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|
{-# LANGUAGE OverloadedStrings #-}
module Utils where
import Control.Concurrent.Chan
import Control.Exception
import qualified Data.ByteString as B
import qualified Data.ByteString.Char8 as BC8
import Data.String
import System.Directory ( removeDirectoryRecursive )
import System.Environment
import System.Exit
import System.INotify
import System.Posix.ByteString.FilePath
import System.Posix.Directory.ByteString
import System.Posix.Files.ByteString
testName :: IO RawFilePath
testName = do
n <- getProgName
return (fromString n `B.append` "-playground")
withTempDir :: (RawFilePath -> IO a) -> IO a
withTempDir f = do
path <- testName
bracket
( createDirectory path ownerModes >> return path )
( removeDirectoryRecursive . fromString . BC8.unpack )
f
withWatch :: INotify -> [EventVariety] -> RawFilePath -> (Event -> IO ()) -> IO a -> IO a
withWatch inot events path action f =
bracket
( addWatch inot events path action )
removeWatch
( const f )
inTestEnviron :: [EventVariety] -> (FilePath -> IO a) -> ([Event] -> IO b) -> IO b
inTestEnviron events action f =
withTempDir $ \testPath -> do
inot <- initINotify
chan <- newChan
withWatch inot events testPath (writeChan chan) $ do
_ <- action (fromString . BC8.unpack $ testPath)
events' <- getChanContents chan
f events'
(~=) :: Eq a => [a] -> [a] -> Bool
[] ~= _ = True
(x:xs) ~= (y:ys) = x == y && xs ~= ys
_ ~= _ = False
asMany :: [a] -> [a] -> [a]
asMany xs ys = take (length xs) ys
explainFailure :: Show a => [a] -> [a] -> String
explainFailure expected reality = unlines $
[ "Expected:" ] ++
[ "> " ++ show x | x <- expected ] ++
[ "But got:" ] ++
[ "< " ++ show x | x <- asMany expected reality ]
testFailure, testSuccess :: IO a
testFailure = exitFailure
testSuccess = exitSuccess
|
