674 lines
23 KiB
Haskell
674 lines
23 KiB
Haskell
{-# LANGUAGE CPP #-}
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE TypeOperators #-}
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{-# LANGUAGE TypeSynonymInstances #-}
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{-# LANGUAGE FlexibleInstances #-}
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module Servant.ServerSpec where
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#if !MIN_VERSION_base(4,8,0)
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import Control.Applicative ((<$>))
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#endif
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import Control.Monad (forM_, when)
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import Control.Monad.Trans.Except (ExceptT, throwE)
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import Data.Aeson (FromJSON, ToJSON, decode', encode)
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import Data.ByteString.Conversion ()
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import Data.Char (toUpper)
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import Data.Monoid ((<>))
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import Data.Proxy (Proxy (Proxy))
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import Data.String (fromString)
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import Data.String.Conversions (cs)
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import qualified Data.Text as T
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import GHC.Generics (Generic)
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import Network.HTTP.Types (hAccept, hContentType,
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methodDelete, methodGet, methodHead,
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methodPatch, methodPost, methodPut,
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ok200, parseQuery, status409,
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Status(..))
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import Network.Wai (Application, Request, pathInfo,
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queryString, rawQueryString,
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responseLBS, responseBuilder)
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import Network.Wai.Internal (Response(ResponseBuilder))
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import Network.Wai.Test (defaultRequest, request,
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runSession, simpleBody)
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import Test.Hspec (Spec, describe, it, shouldBe)
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import Test.Hspec.Wai (get, liftIO, matchHeaders,
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matchStatus, post, request,
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shouldRespondWith, with, (<:>))
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import Servant.API ((:<|>) (..), (:>), Capture, Delete,
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Get, Header (..), Headers,
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HttpVersion, IsSecure (..), JSON,
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Patch, PlainText, Post, Put,
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QueryFlag, QueryParam, QueryParams,
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Raw, RemoteHost, ReqBody,
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addHeader)
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import Servant.Server (Server, serve, ServantErr(..), err404)
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import Servant.Server.Internal.Router
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(tweakResponse, runRouter,
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Router, Router'(LeafRouter))
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import Servant.Server.Internal.RoutingApplication
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(RouteResult(..), RouteMismatch(..),
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toApplication)
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-- * test data types
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data Person = Person {
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name :: String,
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age :: Integer
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}
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deriving (Eq, Show, Generic)
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instance ToJSON Person
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instance FromJSON Person
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alice :: Person
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alice = Person "Alice" 42
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data Animal = Animal {
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species :: String,
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numberOfLegs :: Integer
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}
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deriving (Eq, Show, Generic)
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instance ToJSON Animal
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instance FromJSON Animal
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jerry :: Animal
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jerry = Animal "Mouse" 4
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tweety :: Animal
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tweety = Animal "Bird" 2
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-- * specs
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spec :: Spec
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spec = do
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captureSpec
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getSpec
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headSpec
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postSpec
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putSpec
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patchSpec
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queryParamSpec
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headerSpec
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rawSpec
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unionSpec
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prioErrorsSpec
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errorsSpec
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routerSpec
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responseHeadersSpec
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miscReqCombinatorsSpec
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type CaptureApi = Capture "legs" Integer :> Get '[JSON] Animal
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captureApi :: Proxy CaptureApi
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captureApi = Proxy
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captureServer :: Integer -> ExceptT ServantErr IO Animal
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captureServer legs = case legs of
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4 -> return jerry
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2 -> return tweety
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_ -> throwE err404
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captureSpec :: Spec
