test/HUnit.hs

   1 {-# LANGUAGE OverloadedStrings #-}
   2 module HUnit where
   3
   4 import Test.Tasty
   5 import Test.Tasty.HUnit
   6
   7 import Data.Foldable (Foldable(..))
   8 import Data.Function (($), (.))
   9 import Data.Functor ((<$>))
  10 import Data.Int (Int)
  11 import Data.Maybe (Maybe(..))
  12 import Data.Monoid (Monoid(..))
  13 import Data.Ord (Ord(..))
  14 import Data.Semigroup (Semigroup(..))
  15 import Data.String (String, IsString(..))
  16 import Prelude ((+))
  17 import Text.Show (Show(..))
  18 import qualified Data.List as List
  19
  20 import Symantic.Document.API
  21 import Symantic.Document.Plain
  22 import Symantic.Document.AnsiText
  23
  24 -- * Tests
  25 hunits :: TestTree
  26 hunits = testGroup "HUnit" $
  27  [ hunitPlain
  28  ]
  29
  30 hunitPlain :: TestTree
  31 hunitPlain = testList "Plain"
  32  [ newline ==> "\n"
  33  , "hello\nworld" ==> "hello\nworld"
  34  , 10`maxWidth` breakpoints ["hello", "world"] ==> "helloworld"
  35  ,  9`maxWidth` breakpoints ["hello", "world"] ==> "hello\nworld"
  36  ,  6`maxWidth` breakpoints ["he", "ll", "o!"] ==> "hello!"
  37  ,  6`maxWidth` breakpoints ["he", "ll", "o!", "wo", "rl", "d!"] ==> "hello!\nworld!"
  38  ,  5`maxWidth` breakpoints ["hello", "world"] ==> "hello\nworld"
  39  ,  5`maxWidth` breakpoints ["he", "llo", "world"] ==> "hello\nworld"
  40  ,  5`maxWidth` breakpoints ["he", "ll", "o!"] ==> "hell\no!"
  41  ,  4`maxWidth` breakpoints ["hello", "world"] ==> "hello\nworld"
  42  ,  4`maxWidth` breakpoints ["he", "ll", "o!"] ==> "hell\no!"
  43  ,  4`maxWidth` breakpoints ["he", "llo", "world"] ==> "he\nllo\nworld"
  44  ,  4`maxWidth` breakpoints ["he", "llo", "w", "orld"] ==> "he\nllow\norld"
  45  ,  4`maxWidth` breakpoints ["he", "ll", "o!", "wo", "rl", "d!"] ==> "hell\no!wo\nrld!"
  46  ,  3`maxWidth` breakpoints ["hello", "world"] ==> "hello\nworld"
  47  ,  3`maxWidth` breakpoints ["he", "ll"] ==> "he\nll"
  48  ,  3`maxWidth` breakpoints ["he", "ll", "o!"] ==> "he\nll\no!"
  49  ,  1`maxWidth` breakpoints ["he", "ll", "o!"] ==> "he\nll\no!"
  50  ,  4`maxWidth` mconcat ["__", align $ breakpoints ["he", "ll", "o!", "wo", "rl", "d!"]]
  51     ==> "__he\n  ll\n  o!\n  wo\n  rl\n  d!"
  52  ,  6`maxWidth` mconcat ["__", align $ breakpoints ["he", "ll", "o!", "wo", "rl", "d!"]]
  53     ==> "__hell\n  o!wo\n  rld!"
