module Network.Wai.Test
(
Session
, runSession
, request
, srequest
, SRequest (..)
, SResponse (..)
, assertStatus
, assertContentType
, assertBody
, assertHeader
, assertNoHeader
) where
import Network.Wai
import qualified Test.HUnit.Base as H
import Control.Monad.IO.Class (liftIO)
import Control.Monad.Trans.State (StateT, evalStateT)
import Control.Monad.Trans.Reader (ReaderT, runReaderT, ask)
import Data.Map (Map)
import qualified Data.Map as Map
import Data.ByteString (ByteString)
import qualified Data.ByteString.Char8 as S8
import Data.Enumerator (joinI, ($$), run_, enumList)
import Data.Enumerator.List (consume)
import Blaze.ByteString.Builder.Enumerator (builderToByteString)
import qualified Data.ByteString.Lazy as L
import qualified Data.ByteString.Lazy.Char8 as L8
import qualified Network.HTTP.Types as H
import Data.CaseInsensitive (CI)
type Session = ReaderT Application (StateT ClientState IO)
data ClientState = ClientState
{ clientCookies :: Map ByteString ByteString
}
initState :: ClientState
initState = ClientState Map.empty
runSession :: Session a -> Application -> IO a
runSession session app = evalStateT (runReaderT session app) initState
data SRequest = SRequest
{ simpleRequest :: Request
, simpleRequestBody :: L.ByteString
}
data SResponse = SResponse
{ simpleStatus :: H.Status
, simpleHeaders :: H.ResponseHeaders
, simpleBody :: L.ByteString
}
deriving (Show, Eq)
request :: Request -> Session SResponse
request = srequest . flip SRequest L.empty
srequest :: SRequest -> Session SResponse
srequest (SRequest req bod) = do
app <- ask
res <- liftIO $ run_ $ enumList 4 (L.toChunks bod) $$ app req
sres <- liftIO $ runResponse res
return sres
runResponse :: Response -> IO SResponse
runResponse res =
responseEnumerator res go
where
go s h = do
bss <- joinI $ builderToByteString $$ consume
return $ SResponse s h $ L.fromChunks bss
assertBool :: String -> Bool -> Session ()
assertBool s b = liftIO $ H.assertBool s b
assertString :: String -> Session ()
assertString s = liftIO $ H.assertString s
assertContentType :: ByteString -> SResponse -> Session ()
assertContentType ct SResponse{simpleHeaders = h} =
case lookup "content-type" h of
Nothing -> assertString $ concat
[ "Expected content type "
, show ct
, ", but no content type provided"
]
Just ct' -> assertBool (concat
[ "Expected content type "
, show ct
, ", but received "
, show ct'
]) (go ct == go ct')
where
go = S8.takeWhile (/= ';')
assertStatus :: Int -> SResponse -> Session ()
assertStatus i SResponse{simpleStatus = s} = assertBool (concat
[ "Expected status code "
, show i
, ", but received "
, show sc
]) $ i == sc
where
sc = H.statusCode s
assertBody :: L.ByteString -> SResponse -> Session ()
assertBody lbs SResponse{simpleBody = lbs'} = assertBool (concat
[ "Expected response body "
, show $ L8.unpack lbs
, ", but received "
, show $ L8.unpack lbs'
]) $ lbs == lbs'
assertHeader :: CI ByteString -> ByteString -> SResponse -> Session ()
assertHeader header value SResponse{simpleHeaders = h} =
case lookup header h of
Nothing -> assertString $ concat
[ "Expected header "
, show header
, " to be "
, show value
, ", but it was not present"
]
Just value' -> assertBool (concat
[ "Expected header "
, show header
, " to be "
, show value
, ", but received "
, show value'
]) (value == value')
assertNoHeader :: CI ByteString -> SResponse -> Session ()
assertNoHeader header SResponse{simpleHeaders = h} =
case lookup header h of
Nothing -> return ()
Just s -> assertString $ concat
[ "Unexpected header "
, show header
, " containing "
, show s
]