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captureSpec = do
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describe "Servant.API.Capture" $ do
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with (return (serve captureApi captureServer)) $ do
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it "can capture parts of the 'pathInfo'" $ do
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response <- get "/2"
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liftIO $ decode' (simpleBody response) `shouldBe` Just tweety
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it "returns 404 if the decoding fails" $ do
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get "/notAnInt" `shouldRespondWith` 404
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with (return (serve
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(Proxy :: Proxy (Capture "captured" String :> Raw))
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(\ "captured" request_ respond ->
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respond $ responseLBS ok200 [] (cs $ show $ pathInfo request_)))) $ do
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it "strips the captured path snippet from pathInfo" $ do
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get "/captured/foo" `shouldRespondWith` (fromString (show ["foo" :: String]))
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type GetApi = Get '[JSON] Person
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:<|> "empty" :> Get '[] ()
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:<|> "post" :> Post '[] ()
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getApi :: Proxy GetApi
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getApi = Proxy
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getSpec :: Spec
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getSpec = do
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describe "Servant.API.Get" $ do
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let server = return alice :<|> return () :<|> return ()
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with (return $ serve getApi server) $ do
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it "allows to GET a Person" $ do
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response <- get "/"
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return response `shouldRespondWith` 200
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liftIO $ decode' (simpleBody response) `shouldBe` Just alice
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it "throws 405 (wrong method) on POSTs" $ do
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post "/" "" `shouldRespondWith` 405
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post "/empty" "" `shouldRespondWith` 405
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it "returns 204 if the type is '()'" $ do
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get "/empty" `shouldRespondWith` ""{ matchStatus = 204 }
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it "returns 415 if the Accept header is not supported" $ do
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Test.Hspec.Wai.request methodGet "" [(hAccept, "crazy/mime")] ""
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`shouldRespondWith` 415
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headSpec :: Spec
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headSpec = do
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describe "Servant.API.Head" $ do
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let server = return alice :<|> return () :<|> return ()
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with (return $ serve getApi server) $ do
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it "allows to GET a Person" $ do
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response <- Test.Hspec.Wai.request methodHead "/" [] ""
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return response `shouldRespondWith` 200
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liftIO $ decode' (simpleBody response) `shouldBe` (Nothing :: Maybe Person)
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it "does not allow HEAD to POST route" $ do
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response <- Test.Hspec.Wai.request methodHead "/post" [] ""
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return response `shouldRespondWith` 405
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it "throws 405 (wrong method) on POSTs" $ do
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post "/" "" `shouldRespondWith` 405
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post "/empty" "" `shouldRespondWith` 405
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it "returns 204 if the type is '()'" $ do
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response <- Test.Hspec.Wai.request methodHead "/empty" [] ""
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return response `shouldRespondWith` ""{ matchStatus = 204 }
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it "returns 415 if the Accept header is not supported" $ do
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Test.Hspec.Wai.request methodHead "" [(hAccept, "crazy/mime")] ""
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`shouldRespondWith` 415
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type QueryParamApi = QueryParam "name" String :> Get '[JSON] Person
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:<|> "a" :> QueryParams "names" String :> Get '[JSON] Person
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:<|> "b" :> QueryFlag "capitalize" :> Get '[JSON] Person
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queryParamApi :: Proxy QueryParamApi
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queryParamApi = Proxy
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qpServer :: Server QueryParamApi
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qpServer = queryParamServer :<|> qpNames :<|> qpCapitalize
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where qpNames (_:name2:_) = return alice { name = name2 }
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qpNames _ = return alice
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qpCapitalize False = return alice
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qpCapitalize True = return alice { name = map toUpper (name alice) }
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queryParamServer (Just name_) = return alice{name = name_}
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queryParamServer Nothing = return alice
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queryParamSpec :: Spec
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queryParamSpec = do
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describe "Servant.API.QueryParam" $ do
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it "allows to retrieve simple GET parameters" $
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(flip runSession) (serve queryParamApi qpServer) $ do
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let params1 = "?name=bob"
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response1 <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params1,
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queryString = parseQuery params1
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}
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liftIO $ do
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decode' (simpleBody response1) `shouldBe` Just alice{
