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{-# LANGUAGE CPP #-}
{-# LANGUAGE TemplateHaskell #-}
module Test.Async.Reader
( readerTestGroup
) where
import Control.Monad (void, when)
import Control.Monad.Reader (runReaderT, liftIO)
import Data.Maybe (isJust, isNothing)
import Control.Concurrent.Lifted
import Control.Exception.Lifted as E
import Test.Tasty.ExpectedFailure
#if MIN_VERSION_monad_control(1, 0, 0)
import Control.Concurrent.Async.Lifted.Safe
#else
import Control.Concurrent.Async.Lifted
#endif
import Test.Async.Common
readerTestGroup :: TestTree
readerTestGroup = $(testGroupGenerator)
case_async_waitCatch :: Assertion
case_async_waitCatch = do
r <- flip runReaderT value $ do
a <- async $ return value
waitCatch a
case r of
Left _ -> assertFailure "An exception must not be raised."
Right e -> do
e @?= value
case_async_wait :: Assertion
case_async_wait = do
r <- flip runReaderT value $ do
a <- async $ return value
wait a
r @?= value
case_async_exwaitCatch :: Assertion
case_async_exwaitCatch = do
r <- flip runReaderT value $ do
a <- async $ throwIO TestException
waitCatch a
case r of
Left e ->
fromException e @?= Just TestException
Right _ -> assertFailure "An exception must be raised."
case_async_exwait :: Assertion
case_async_exwait =
void $ flip runReaderT value $ do
a <- async $ throwIO TestException
(wait a >> liftIO (assertFailure "An exception must be raised"))
`E.catch` \e ->
liftIO $ e @?= TestException
case_withAsync_waitCatch :: Assertion
case_withAsync_waitCatch =
void $ flip runReaderT value $ do
withAsync (return value) $ \a -> do
r <- waitCatch a
case r of
Left _ -> liftIO $ assertFailure "An exception must not be raised."
Right e -> do
liftIO $ e @?= value
case_withAsync_wait2 :: Assertion
case_withAsync_wait2 = do
r <- flip runReaderT value $ do
a <- withAsync (threadDelay 1000000) $ return
waitCatch a
case r of
Left e -> do
fromException e @?= Just AsyncCancelled
Right _ -> assertFailure "An exception must be raised."
case_async_cancel :: Assertion
case_async_cancel = sequence_ $ replicate 1000 run
where
run = do
r <- flip runReaderT value $ do
a <- async $ return value
cancelWith a TestException
waitCatch a
case r of
Left e ->
fromException e @?= Just TestException
Right r' ->
r' @?= value
case_async_poll :: Assertion
case_async_poll =
void $ flip runReaderT value $ do
a <- async (threadDelay 1000000)
r <- poll a
when (isJust r) $
liftIO $ assertFailure "The result must be nothing."
r' <- poll a -- poll twice, just to check we don't deadlock
when (isJust r') $
liftIO $ assertFailure "The result must be Nothing."
case_async_poll2 :: Assertion
case_async_poll2 =
void $ flip runReaderT value $ do
a <- async (return value)
void $ wait a
r <- poll a
when (isNothing r) $
liftIO $ assertFailure "The result must not be Nothing."
r' <- poll a -- poll twice, just to check we don't deadlock
when (isNothing r') $
liftIO $ assertFailure "The result must not be Nothing."
test_ignored :: [TestTree]
test_ignored =
[ ignoreTestBecause "see #26" $ testCase "link" $ do
r <- try $ flip runReaderT value $ do
a <- async $ threadDelay 1000000 >> return value
link a
cancelWith a TestException
wait a
case r of
Left e -> case fromException e of
Just (ExceptionInLinkedThread _ e') ->
fromException e' @?= Just TestException
Nothing -> assertFailure $
"expected ExceptionInLinkedThread _ TestException"
++ " but got " ++ show e
Right _ -> assertFailure "An exception must be raised."
]
|