  54  , 16`maxWidth` mconcat ["__", listHorV ["hello", "world"]] ==> "__[hello, world]"
  55  ,  4`maxWidth` mconcat ["__", listHorV ["hello", "world"]] ==> "__[ hello\n  , world\n  ]"
  56  , 11`maxWidth` breakspaces ["hello", "world"] ==> "hello world"
  57  , 10`maxWidth` breakspaces ["hello", "world"] ==> "hello\nworld"
  58  ,  6`maxWidth` breakspaces ["hel", "lo", "wo", "rld"] ==> "hel lo\nwo rld"
  59  ,  6`maxWidth` breakspaces ["hel", "lo", "wo", "rld", "HEL", "LO", "WO", "RLD"] ==> "hel lo\nwo rld\nHEL LO\nWO RLD"
  60  ,  5`maxWidth` breakspaces ["hello", "world"] ==> "hello\nworld"
  61  , 19`maxWidth` fun (fun $ fun $ fun $ fun $ listHorV ["abcdefg", "abcdefg"])
  62    ==> "function(function(\n    function(\n      function(\n        function(\n          [ abcdefg\n          , abcdefg\n          ]\n          )\n        )\n      )\n    ))"
  63  , 19`maxWidth` fun (fun $ fun $ fun $ fun $ listHorV ["abcdefgh", "abcdefgh"])
  64    ==> "function(\n  function(\n    function(\n      function(\n        function(\n          [ abcdefgh\n          , abcdefgh\n          ]\n          )\n        )\n      )\n    )\n  )"
  65  , 7`maxWidth` ("hello"<>breakspace<>"world") ==> "hello\nworld"
  66  , 7`maxWidth` ("hello "<>"world") ==> "hello\nworld"
  67  , "  "<> "hello\nworld\n!" ==> "  hello\nworld\n!"
  68  , "__"<>align "hello\nworld\n!" ==> "__hello\n  world\n  !"
  69  , hang 2 "hello\nworld\n!" ==> "hello\n  world\n  !"
  70  , hang 2 "hello\nworld\n!"<>"\nhello\n!" ==> "hello\n  world\n  !\nhello\n!"
  71  , "let " <> align (catV $
  72              (\(name, typ) -> fill 6 name <+> "::" <+> typ)
  73              <$> [ ("abcdef","Doc")
  74                  , ("abcde","Int -> Doc -> Doc")
  75                  , ("abcdefghi","Doc") ])
  76    ==> "let abcdef :: Doc\n    abcde  :: Int -> Doc -> Doc\n    abcdefghi :: Doc"
  77  , "let " <> align (catV $
  78              (\(name, typ) -> breakfill 6 name <> " ::" <+> typ)
  79              <$> [ ("abcdef","Doc")
  80                  , ("abcde","Int -> Doc -> Doc")
  81                  , ("abcdefghi","Doc") ])
  82    ==> "let abcdef :: Doc\n    abcde  :: Int -> Doc -> Doc\n    abcdefghi\n           :: Doc"
  83  , "let " <> align (catV $
  84              (\(name, typ) -> breakfill 6 name <> " ::" <+> typ)
  85              <$> [("abcdefghi","Doc ->\nDoc")])
  86    ==> "let abcdefghi\n           :: Doc ->\n    Doc"
  87  , "let " <> align (catV $
  88              (\(name, typ) -> breakfill 6 name <> align (" ::" <+> typ))
  89              <$> [("abcdefghi","Doc ->\nDoc")])
  90    ==> "let abcdefghi\n           :: Doc ->\n          Doc"
  91  , 10 `maxWidth` "1 2 3 4 5 6 7 8 9 10 11 12 13 14 15" ==> "1 2 3 4 5\n6 7 8 9 10\n11 12 13\n14 15"
  92  , 10 `maxWidth` "a b "<>"12"<>align (" 34 5")                 ==> "a b 12 34\n      5"
  93  , 10 `maxWidth` "a b "<>"12"<>align (" 34" <> align "")       ==> "a b 12 34"
  94  , 10 `maxWidth` "a b "<>"12"<>align (" 34" <> align " ")      ==> "a b 12 34 "
  95  , 10 `maxWidth` "a b "<>"12"<>align (" 34" <> align " 5")     ==> "a b 12 34\n         5"
  96  , 10 `maxWidth` "a b "<>"12"<>align (" 34" <> align " 56")    ==> "a b 12\n      34\n        56"
  97  , 10 `maxWidth` "a b "<>"12"<>align (" 34" <> align " 567")   ==> "a b\n12 34 567"
  98  , 10 `maxWidth` "a b "<>"12"<>align (" 34" <> align " 5678")  ==> "a b\n12 34 5678"