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name = "bob"
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}
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it "allows to retrieve lists in GET parameters" $
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(flip runSession) (serve queryParamApi qpServer) $ do
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let params2 = "?names[]=bob&names[]=john"
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response2 <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params2,
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queryString = parseQuery params2,
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pathInfo = ["a"]
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}
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liftIO $
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decode' (simpleBody response2) `shouldBe` Just alice{
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name = "john"
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}
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it "allows to retrieve value-less GET parameters" $
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(flip runSession) (serve queryParamApi qpServer) $ do
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let params3 = "?capitalize"
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response3 <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params3,
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queryString = parseQuery params3,
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pathInfo = ["b"]
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}
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liftIO $
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decode' (simpleBody response3) `shouldBe` Just alice{
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name = "ALICE"
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}
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let params3' = "?capitalize="
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response3' <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params3',
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queryString = parseQuery params3',
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pathInfo = ["b"]
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}
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liftIO $
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decode' (simpleBody response3') `shouldBe` Just alice{
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name = "ALICE"
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}
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let params3'' = "?unknown="
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response3' <- Network.Wai.Test.request defaultRequest{
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rawQueryString = params3'',
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queryString = parseQuery params3'',
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pathInfo = ["b"]
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}
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liftIO $
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decode' (simpleBody response3') `shouldBe` Just alice{
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name = "Alice"
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}
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type PostApi =
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ReqBody '[JSON] Person :> Post '[JSON] Integer
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:<|> "bla" :> ReqBody '[JSON] Person :> Post '[JSON] Integer
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:<|> "empty" :> Post '[] ()
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postApi :: Proxy PostApi
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postApi = Proxy
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postSpec :: Spec
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postSpec = do
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describe "Servant.API.Post and .ReqBody" $ do
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let server = return . age :<|> return . age :<|> return ()
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with (return $ serve postApi server) $ do
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let post' x = Test.Hspec.Wai.request methodPost x [(hContentType
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, "application/json;charset=utf-8")]
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it "allows to POST a Person" $ do
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post' "/" (encode alice) `shouldRespondWith` "42"{
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matchStatus = 201
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}
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it "allows alternative routes if all have request bodies" $ do
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post' "/bla" (encode alice) `shouldRespondWith` "42"{
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matchStatus = 201
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}
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it "handles trailing '/' gracefully" $ do
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post' "/bla/" (encode alice) `shouldRespondWith` "42"{
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matchStatus = 201
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}
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it "correctly rejects invalid request bodies with status 400" $ do
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post' "/" "some invalid body" `shouldRespondWith` 400
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it "returns 204 if the type is '()'" $ do
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post' "empty" "" `shouldRespondWith` ""{ matchStatus = 204 }
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it "responds with 415 if the requested media type is unsupported" $ do
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let post'' x = Test.Hspec.Wai.request methodPost x [(hContentType
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, "application/nonsense")]
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post'' "/" "anything at all" `shouldRespondWith` 415
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type PutApi =
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ReqBody '[JSON] Person :> Put '[JSON] Integer
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:<|> "bla" :> ReqBody '[JSON] Person :> Put '[JSON] Integer
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:<|> "empty" :> Put '[] ()
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putApi :: Proxy PutApi
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putApi = Proxy
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putSpec :: Spec
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putSpec = do
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describe "Servant.API.Put and .ReqBody" $ do
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let server = return . age :<|> return . age :<|> return ()
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with (return $ serve putApi server) $ do
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let put' x = Test.Hspec.Wai.request methodPut x [(hContentType
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, "application/json;charset=utf-8")]
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it "allows to put a Person" $ do
