servant/servant-client/test/Servant/ClientSpec.hs

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{-# LANGUAGE CPP #-}
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{-# LANGUAGE ConstraintKinds #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE FunctionalDependencies #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE StandaloneDeriving #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE UndecidableInstances #-}
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#if __GLASGOW_HASKELL__ >= 800
{-# OPTIONS_GHC -freduction-depth=100 #-}
#else
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{-# OPTIONS_GHC -fcontext-stack=100 #-}
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#endif
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{-# OPTIONS_GHC -fno-warn-orphans #-}
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{-# OPTIONS_GHC -fno-warn-name-shadowing #-}
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#include "overlapping-compat.h"
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module Servant.ClientSpec (spec, Person(..), startWaiApp, endWaiApp) where
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import Prelude ()
import Prelude.Compat
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import Control.Arrow (left)
import Control.Concurrent (ThreadId, forkIO,
killThread)
import Control.Exception (bracket)
import Control.Monad.Error.Class (throwError)
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import Data.Aeson
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import Data.Char (chr, isPrint)
import Data.Foldable (forM_)
import Data.Monoid hiding (getLast)
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import Data.Proxy
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import qualified Generics.SOP as SOP
import GHC.Generics (Generic)
import qualified Network.HTTP.Client as C
import qualified Network.HTTP.Types as HTTP
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import Network.Socket
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import qualified Network.Wai as Wai
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import Network.Wai.Handler.Warp
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import System.IO.Unsafe (unsafePerformIO)
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import Test.Hspec
import Test.Hspec.QuickCheck
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import Test.HUnit
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import Test.QuickCheck
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import Web.FormUrlEncoded (FromForm, ToForm)
import Servant.API ((:<|>) ((:<|>)),
(:>), AuthProtect,
BasicAuth,
BasicAuthData (..),
Capture,
CaptureAll, Delete,
DeleteNoContent,
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EmptyAPI, addHeader,
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FormUrlEncoded,
Get, Header,
Headers, JSON,
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NoContent (NoContent),
Post, Put, Raw,
QueryFlag,
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QueryParam,
QueryParams,
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ReqBody,
getHeaders)
import Servant.API.Internal.Test.ComprehensiveAPI
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import Servant.Client
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import qualified Servant.Client.Core.Internal.Request as Req
import qualified Servant.Client.Core.Internal.Auth as Auth
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import Servant.Server
import Servant.Server.Experimental.Auth
-- This declaration simply checks that all instances are in place.
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_ = client comprehensiveAPI
spec :: Spec
spec = describe "Servant.Client" $ do
sucessSpec
failSpec
wrappedApiSpec
basicAuthSpec
genAuthSpec
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genericClientSpec
-- * test data types
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data Person = Person
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{ _name :: String
, _age :: Integer
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} deriving (Eq, Show, Generic)
instance ToJSON Person
instance FromJSON Person
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instance ToForm Person
instance FromForm Person
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alice :: Person
alice = Person "Alice" 42
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type TestHeaders = '[Header "X-Example1" Int, Header "X-Example2" String]
type Api =
"get" :> Get '[JSON] Person
:<|> "deleteEmpty" :> DeleteNoContent '[JSON] NoContent
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:<|> "capture" :> Capture "name" String :> Get '[JSON,FormUrlEncoded] Person
:<|> "captureAll" :> CaptureAll "names" String :> Get '[JSON] [Person]
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:<|> "body" :> ReqBody '[FormUrlEncoded,JSON] Person :> Post '[JSON] Person
:<|> "param" :> QueryParam "name" String :> Get '[FormUrlEncoded,JSON] Person
:<|> "params" :> QueryParams "names" String :> Get '[JSON] [Person]
:<|> "flag" :> QueryFlag "flag" :> Get '[JSON] Bool
:<|> "rawSuccess" :> Raw
:<|> "rawFailure" :> Raw
:<|> "multiple" :>
Capture "first" String :>
QueryParam "second" Int :>
QueryFlag "third" :>
ReqBody '[JSON] [(String, [Rational])] :>
Get '[JSON] (String, Maybe Int, Bool, [(String, [Rational])])
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:<|> "headers" :> Get '[JSON] (Headers TestHeaders Bool)
:<|> "deleteContentType" :> DeleteNoContent '[JSON] NoContent
:<|> "empty" :> EmptyAPI
api :: Proxy Api
api = Proxy
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getGet :: ClientM Person
getDeleteEmpty :: ClientM NoContent
getCapture :: String -> ClientM Person
getCaptureAll :: [String] -> ClientM [Person]
getBody :: Person -> ClientM Person
getQueryParam :: Maybe String -> ClientM Person
getQueryParams :: [String] -> ClientM [Person]
getQueryFlag :: Bool -> ClientM Bool
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getRawSuccess :: HTTP.Method -> ClientM Response
getRawFailure :: HTTP.Method -> ClientM Response
getMultiple :: String -> Maybe Int -> Bool -> [(String, [Rational])]
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-> ClientM (String, Maybe Int, Bool, [(String, [Rational])])
getRespHeaders :: ClientM (Headers TestHeaders Bool)
getDeleteContentType :: ClientM NoContent
getGet
:<|> getDeleteEmpty
:<|> getCapture
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:<|> getCaptureAll
:<|> getBody
:<|> getQueryParam
:<|> getQueryParams
:<|> getQueryFlag
:<|> getRawSuccess
:<|> getRawFailure
:<|> getMultiple
:<|> getRespHeaders
:<|> getDeleteContentType
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:<|> EmptyClient = client api
server :: Application
server = serve api (
return alice
:<|> return NoContent
:<|> (\ name -> return $ Person name 0)
:<|> (\ names -> return (zipWith Person names [0..]))