  99  , 10 `maxWidth` "a b "<>"12"<>align (" 34" <> align " 56789") ==> "a b\n12 34\n     56789"
 100  , 10 `maxWidth` ("1234567890" <> " ") <> "1" ==> "1234567890\n1"
 101  , 10 `maxWidth` nestedAlign  6 ==> "1 2 3 4 5\n         6"
 102  , 10 `maxWidth` nestedAlign  7 ==> "1 2 3 4\n       5\n        6\n         7"
 103  , 10 `maxWidth` nestedAlign  8 ==> "1 2 3\n     4\n      5\n       6\n        7\n         8"
 104  , 10 `maxWidth` nestedAlign  9 ==> "1 2\n   3\n    4\n     5\n      6\n       7\n        8\n         9"
 105  , 10 `maxWidth` nestedAlign 10 ==> "1\n 2\n  3\n   4\n    5\n     6\n      7\n       8\n        9\n         10"
 106  -- justify justifies
 107  , 10 `maxWidth` justify "1 2 3 4 5 6" ==> "1 2  3 4 5\n6"
 108  -- justify compresses spaces
 109  , 10 `maxWidth` justify "1 2 3 4  5 6" ==> "1 2  3 4 5\n6"
 110  , 10 `maxWidth` justify " 1 2 3 4 5 6 7 8 9" ==> " 1 2 3 4 5\n6 7 8 9"
 111  -- justify respects concatenating words
 112  , 10 `maxWidth` justify (setWidth (Just 11) ("1 2 3"<>"4 5 6 7")) ==> "1 2  34 5 6\n7"
 113  -- justify flushes the buffer before
 114  , 10 `maxWidth` "__" <> align (justify "1 2 3 4 5") ==> "__1 2  3 4\n  5"
 115  -- justify does not overflow the alignment
 116  , 10 `maxWidth` justify (nestedAlign 6) ==> "1 2 3 4 5\n         6"
 117  , 10 `maxWidth` justify ("a b c de " <> nestedAlign 2) ==> "a b  c  de\n1 2"
 118  , 10 `maxWidth` justify (bold ("12 34 56 78 "<> underline "90" <> " 123 456  789"))
 119    ==> "\ESC[1m12  34  56\n78 \ESC[4m90\ESC[0;1m  123\n456 789\ESC[0m"
 120  -- justify does not justify on explicit newlines
 121  , 10 `maxWidth` justify "1 2 3 4 5 6 7\n8 9 1 2 3 4 5" ==> "1 2  3 4 5\n6 7\n8 9  1 2 3\n4 5"
 122  -- align flushes the buffer
 123  , 10 `maxWidth` justify (ul ["1 2 3 4 5 6 7 8 9"])
 124    ==> "- 1 2  3 4\n\
 125        \  5 6  7 8\n\
 126        \  9"
 127  -- ul/ol is mempty when no item
 128  , ul [] ==> ""
 129  , ol [] ==> ""
 130  -- ul flushes the buffer
 131  , 10 `maxWidth` justify (let i = "1 2 3 4 5 6 7 8 9" in ul [i, i])
 132    ==> "- 1 2  3 4\n\
 133        \  5 6  7 8\n\
 134        \  9\n\
 135        \- 1 2  3 4\n\
 136        \  5 6  7 8\n\
 137        \  9"
 138  , 10 `maxWidth` justify (let i = "1 2 3 4 5 6 7 8 9" in
 139    ul [ul [i, i], ul [i, i]])
 140    ==> "- - 1 2  3\n\
 141        \    4 5  6\n\
 142        \    7 8 9\n\
 143        \  - 1 2  3\n\
 144        \    4 5  6\n\
 145        \    7 8 9\n\
 146        \- - 1 2  3\n\
 147        \    4 5  6\n\
 148        \    7 8 9\n\
 149        \  - 1 2  3\n\
 150        \    4 5  6\n\
 151        \    7 8 9"
 152  , 10 `maxWidth` justify (let i = "1 2 3 4 5 6 7 8 9" in
 153    ol [ol [i, i], ol [i, i]])
 154    ==> "1. 1. 1  2\n\
 155        \      3  4\n\
 156        \      5  6\n\
 157        \      7  8\n\
 158        \      9\n\
 159        \   2. 1  2\n\
 160        \      3  4\n\
 161        \      5  6\n\
 162        \      7  8\n\
 163        \      9\n\
 164        \2. 1. 1  2\n\
 165        \      3  4\n\
 166        \      5  6\n\
 167        \      7  8\n\
 168        \      9\n\
 169        \   2. 1  2\n\
 170        \      3  4\n\
 171        \      5  6\n\
 172        \      7  8\n\
 173        \      9"
 174  -- breakspace backtracking is bounded by the removable indentation
 175  -- (hence it can actually wrap a few words in reasonable time).