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put' "/" (encode alice) `shouldRespondWith` "42"{
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matchStatus = 200
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}
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it "allows alternative routes if all have request bodies" $ do
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put' "/bla" (encode alice) `shouldRespondWith` "42"{
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matchStatus = 200
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}
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it "handles trailing '/' gracefully" $ do
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put' "/bla/" (encode alice) `shouldRespondWith` "42"{
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matchStatus = 200
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}
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it "correctly rejects invalid request bodies with status 400" $ do
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put' "/" "some invalid body" `shouldRespondWith` 400
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it "returns 204 if the type is '()'" $ do
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put' "empty" "" `shouldRespondWith` ""{ matchStatus = 204 }
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it "responds with 415 if the requested media type is unsupported" $ do
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let put'' x = Test.Hspec.Wai.request methodPut x [(hContentType
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, "application/nonsense")]
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put'' "/" "anything at all" `shouldRespondWith` 415
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type PatchApi =
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ReqBody '[JSON] Person :> Patch '[JSON] Integer
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:<|> "bla" :> ReqBody '[JSON] Person :> Patch '[JSON] Integer
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:<|> "empty" :> Patch '[] ()
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patchApi :: Proxy PatchApi
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patchApi = Proxy
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patchSpec :: Spec
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patchSpec = do
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describe "Servant.API.Patch and .ReqBody" $ do
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let server = return . age :<|> return . age :<|> return ()
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with (return $ serve patchApi server) $ do
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let patch' x = Test.Hspec.Wai.request methodPatch x [(hContentType
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, "application/json;charset=utf-8")]
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it "allows to patch a Person" $ do
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patch' "/" (encode alice) `shouldRespondWith` "42"{
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matchStatus = 200
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}
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it "allows alternative routes if all have request bodies" $ do
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patch' "/bla" (encode alice) `shouldRespondWith` "42"{
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matchStatus = 200
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}
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it "handles trailing '/' gracefully" $ do
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patch' "/bla/" (encode alice) `shouldRespondWith` "42"{
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matchStatus = 200
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}
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it "correctly rejects invalid request bodies with status 400" $ do
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patch' "/" "some invalid body" `shouldRespondWith` 400
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it "returns 204 if the type is '()'" $ do
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patch' "empty" "" `shouldRespondWith` ""{ matchStatus = 204 }
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it "responds with 415 if the requested media type is unsupported" $ do
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let patch'' x = Test.Hspec.Wai.request methodPatch x [(hContentType
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, "application/nonsense")]
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patch'' "/" "anything at all" `shouldRespondWith` 415
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type HeaderApi a = Header "MyHeader" a :> Delete '[JSON] ()
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headerApi :: Proxy (HeaderApi a)
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headerApi = Proxy
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headerSpec :: Spec
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headerSpec = describe "Servant.API.Header" $ do
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let expectsInt :: Maybe Int -> ExceptT ServantErr IO ()
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expectsInt (Just x) = when (x /= 5) $ error "Expected 5"
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expectsInt Nothing = error "Expected an int"
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let expectsString :: Maybe String -> ExceptT ServantErr IO ()
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expectsString (Just x) = when (x /= "more from you") $ error "Expected more from you"
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expectsString Nothing = error "Expected a string"
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with (return (serve headerApi expectsInt)) $ do
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let delete' x = Test.Hspec.Wai.request methodDelete x [("MyHeader" ,"5")]
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it "passes the header to the handler (Int)" $
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delete' "/" "" `shouldRespondWith` 204
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with (return (serve headerApi expectsString)) $ do
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let delete' x = Test.Hspec.Wai.request methodDelete x [("MyHeader" ,"more from you")]
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it "passes the header to the handler (String)" $
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delete' "/" "" `shouldRespondWith` 204
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type RawApi = "foo" :> Raw
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rawApi :: Proxy RawApi
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rawApi = Proxy
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rawApplication :: Show a => (Request -> a) -> Application
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rawApplication f request_ respond = respond $ responseLBS ok200 [] (cs $ show $ f request_)
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rawSpec :: Spec
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rawSpec = do
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describe "Servant.API.Raw" $ do
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it "runs applications" $ do
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(flip runSession) (serve rawApi (rawApplication (const (42 :: Integer)))) $ do
