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module Utils where
import Control.Concurrent.Chan
import Control.Exception
import System.Directory
import System.Environment
import System.Exit
import System.INotify
testName = do
n <- getProgName
return (n ++ "-playground")
withTempDir f = do
path <- testName
bracket
( createDirectory path >> return path )
( removeDirectoryRecursive )
( f )
withWatch inot events path action f =
bracket
( addWatch inot events path action )
removeWatch
( const f )
inTestEnviron events action f = do
withTempDir $ \testPath -> do
inot <- initINotify
chan <- newChan
withWatch inot events testPath (writeChan chan) $ do
action 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 expected reality = do
putStrLn "Expected:"
mapM_ (\x -> putStr "> " >> print x) expected
putStrLn "But got:"
mapM_ (\x -> putStr "< " >> print x) (asMany expected reality)
testFailure
testFailure = exitFailure
testSuccess = exitWith ExitSuccess
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