 176  , 80 `maxWidth`
 177   "Lorem ipsum dolor sit amet,  Nulla nec tortor. Donec id elit quis purus\
 178   \ consectetur consequat. Nam congue semper tellus. Sed erat dolor,\
 179   \ dapibus sit amet, venenatis ornare, ultrices ut, nisi. Aliquam ante.\
 180   \ Suspendisse scelerisque dui nec velit. Duis augue augue, gravida euismod,\
 181   \ vulputate ac, facilisis id, sem. Morbi in orci. Nulla purus lacus,\
 182   \ pulvinar vel, malesuada ac, mattis nec, quam. Nam molestie scelerisque\
 183   \ quam. Nullam feugiat cursus lacus.orem ipsum dolor sit amet, consectetur\
 184   \ adipiscing elit. Donec libero risus, commodo vitae, pharetra mollis,\
 185   \ posuere eu, pede. Nulla nec tortor. Donec id elit quis purus consectetur\
 186   \ consequat. Nam congue semper tellus. Sed erat dolor, dapibus sit\
 187   \ amet, venenatis ornare, ultrices ut, nisi. Aliquam ante. Suspendisse\
 188   \ scelerisque dui nec velit. Duis augue augue, gravida euismod, vulputate ac,\
 189   \ facilisis id, sem. Morbi in orci. Nulla purus lacus, pulvinar vel,\
 190   \ malesuada ac, mattis nec, quam. Nam molestie scelerisque quam.\
 191   \ Nullam feugiat cursus lacus.orem ipsum dolor sit amet, consectetur\
 192   \ adipiscing elit. Donec libero risus, commodo vitae, pharetra mollis,\
 193   \ posuere eu, pede. Nulla nec tortor. Donec id elit quis purus consectetur\
 194   \ consequat. Nam congue semper tellus. Sed erat dolor, dapibus sit amet,\
 195   \ venenatis ornare, ultrices ut, nisi. Aliquam ante. Suspendisse\
 196   \ scelerisque dui nec velit. Duis augue augue, gravida euismod, vulputate ac,\
 197   \ facilisis id, sem. Morbi in orci. Nulla purus lacus, pulvinar vel,\
 198   \ malesuada ac, mattis nec, quam. Nam molestie scelerisque quam. Nullam\
 199   \ feugiat cursus lacus.orem ipsum dolor sit amet, consectetur adipiscing\
 200   \ elit. Donec libero risus, commodo vitae, pharetra mollis, posuere eu, pede.\
 201   \ Nulla nec tortor. Donec id elit quis purus consectetur consequat. Nam\
 202   \ congue semper tellus. Sed erat dolor, dapibus sit amet, venenatis ornare,\
 203   \ ultrices ut, nisi."
 204   ==> "Lorem ipsum dolor sit amet,  Nulla nec tortor. Donec id elit quis\
 205   \ purus\nconsectetur consequat. Nam congue semper tellus. Sed erat dolor, dapibus\
 206   \ sit\namet, venenatis ornare, ultrices ut, nisi. Aliquam ante. Suspendisse\
 207   \ scelerisque\ndui nec velit. Duis augue augue, gravida euismod, vulputate ac,\
 208   \ facilisis id,\nsem. Morbi in orci. Nulla purus lacus, pulvinar vel, malesuada\
 209   \ ac, mattis nec,\nquam. Nam molestie scelerisque quam. Nullam feugiat cursus\
 210   \ lacus.orem ipsum\ndolor sit amet, consectetur adipiscing elit. Donec libero\
 211   \ risus, commodo vitae,\npharetra mollis, posuere eu, pede. Nulla nec tortor.\
 212   \ Donec id elit quis purus\nconsectetur consequat. Nam congue semper tellus. Sed\
 213   \ erat dolor, dapibus sit\namet, venenatis ornare, ultrices ut, nisi. Aliquam\
 214   \ ante. Suspendisse scelerisque\ndui nec velit. Duis augue augue, gravida\
 215   \ euismod, vulputate ac, facilisis id,\nsem. Morbi in orci. Nulla purus lacus,\
 216   \ pulvinar vel, malesuada ac, mattis nec,\nquam. Nam molestie scelerisque quam.\
 217   \ Nullam feugiat cursus lacus.orem ipsum\ndolor sit amet, consectetur adipiscing\
 218   \ elit. Donec libero risus, commodo vitae,\npharetra mollis, posuere eu, pede.\
 219   \ Nulla nec tortor. Donec id elit quis purus\nconsectetur consequat. Nam congue\
 220   \ semper tellus. Sed erat dolor, dapibus sit\namet, venenatis ornare, ultrices\
 221   \ ut, nisi. Aliquam ante. Suspendisse scelerisque\ndui nec velit. Duis augue\
 222   \ augue, gravida euismod, vulputate ac, facilisis id,\nsem. Morbi in orci. Nulla\
 223   \ purus lacus, pulvinar vel, malesuada ac, mattis nec,\nquam. Nam molestie\
 224   \ scelerisque quam. Nullam feugiat cursus lacus.orem ipsum\ndolor sit amet,\
 225   \ consectetur adipiscing elit. Donec libero risus, commodo vitae,\npharetra\
 226   \ mollis, posuere eu, pede. Nulla nec tortor. Donec id elit quis\
 227   \ purus\nconsectetur consequat. Nam congue semper tellus. Sed erat dolor, dapibus\
 228   \ sit\namet, venenatis ornare, ultrices ut, nisi."