:<|> return
:<|> (\ name -> case name of
Just "alice" -> return alice
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Just n -> throwError $ ServantErr 400 (n ++ " not found") "" []
Nothing -> throwError $ ServantErr 400 "missing parameter" "" [])
:<|> (\ names -> return (zipWith Person names [0..]))
:<|> return
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:<|> (Tagged $ \ _request respond -> respond $ Wai.responseLBS HTTP.ok200 [] "rawSuccess")
:<|> (Tagged $ \ _request respond -> respond $ Wai.responseLBS HTTP.badRequest400 [] "rawFailure")
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:<|> (\ a b c d -> return (a, b, c, d))
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:<|> (return $ addHeader 1729 $ addHeader "eg2" True)
:<|> return NoContent
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:<|> emptyServer)
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type FailApi =
"get" :> Raw
:<|> "capture" :> Capture "name" String :> Raw
:<|> "body" :> Raw
failApi :: Proxy FailApi
failApi = Proxy
failServer :: Application
failServer = serve failApi (
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(Tagged $ \ _request respond -> respond $ Wai.responseLBS HTTP.ok200 [] "")
:<|> (\ _capture -> Tagged $ \_request respond -> respond $ Wai.responseLBS HTTP.ok200 [("content-type", "application/json")] "")
:<|> (Tagged $ \_request respond -> respond $ Wai.responseLBS HTTP.ok200 [("content-type", "fooooo")] "")
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)
-- * basic auth stuff
type BasicAuthAPI =
BasicAuth "foo-realm" () :> "private" :> "basic" :> Get '[JSON] Person
basicAuthAPI :: Proxy BasicAuthAPI
basicAuthAPI = Proxy
basicAuthHandler :: BasicAuthCheck ()
basicAuthHandler =
let check (BasicAuthData username password) =
if username == "servant" && password == "server"
then return (Authorized ())
else return Unauthorized
in BasicAuthCheck check
basicServerContext :: Context '[ BasicAuthCheck () ]
basicServerContext = basicAuthHandler :. EmptyContext
basicAuthServer :: Application
basicAuthServer = serveWithContext basicAuthAPI basicServerContext (const (return alice))
-- * general auth stuff
type GenAuthAPI =
AuthProtect "auth-tag" :> "private" :> "auth" :> Get '[JSON] Person
genAuthAPI :: Proxy GenAuthAPI
genAuthAPI = Proxy
type instance AuthServerData (AuthProtect "auth-tag") = ()
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type instance Auth.AuthClientData (AuthProtect "auth-tag") = ()
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genAuthHandler :: AuthHandler Wai.Request ()
genAuthHandler =
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let handler req = case lookup "AuthHeader" (Wai.requestHeaders req) of
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Nothing -> throwError (err401 { errBody = "Missing auth header" })
Just _ -> return ()
in mkAuthHandler handler
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genAuthServerContext :: Context '[ AuthHandler Wai.Request () ]
genAuthServerContext = genAuthHandler :. EmptyContext
genAuthServer :: Application
genAuthServer = serveWithContext genAuthAPI genAuthServerContext (const (return alice))
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-- * generic client stuff
type GenericClientAPI
= QueryParam "sqr" Int :> Get '[JSON] Int
:<|> Capture "foo" String :> NestedAPI1
data GenericClient = GenericClient
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{ getSqr :: Maybe Int -> ClientM Int
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, mkNestedClient1 :: String -> NestedClient1
} deriving Generic
instance SOP.Generic GenericClient
instance (Client ClientM GenericClientAPI ~ client) => ClientLike client GenericClient
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type NestedAPI1
= QueryParam "int" Int :> NestedAPI2
:<|> QueryParam "id" Char :> Get '[JSON] Char
data NestedClient1 = NestedClient1
{ mkNestedClient2 :: Maybe Int -> NestedClient2
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, idChar :: Maybe Char -> ClientM Char
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} deriving Generic
instance SOP.Generic NestedClient1
instance (Client ClientM NestedAPI1 ~ client) => ClientLike client NestedClient1
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type NestedAPI2
= "sum" :> Capture "first" Int :> Capture "second" Int :> Get '[JSON] Int
:<|> "void" :> Post '[JSON] ()
data NestedClient2 = NestedClient2
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{ getSum :: Int -> Int -> ClientM Int
