ae21a8bb2a
The implicitly defined global filter (i.e. all element filtering
functions defined in the global lua environment) is used if no filter is
returned from a lua script. This allows to just write top-level
functions in order to define a lua filter. E.g
function Emph(elem) return pandoc.Strong(elem.content) end
93 lines
3.4 KiB
Haskell
93 lines
3.4 KiB
Haskell
{-# Language OverloadedStrings #-}
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module Tests.Lua ( tests ) where
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import Control.Monad (when)
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import System.FilePath ((</>))
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import Test.Tasty (TestTree)
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import Test.Tasty.HUnit (Assertion, assertEqual, testCase)
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import Test.Tasty.QuickCheck (ioProperty, testProperty)
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import Text.Pandoc.Arbitrary ()
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import Text.Pandoc.Definition (Block, Inline, Meta, Pandoc)
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import Text.Pandoc.Builder ( (<>), bulletList, doc, doubleQuoted, emph
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, linebreak, rawBlock, singleQuoted, para, plain
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, space, str, strong)
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import Text.Pandoc.Lua
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import qualified Scripting.Lua as Lua
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tests :: [TestTree]
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tests =
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[ testProperty "inline elements can be round-tripped through the lua stack" $
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\x -> ioProperty (roundtripEqual (x::Inline))
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, testProperty "block elements can be round-tripped through the lua stack" $
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\x -> ioProperty (roundtripEqual (x::Block))
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, testProperty "meta blocks can be round-tripped through the lua stack" $
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\x -> ioProperty (roundtripEqual (x::Meta))
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, testProperty "documents can be round-tripped through the lua stack" $
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\x -> ioProperty (roundtripEqual (x::Pandoc))
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, testCase "macro expansion via filter" $
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assertFilterConversion "a '{{helloworld}}' string is expanded"
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"strmacro.lua"
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(doc . para $ str "{{helloworld}}")
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(doc . para . emph $ str "Hello, World")
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, testCase "convert all plains to paras" $
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assertFilterConversion "plains become para"
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"plain-to-para.lua"
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(doc $ bulletList [plain (str "alfa"), plain (str "bravo")])
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(doc $ bulletList [para (str "alfa"), para (str "bravo")])
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, testCase "make hello world document" $
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assertFilterConversion "Document contains 'Hello, World!'"
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"hello-world-doc.lua"
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(doc . para $ str "Hey!" <> linebreak <> str "What's up?")
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(doc . para $ str "Hello," <> space <> str "World!")
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, testCase "implicit doc filter" $
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assertFilterConversion "Document contains 'Hello, World!'"
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"implicit-doc-filter.lua"
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(doc . plain $ linebreak)
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(doc . para $ str "Hello," <> space <> str "World!")
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, testCase "parse raw markdown blocks" $
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assertFilterConversion "raw markdown block is converted"
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"markdown-reader.lua"
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(doc $ rawBlock "markdown" "*charly* **delta**")
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(doc . para $ emph "charly" <> space <> strong "delta")
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, testCase "allow shorthand functions for quote types" $
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assertFilterConversion "single quoted becomes double quoted string"
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"single-to-double-quoted.lua"
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(doc . para . singleQuoted $ str "simple")
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(doc . para . doubleQuoted $ str "simple")
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]
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assertFilterConversion :: String -> FilePath -> Pandoc -> Pandoc -> Assertion
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assertFilterConversion msg filterPath docIn docExpected = do
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docRes <- runLuaFilter ("lua" </> filterPath) [] docIn
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assertEqual msg docExpected docRes
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roundtripEqual :: (Eq a, Lua.StackValue a) => a -> IO Bool
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roundtripEqual x = (x ==) <$> roundtripped
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where
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roundtripped :: (Lua.StackValue a) => IO a
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roundtripped = do
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lua <- Lua.newstate
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Lua.openlibs lua
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pushPandocModule lua
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Lua.setglobal lua "pandoc"
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oldSize <- Lua.gettop lua
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Lua.push lua x
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size <- Lua.gettop lua
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when ((size - oldSize) /= 1) $
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error ("not exactly one additional element on the stack: " ++ show size)
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res <- Lua.peek lua (-1)
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retval <- case res of
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Nothing -> error "could not read from stack"
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Just y -> return y
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Lua.close lua
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return retval
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