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response <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["foo"]
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}
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liftIO $ do
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simpleBody response `shouldBe` "42"
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it "gets the pathInfo modified" $ do
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(flip runSession) (serve rawApi (rawApplication pathInfo)) $ do
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response <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["foo", "bar"]
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}
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liftIO $ do
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simpleBody response `shouldBe` cs (show ["bar" :: String])
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type AlternativeApi =
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"foo" :> Get '[JSON] Person
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:<|> "bar" :> Get '[JSON] Animal
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:<|> "foo" :> Get '[PlainText] T.Text
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:<|> "bar" :> Post '[JSON] Animal
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:<|> "bar" :> Put '[JSON] Animal
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:<|> "bar" :> Delete '[JSON] ()
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unionApi :: Proxy AlternativeApi
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unionApi = Proxy
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unionServer :: Server AlternativeApi
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unionServer =
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return alice
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:<|> return jerry
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:<|> return "a string"
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:<|> return jerry
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:<|> return jerry
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:<|> return ()
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unionSpec :: Spec
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unionSpec = do
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describe "Servant.API.Alternative" $ do
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with (return $ serve unionApi unionServer) $ do
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it "unions endpoints" $ do
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response <- get "/foo"
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liftIO $ do
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decode' (simpleBody response) `shouldBe`
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Just alice
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response_ <- get "/bar"
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liftIO $ do
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decode' (simpleBody response_) `shouldBe`
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Just jerry
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it "checks all endpoints before returning 415" $ do
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get "/foo" `shouldRespondWith` 200
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it "returns 404 if the path does not exist" $ do
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get "/nonexistent" `shouldRespondWith` 404
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type ResponseHeadersApi =
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Get '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String)
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:<|> Post '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String)
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:<|> Put '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String)
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:<|> Patch '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String)
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responseHeadersServer :: Server ResponseHeadersApi
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responseHeadersServer = let h = return $ addHeader 5 $ addHeader "kilroy" "hi"
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in h :<|> h :<|> h :<|> h
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responseHeadersSpec :: Spec
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responseHeadersSpec = describe "ResponseHeaders" $ do
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with (return $ serve (Proxy :: Proxy ResponseHeadersApi) responseHeadersServer) $ do
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let methods = [(methodGet, 200), (methodPost, 201), (methodPut, 200), (methodPatch, 200)]
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it "includes the headers in the response" $
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forM_ methods $ \(method, expected) ->
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Test.Hspec.Wai.request method "/" [] ""
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`shouldRespondWith` "\"hi\""{ matchHeaders = ["H1" <:> "5", "H2" <:> "kilroy"]
|
|
, matchStatus = expected
|
|
}
|
|
|
|
it "responds with not found for non-existent endpoints" $
|
|
forM_ methods $ \(method,_) ->
|
|
Test.Hspec.Wai.request method "blahblah" [] ""
|
|
`shouldRespondWith` 404
|
|
|
|
it "returns 415 if the Accept header is not supported" $
|
|
forM_ methods $ \(method,_) ->
|
|
Test.Hspec.Wai.request method "" [(hAccept, "crazy/mime")] ""
|
|
`shouldRespondWith` 415
|
|
|
|
type PrioErrorsApi = ReqBody '[JSON] Person :> "foo" :> Get '[JSON] Integer
|
|
|
|
prioErrorsApi :: Proxy PrioErrorsApi
|
|
prioErrorsApi = Proxy
|
|
|
|
-- | Test the relative priority of error responses from the server.
|
|
--
|
|
-- In particular, we check whether matching continues even if a 'ReqBody'
|
|
-- or similar construct is encountered early in a path. We don't want to
|
|
-- see a complaint about the request body unless the path actually matches.
|
|
--
|
|
prioErrorsSpec :: Spec
|
|
prioErrorsSpec = describe "PrioErrors" $ do
|
|
let server = return . age
|
|
with (return $ serve prioErrorsApi server) $ do
|
|
let check (mdescr, method) path (cdescr, ctype, body) resp =
|
|
it fulldescr $
|
|
Test.Hspec.Wai.request method path [(hContentType, ctype)] body
|
|
`shouldRespondWith` resp
|
|
where
|
|
fulldescr = "returns " ++ show (matchStatus resp) ++ " on " ++ mdescr
|
|
++ " " ++ cs path ++ " (" ++ cdescr ++ ")"
|
|
|
|
get' = ("GET", methodGet)
|
|
put' = ("PUT", methodPut)
|
|
|
|
txt = ("text" , "text/plain;charset=utf8" , "42" )
|
|
ijson = ("invalid json", "application/json;charset=utf8", "invalid" )
|
|
vjson = ("valid json" , "application/json;charset=utf8", encode alice)
|
|
|
|
check get' "/" txt 404
|
|
check get' "/bar" txt 404
|
|
check get' "/foo" txt 415
|
|
check put' "/" txt 404
|
|
check put' "/bar" txt 404
|
|
check put' "/foo" txt 405
|
|
check get' "/" ijson 404
|
|
check get' "/bar" ijson 404
|
|
check get' "/foo" ijson 400
|
|
check put' "/" ijson 404
|
|
check put' "/bar" ijson 404
|
|
check put' "/foo" ijson 405
|
|
check get' "/" vjson 404
|
|
check get' "/bar" vjson 404
|
|
check get' "/foo" vjson 200
|
|
check put' "/" vjson 404
|
|
check put' "/bar" vjson 404
|
|
check put' "/foo" vjson 405
|
|
|
|
-- | Test server error functionality.
