{-# LANGUAGE OverloadedStrings #-}
module Tests.Writers.HTML (tests) where

import Data.Text (unpack)
import Test.Tasty
import Tests.Helpers
import Text.Pandoc
import Text.Pandoc.Arbitrary ()
import Text.Pandoc.Builder

html :: (ToPandoc a) => a -> String
html = unpack . purely (writeHtml4String def{ writerWrapText = WrapNone }) . toPandoc

htmlQTags :: (ToPandoc a) => a -> String
htmlQTags = unpack
  . purely (writeHtml4String def{ writerWrapText = WrapNone, writerHtmlQTags = True })
  . toPandoc

{-
  "my test" =: X =?> Y

is shorthand for

  test html "my test" $ X =?> Y

which is in turn shorthand for

  test html "my test" (X,Y)
-}

infix 4 =:
(=:) :: (ToString a, ToPandoc a)
     => String -> (a, String) -> TestTree
(=:) = test html

tests :: [TestTree]
tests =
  [ testGroup "inline code"
    [ "basic" =: code "@&" =?> "<code>@&amp;</code>"
    , "haskell" =: codeWith ("",["haskell"],[]) ">>="
      =?> "<code class=\"sourceCode haskell\"><span class=\"op\">&gt;&gt;=</span></code>"
    , "nolanguage" =: codeWith ("",["nolanguage"],[]) ">>="
      =?> "<code class=\"nolanguage\">&gt;&gt;=</code>"
    ]
  , testGroup "images"
    [ "alt with formatting" =:
      image "/url" "title" ("my " <> emph "image")
      =?> "<img src=\"/url\" title=\"title\" alt=\"my image\" />"
    ]
  , testGroup "blocks"
    [ "definition list with empty <dt>" =:
      definitionList [(mempty, [para $ text "foo bar"])]
      =?> "<dl><dt></dt><dd><p>foo bar</p></dd></dl>"
    , "heading with disallowed attributes" =:
      headerWith ("", [], [("invalid","1"), ("lang", "en")]) 1 "test"
      =?>
      "<h1 lang=\"en\">test</h1>"
    ]
  , testGroup "quotes"
    [ "quote with cite attribute (without q-tags)" =:
      doubleQuoted (spanWith ("", [], [("cite", "http://example.org")]) (str "examples"))
      =?> "“<span cite=\"http://example.org\">examples</span>”"
    , tQ "quote with cite attribute (with q-tags)" $
      doubleQuoted (spanWith ("", [], [("cite", "http://example.org")]) (str "examples"))
      =?> "<q cite=\"http://example.org\">examples</q>"
    ]
  , testGroup "sample"
    [ "sample should be rendered correctly" =:
      plain (codeWith ("",["sample"],[]) "Answer is 42") =?>
      "<samp>Answer is 42</samp>"
    ]
  , testGroup "variable"
    [ "variable should be rendered correctly" =:
      plain (codeWith ("",["variable"],[]) "result") =?>
      "<var>result</var>"
    ]
  , testGroup "sample with style"
    [ "samp should wrap highlighted code" =:
      codeWith ("",["sample","haskell"],[]) ">>="
      =?> ("<samp><code class=\"sourceCode haskell\">" ++
          "<span class=\"op\">&gt;&gt;=</span></code></samp>")
    ]
  , testGroup "variable with style"
    [ "var should wrap highlighted code" =:
      codeWith ("",["haskell","variable"],[]) ">>="
      =?> ("<var><code class=\"sourceCode haskell\">" ++
          "<span class=\"op\">&gt;&gt;=</span></code></var>")
    ]
  ]
  where
    tQ :: (ToString a, ToPandoc a)
         => String -> (a, String) -> TestTree
    tQ = test htmlQTags