifier"
`shouldParseTo`
[TkComment, TkSpace, TkIdentifier]
it "should allow endline escaping" $
"-- first line\\\nsecond line\\\nand another one"
`shouldParseTo`
[TkComment]
context "when parsing multi-line comments" $ do
it "should support nested comments" $
"{- comment {- nested -} still comment -} {- next comment -}"
`shouldParseTo`
[TkComment, TkSpace, TkComment]
it "should distinguish compiler pragma" $
"{- comment -}{-# LANGUAGE GADTs #-}{- comment -}"
`shouldParseTo`
[TkComment, TkPragma, TkComment]
it "should recognize preprocessor directives" $ do
"\n#define foo bar" `shouldParseTo` [TkSpace, TkCpp]
"x # y" `shouldParseTo`
[TkIdentifier, TkSpace, TkCpp, TkSpace,TkIdentifier]
it "should distinguish basic language constructs" $ do
"(* 2) <$> (\"abc\", foo)" `shouldParseTo`
[ TkSpecial, TkOperator, TkSpace, TkNumber, TkSpecial
, TkSpace, TkOperator, TkSpace
, TkSpecial, TkString, TkSpecial, TkSpace, TkIdentifier, TkSpecial
]
"let foo' = foo in foo' + foo'" `shouldParseTo`
[ TkKeyword, TkSpace, TkIdentifier
, TkSpace, TkGlyph, TkSpace
, TkIdentifier, TkSpace, TkKeyword, TkSpace
, TkIdentifier, TkSpace, TkOperator, TkSpace, TkIdentifier
]
"square x = y^2 where y = x" `shouldParseTo`
[ TkIdentifier, TkSpace, TkIdentifier
, TkSpace, TkGlyph, TkSpace
, TkIdentifier, TkOperator, TkNumber
, TkSpace, TkKeyword, TkSpace
, TkIdentifier, TkSpace, TkGlyph, TkSpace, TkIdentifier
]
it "should parse do-notation syntax" $ do
"do { foo <- getLine; putStrLn foo }" `shouldParseTo`
[ TkKeyword, TkSpace, TkSpecial, TkSpace
, TkIdentifier, TkSpace, TkGlyph, TkSpace
, TkIdentifier, TkSpecial, TkSpace
, TkIdentifier, TkSpace, TkIdentifier, TkSpace, TkSpecial
]
unlines
[ "do"
, " foo <- getLine"
, " putStrLn foo"
] `shouldParseTo`
[ TkKeyword, TkSpace, TkIdentifier
, TkSpace, TkGlyph, TkSpace, TkIdentifier, TkSpace
, TkIdentifier, TkSpace, TkIdentifier, TkSpace
]
shouldParseTo :: String -> [TokenType] -> Expectation
str `shouldParseTo` tokens = map tkType (parse str) `shouldBe` tokens
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