 229  , 80 `maxWidth` justify
 230   "Lorem ipsum dolor sit amet,  Nulla nec tortor. Donec id elit quis purus\
 231   \ consectetur consequat. Nam congue semper tellus. Sed erat dolor,\
 232   \ dapibus sit amet, venenatis ornare, ultrices ut, nisi. Aliquam ante.\
 233   \ Suspendisse scelerisque dui nec velit. Duis augue augue, gravida euismod,\
 234   \ vulputate ac, facilisis id, sem. Morbi in orci. Nulla purus lacus,\
 235   \ pulvinar vel, malesuada ac, mattis nec, quam. Nam molestie scelerisque\
 236   \ quam. Nullam feugiat cursus lacus.orem ipsum dolor sit amet, consectetur\
 237   \ adipiscing elit. Donec libero risus, commodo vitae, pharetra mollis,\
 238   \ posuere eu, pede. Nulla nec tortor. Donec id elit quis purus consectetur\
 239   \ consequat. Nam congue semper tellus. Sed erat dolor, dapibus sit\
 240   \ amet, venenatis ornare, ultrices ut, nisi. Aliquam ante. Suspendisse\
 241   \ scelerisque dui nec velit. Duis augue augue, gravida euismod, vulputate ac,\
 242   \ facilisis id, sem. Morbi in orci. Nulla purus lacus, pulvinar vel,\
 243   \ malesuada ac, mattis nec, quam. Nam molestie scelerisque quam.\
 244   \ Nullam feugiat cursus lacus.orem ipsum dolor sit amet, consectetur\
 245   \ adipiscing elit. Donec libero risus, commodo vitae, pharetra mollis,\
 246   \ posuere eu, pede. Nulla nec tortor. Donec id elit quis purus consectetur\
 247   \ consequat. Nam congue semper tellus. Sed erat dolor, dapibus sit amet,\
 248   \ venenatis ornare, ultrices ut, nisi. Aliquam ante. Suspendisse\
 249   \ scelerisque dui nec velit. Duis augue augue, gravida euismod, vulputate ac,\
 250   \ facilisis id, sem. Morbi in orci. Nulla purus lacus, pulvinar vel,\
 251   \ malesuada ac, mattis nec, quam. Nam molestie scelerisque quam. Nullam\
 252   \ feugiat cursus lacus.orem ipsum dolor sit amet, consectetur adipiscing\
 253   \ elit. Donec libero risus, commodo vitae, pharetra mollis, posuere eu, pede.\
 254   \ Nulla nec tortor. Donec id elit quis purus consectetur consequat. Nam\
 255   \ congue semper tellus. Sed erat dolor, dapibus sit amet, venenatis ornare,\
 256   \ ultrices ut, nisi."
