test/hs/ThriftTestUtils.hs

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--   http://www.apache.org/licenses/LICENSE-2.0
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module ThriftTestUtils (ClientFunc, ServerFunc, clientLog, serverLog, testLog, runTest) where


import qualified Control.Concurrent
import qualified Network
import qualified System.IO


serverPort :: Network.PortNumber
serverPort = 9090

serverAddress :: (String, Network.PortID)
serverAddress = ("localhost", Network.PortNumber serverPort)


testLog :: String -> IO ()
testLog str = do
    System.IO.hPutStr System.IO.stdout $ str ++ "\n"
    System.IO.hFlush System.IO.stdout


clientLog :: String -> IO ()
clientLog str = testLog $ "CLIENT: " ++ str

serverLog :: String -> IO ()
serverLog str = testLog $ "SERVER: " ++ str


type ServerFunc = Network.PortNumber -> IO ()
type ClientFunc = (String, Network.PortID) -> IO ()

runTest :: ServerFunc -> ClientFunc -> IO ()
runTest server client = do
    _ <- Control.Concurrent.forkIO (server serverPort)

    -- Fairly horrible; this does not 100% guarantees that the other thread
    -- has actually opened the socket we need... but not much else we can do
    -- without this, the client races the server to the socket, and wins every
    -- time
    Control.Concurrent.yield
    Control.Concurrent.threadDelay $ 500 * 1000 -- unit is in _micro_seconds
    Control.Concurrent.yield

    _ <- client serverAddress

    testLog "SUCCESS"