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{-# LANGUAGE TemplateHaskell #-}
module Test.Async.State
( stateTestGroup
) where
import Control.Monad (void, when)
import Control.Monad.State (runStateT, get, modify, liftIO)
import Data.Maybe (isJust, isNothing)
import Control.Concurrent.Lifted
import Control.Exception.Lifted as E
import Test.Tasty.ExpectedFailure
import Control.Concurrent.Async.Lifted
import Test.Async.Common
stateTestGroup :: TestTree
stateTestGroup = $(testGroupGenerator)
case_async_waitCatch :: Assertion
case_async_waitCatch = do
(r, s) <- flip runStateT value $ do
a <- async $ modify (+1) >> return value
waitCatch a
case r of
Left _ -> assertFailure "An exception must not be raised."
Right e -> do
e @?= value
s @?= value + 1
case_async_wait :: Assertion
case_async_wait = do
(r, s) <- flip runStateT value $ do
a <- async $ modify (+1) >> return value
wait a
r @?= value
s @?= value + 1
case_async_exwaitCatch :: Assertion
case_async_exwaitCatch = do
(r, s) <- flip runStateT value $ do
a <- async $ modify (+1) >> throwIO TestException
waitCatch a
case r of
Left e -> do
fromException e @?= Just TestException
s @?= value
Right _ -> assertFailure "An exception must be raised."
case_async_exwait :: Assertion
case_async_exwait =
void $ flip runStateT value $ do
a <- async $ modify (+1) >> throwIO TestException
(wait a >> liftIO (assertFailure "An exception must be raised"))
`E.catch` \e -> do
liftIO $ e @?= TestException
s <- get
liftIO $ s @?= value
case_withAsync_waitCatch :: Assertion
case_withAsync_waitCatch =
void $ flip runStateT value $ do
withAsync (modify (+1) >> 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
s <- get
liftIO $ s @?= value + 1
case_withAsync_wait2 :: Assertion
case_withAsync_wait2 = do
(r, s) <- flip runStateT value $ do
a <- withAsync (modify (+1) >> threadDelay 1000000) $ return
waitCatch a
case r of
Left e -> do
fromException e @?= Just AsyncCancelled
s @?= value
Right _ -> assertFailure "An exception must be raised."
case_async_cancel :: Assertion
case_async_cancel = sequence_ $ replicate 1000 run
where
run = do
(r, s) <- flip runStateT value $ do
a <- async $ modify (+1) >> return value
cancelWith a TestException
waitCatch a
case r of
Left e -> do
fromException e @?= Just TestException
s @?= value
Right r' -> do
r' @?= value
s @?= value + 1
case_async_poll :: Assertion
case_async_poll =
void $ flip runStateT 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 runStateT 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."
case_withAsync_waitEither :: Assertion
case_withAsync_waitEither = do
(_, s) <- flip runStateT value $ do
withAsync (modify (+1)) $ \a ->
waitEither a a
liftIO $ s @?= value + 1
case_withAsync_waitEither_ :: Assertion
case_withAsync_waitEither_ = do
((), s) <- flip runStateT value $ do
withAsync (modify (+1)) $ \a ->
waitEither_ a a
liftIO $ s @?= value
case_withAsync_waitBoth1 :: Assertion
case_withAsync_waitBoth1 = do
(_, s) <- flip runStateT value $ do
withAsync (return value) $ \a ->
withAsync (modify (+1)) $ \b ->
waitBoth a b
liftIO $ s @?= value + 1
case_withAsync_waitBoth2 :: Assertion
case_withAsync_waitBoth2 = do
(_, s) <- flip runStateT value $ do
withAsync (modify (+1)) $ \a ->
withAsync (return value) $ \b ->
waitBoth a b
liftIO $ s @?= value
test_ignored :: [TestTree]
test_ignored =
[ ignoreTestBecause "see #26" $ testCase "link" $ do
r <- try $ flip runStateT 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."
]
|
