134 lines
4.3 KiB
Haskell
134 lines
4.3 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE TypeOperators #-}
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{-# LANGUAGE GADTs #-}
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{-# LANGUAGE ViewPatterns #-}
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module Servant.ClientSpec where
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import Control.Concurrent
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import Control.Exception
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import Control.Monad.Trans.Either
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import Data.Proxy
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import Data.Typeable
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import Network.Socket
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import Network.URI
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import Network.Wai
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import Network.Wai.Handler.Warp
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import Test.Hspec
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import Servant.API
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import Servant.Client
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import Servant.Server
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import Servant.ServerSpec
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type Api =
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"get" :> Get Person
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:<|> "capture" :> Capture "name" String :> Get Person
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:<|> "body" :> ReqBody Person :> Post Person
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:<|> "param" :> QueryParam "name" String :> Get Person
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api :: Proxy Api
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api = Proxy
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server :: Application
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server = serve api (
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return alice
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:<|> (\ name -> return $ Person name 0)
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:<|> return
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:<|> (\ name -> case name of
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Just "alice" -> return alice
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Just name -> left (400, name ++ " not found")
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Nothing -> left (400, "missing parameter"))
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)
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withServer :: (URIAuth -> IO a) -> IO a
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withServer action = withWaiDaemon (return server) (action . mkHost "localhost")
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getGet :: URIAuth -> EitherT String IO Person
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getCapture :: String -> URIAuth -> EitherT String IO Person
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getBody :: Person -> URIAuth -> EitherT String IO Person
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getQueryParam :: Maybe String -> URIAuth -> EitherT String IO Person
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(getGet :<|> getCapture :<|> getBody :<|> getQueryParam) = client api
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spec :: Spec
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spec = do
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it "Servant.API.Get" $ withServer $ \ host -> do
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runEitherT (getGet host) `shouldReturn` Right alice
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it "Servant.API.Capture" $ withServer $ \ host -> do
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runEitherT (getCapture "Paula" host) `shouldReturn` Right (Person "Paula" 0)
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it "Servant.API.ReqBody" $ withServer $ \ host -> do
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let p = Person "Clara" 42
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runEitherT (getBody p host) `shouldReturn` Right p
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it "Servant.API.QueryParam" $ withServer $ \ host -> do
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runEitherT (getQueryParam (Just "alice") host) `shouldReturn` Right alice
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Left result <- runEitherT (getQueryParam (Just "bob") host)
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result `shouldContain` "bob not found"
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context "client correctly handles error status codes" $ do
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let test :: WrappedApi -> Spec
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test (WrappedApi api) =
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it (show (typeOf api)) $
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withWaiDaemon (return (serve api (left (500, "error message")))) $
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\ (mkHost "localhost" -> host) -> do
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let getResponse :: URIAuth -> EitherT String IO ()
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getResponse = client api
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Left result <- runEitherT (getResponse host)
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result `shouldContain` "error message"
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mapM_ test $
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(WrappedApi (Proxy :: Proxy Delete)) :
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(WrappedApi (Proxy :: Proxy (Get ()))) :
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(WrappedApi (Proxy :: Proxy (Post ()))) :
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(WrappedApi (Proxy :: Proxy (Put ()))) :
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[]
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data WrappedApi where
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WrappedApi :: (HasServer api, Server api ~ EitherT (Int, String) IO a,
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HasClient api, Client api ~ (URIAuth -> EitherT String IO ()),
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Typeable api) =>
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Proxy api -> WrappedApi
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-- * utils
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withWaiDaemon :: IO Application -> (Port -> IO a) -> IO a
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withWaiDaemon mkApplication action = do
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application <- mkApplication
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bracket (acquire application) free (\ (_, _, port) -> action port)
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where
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acquire application = do
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(notifyStart, waitForStart) <- lvar
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(notifyKilled, waitForKilled) <- lvar
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thread <- forkIO $ (do
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(krakenPort, socket) <- openTestSocket
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let settings =
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setPort krakenPort $ -- set here just for consistency, shouldn't be
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-- used (it's set in the socket)
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setBeforeMainLoop (notifyStart krakenPort)
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defaultSettings
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runSettingsSocket settings socket application)
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`finally` notifyKilled ()
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krakenPort <- waitForStart
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return (thread, waitForKilled, krakenPort)
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free (thread, waitForKilled, _) = do
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killThread thread
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waitForKilled
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lvar :: IO (a -> IO (), IO a)
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lvar = do
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mvar <- newEmptyMVar
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let put = putMVar mvar
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wait = readMVar mvar
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return (put, wait)
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openTestSocket :: IO (Port, Socket)
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openTestSocket = do
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s <- socket AF_INET Stream defaultProtocol
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localhost <- inet_addr "127.0.0.1"
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bind s (SockAddrInet aNY_PORT localhost)
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listen s 1
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port <- socketPort s
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return (fromIntegral port, s)
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