|
|
errorsSpec :: Spec
|
|
errorsSpec = do
|
|
let he = HttpError status409 (Just "A custom error")
|
|
let ib = InvalidBody "The body is invalid"
|
|
let wm = WrongMethod
|
|
let nf = NotFound
|
|
|
|
describe "Servant.Server.Internal.RouteMismatch" $ do
|
|
it "HttpError > *" $ do
|
|
ib <> he `shouldBe` he
|
|
wm <> he `shouldBe` he
|
|
nf <> he `shouldBe` he
|
|
|
|
he <> ib `shouldBe` he
|
|
he <> wm `shouldBe` he
|
|
he <> nf `shouldBe` he
|
|
|
|
it "HE > InvalidBody > (WM,NF)" $ do
|
|
he <> ib `shouldBe` he
|
|
wm <> ib `shouldBe` ib
|
|
nf <> ib `shouldBe` ib
|
|
|
|
ib <> he `shouldBe` he
|
|
ib <> wm `shouldBe` ib
|
|
ib <> nf `shouldBe` ib
|
|
|
|
it "HE > IB > WrongMethod > NF" $ do
|
|
he <> wm `shouldBe` he
|
|
ib <> wm `shouldBe` ib
|
|
nf <> wm `shouldBe` wm
|
|
|
|
wm <> he `shouldBe` he
|
|
wm <> ib `shouldBe` ib
|
|
wm <> nf `shouldBe` wm
|
|
|
|
it "* > NotFound" $ do
|
|
he <> nf `shouldBe` he
|
|
ib <> nf `shouldBe` ib
|
|
wm <> nf `shouldBe` wm
|
|
|
|
nf <> he `shouldBe` he
|
|
nf <> ib `shouldBe` ib
|
|
nf <> wm `shouldBe` wm
|
|
|
|
routerSpec :: Spec
|
|
routerSpec = do
|
|
describe "Servant.Server.Internal.Router" $ do
|
|
let app' :: Application
|
|
app' = toApplication $ runRouter router'
|
|
|
|
router', router :: Router
|
|
router' = tweakResponse (twk <$>) router
|
|
router = LeafRouter $ \_ cont -> cont (RR . Right $ responseBuilder (Status 201 "") [] "")
|
|
|
|
twk :: Response -> Response
|
|
twk (ResponseBuilder (Status i s) hs b) = ResponseBuilder (Status (i + 1) s) hs b
|
|
twk b = b
|
|
|
|
describe "tweakResponse" . with (return app') $ do
|
|
it "calls f on route result" $ do
|
|
get "" `shouldRespondWith` 202
|
|
|
|
type MiscCombinatorsAPI
|
|
= "version" :> HttpVersion :> Get '[JSON] String
|
|
:<|> "secure" :> IsSecure :> Get '[JSON] String
|
|
:<|> "host" :> RemoteHost :> Get '[JSON] String
|
|
|
|
miscApi :: Proxy MiscCombinatorsAPI
|
|
miscApi = Proxy
|
|
|
|
miscServ :: Server MiscCombinatorsAPI
|
|
miscServ = versionHandler
|
|
:<|> secureHandler
|
|
:<|> hostHandler
|
|
|
|
where versionHandler = return . show
|
|
secureHandler Secure = return "secure"
|
|
secureHandler NotSecure = return "not secure"
|
|
hostHandler = return . show
|
|
|
|
miscReqCombinatorsSpec :: Spec
|
|
miscReqCombinatorsSpec = with (return $ serve miscApi miscServ) $
|
|
describe "Misc. combinators for request inspection" $ do
|
|
it "Successfully gets the HTTP version specified in the request" $
|
|
go "/version" "\"HTTP/1.0\""
|
|
|
|
it "Checks that hspec-wai uses HTTP, not HTTPS" $
|
|
go "/secure" "\"not secure\""
|
|
|
|
it "Checks that hspec-wai issues request from 0.0.0.0" $
|
|
go "/host" "\"0.0.0.0:0\""
|
|
|
|
where go path res = Test.Hspec.Wai.get path `shouldRespondWith` res
|