 257   ==> "Lorem ipsum  dolor sit  amet,  Nulla  nec  tortor.  Donec  id  elit  quis  purus\n\
 258   \consectetur consequat.  Nam congue  semper tellus.  Sed erat  dolor, dapibus sit\n\
 259   \amet, venenatis ornare, ultrices ut, nisi. Aliquam ante. Suspendisse scelerisque\n\
 260   \dui nec  velit. Duis  augue augue,  gravida euismod, vulputate ac, facilisis id,\n\
 261   \sem. Morbi  in orci.  Nulla purus lacus, pulvinar vel, malesuada ac, mattis nec,\n\
 262   \quam. Nam  molestie scelerisque  quam. Nullam  feugiat cursus  lacus.orem  ipsum\n\
 263   \dolor sit  amet, consectetur adipiscing elit. Donec libero risus, commodo vitae,\n\
 264   \pharetra mollis,  posuere eu,  pede. Nulla  nec tortor. Donec id elit quis purus\n\
 265   \consectetur consequat.  Nam congue  semper tellus.  Sed erat  dolor, dapibus sit\n\
 266   \amet, venenatis ornare, ultrices ut, nisi. Aliquam ante. Suspendisse scelerisque\n\
 267   \dui nec  velit. Duis  augue augue,  gravida euismod, vulputate ac, facilisis id,\n\
 268   \sem. Morbi  in orci.  Nulla purus lacus, pulvinar vel, malesuada ac, mattis nec,\n\
 269   \quam. Nam  molestie scelerisque  quam. Nullam  feugiat cursus  lacus.orem  ipsum\n\
 270   \dolor sit  amet, consectetur adipiscing elit. Donec libero risus, commodo vitae,\n\
 271   \pharetra mollis,  posuere eu,  pede. Nulla  nec tortor. Donec id elit quis purus\n\
 272   \consectetur consequat.  Nam congue  semper tellus.  Sed erat  dolor, dapibus sit\n\
 273   \amet, venenatis ornare, ultrices ut, nisi. Aliquam ante. Suspendisse scelerisque\n\
 274   \dui nec  velit. Duis  augue augue,  gravida euismod, vulputate ac, facilisis id,\n\
 275   \sem. Morbi  in orci.  Nulla purus lacus, pulvinar vel, malesuada ac, mattis nec,\n\
 276   \quam. Nam  molestie scelerisque  quam. Nullam  feugiat cursus  lacus.orem  ipsum\n\
 277   \dolor sit  amet, consectetur adipiscing elit. Donec libero risus, commodo vitae,\n\
 278   \pharetra mollis,  posuere eu,  pede. Nulla  nec tortor. Donec id elit quis purus\n\
 279   \consectetur consequat.  Nam congue  semper tellus.  Sed erat  dolor, dapibus sit\n\
 280   \amet, venenatis ornare, ultrices ut, nisi."
 281  ]
 282         where
 283         (==>) :: IsString d => d ~ String => AnsiText (Plain d) -> d -> Assertion; infix 0 ==>
 284         p ==> exp = got @?= exp
 285                 where got = runPlain $ runAnsiText p
 286
 287 testList :: String -> [Assertion] -> TestTree
 288 testList n as = testGroup n $ List.zipWith testCase (show <$> [1::Int ..]) as
 289
 290 breakpoints :: Wrappable d => Monoid d => [d] -> d
 291 breakpoints = intercalate breakpoint
 292
 293 breakspaces :: Wrappable d => Monoid d => [d] -> d
 294 breakspaces = intercalate breakspace
 295
 296 infix 1 `maxWidth`
 297 maxWidth :: Wrappable d => Width -> d -> d
 298 maxWidth = setWidth . Just
 299
 300 nestedAlign ::
 301  From (Line String) d =>
 302  Spaceable d => Indentable d => Wrappable d =>
 303  Int -> d
 304 nestedAlign n = go 1
 305         where
 306         go i =
 307                 from (Line (show i)) <>
 308                 (if n <= i then mempty
 309                 else align (breakspace <> go (i+1)))
 310
 311 listHorV :: IsString d => Indentable d => Wrappable d => [d] -> d
 312 listHorV [] = "[]"
 313 listHorV [d] = "["<>d<>"]"
 314 listHorV ds =
 315         breakalt
 316          ("[" <> intercalate ("," <> space) ds <> "]")
 317          (align $ "[" <> space
 318                  <> foldr1 (\a acc -> a <> newline <> "," <> space <> acc) ds
 319                  <> newline <> "]")
 320
 321 fun :: IsString d => Indentable d => Wrappable d => d -> d
 322 fun d = "function(" <> incrIndent 2 (breakalt d (newline<>d<>newline)) <> ")"
 323