, doNothing :: ClientM ()
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} deriving Generic
instance SOP.Generic NestedClient2
instance (Client ClientM NestedAPI2 ~ client) => ClientLike client NestedClient2
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genericClientServer :: Application
genericClientServer = serve (Proxy :: Proxy GenericClientAPI) (
(\ mx -> case mx of
Just x -> return (x*x)
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Nothing -> throwError $ ServantErr 400 "missing parameter" "" []
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)
:<|> nestedServer1
)
where
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nestedServer1 _str = nestedServer2 :<|> (maybe (throwError $ ServantErr 400 "missing parameter" "" []) return)
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nestedServer2 _int = (\ x y -> return (x + y)) :<|> return ()
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{-# NOINLINE manager' #-}
manager' :: C.Manager
manager' = unsafePerformIO $ C.newManager C.defaultManagerSettings
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runClient :: ClientM a -> BaseUrl -> IO (Either ServantError a)
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runClient x baseUrl' = runClientM x (ClientEnv manager' baseUrl')
sucessSpec :: Spec
sucessSpec = beforeAll (startWaiApp server) $ afterAll endWaiApp $ do
it "Servant.API.Get" $ \(_, baseUrl) -> do
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left show <$> runClient getGet baseUrl `shouldReturn` Right alice
describe "Servant.API.Delete" $ do
it "allows empty content type" $ \(_, baseUrl) -> do
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left show <$> runClient getDeleteEmpty baseUrl `shouldReturn` Right NoContent
it "allows content type" $ \(_, baseUrl) -> do
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left show <$> runClient getDeleteContentType baseUrl `shouldReturn` Right NoContent
it "Servant.API.Capture" $ \(_, baseUrl) -> do
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left show <$> runClient (getCapture "Paula") baseUrl `shouldReturn` Right (Person "Paula" 0)
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it "Servant.API.CaptureAll" $ \(_, baseUrl) -> do
let expected = [(Person "Paula" 0), (Person "Peta" 1)]
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left show <$> runClient (getCaptureAll ["Paula", "Peta"]) baseUrl `shouldReturn` Right expected
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it "Servant.API.ReqBody" $ \(_, baseUrl) -> do
let p = Person "Clara" 42
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left show <$> runClient (getBody p) baseUrl `shouldReturn` Right p
it "Servant.API.QueryParam" $ \(_, baseUrl) -> do
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left show <$> runClient (getQueryParam (Just "alice")) baseUrl `shouldReturn` Right alice
Left (FailureResponse r) <- runClient (getQueryParam (Just "bob")) baseUrl
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responseStatusCode r `shouldBe` HTTP.Status 400 "bob not found"
it "Servant.API.QueryParam.QueryParams" $ \(_, baseUrl) -> do
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left show <$> runClient (getQueryParams []) baseUrl `shouldReturn` Right []
left show <$> runClient (getQueryParams ["alice", "bob"]) baseUrl
`shouldReturn` Right [Person "alice" 0, Person "bob" 1]
context "Servant.API.QueryParam.QueryFlag" $
forM_ [False, True] $ \ flag -> it (show flag) $ \(_, baseUrl) -> do
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left show <$> runClient (getQueryFlag flag) baseUrl `shouldReturn` Right flag
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it "Servant.API.Raw on success" $ \(_, baseUrl) -> do
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res <- runClient (getRawSuccess HTTP.methodGet) baseUrl
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case res of
Left e -> assertFailure $ show e
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Right r -> do
responseStatusCode r `shouldBe` HTTP.status200
responseBody r `shouldBe` "rawSuccess"
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it "Servant.API.Raw should return a Left in case of failure" $ \(_, baseUrl) -> do
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res <- runClient (getRawFailure HTTP.methodGet) baseUrl
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case res of
Right _ -> assertFailure "expected Left, but got Right"
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Left (FailureResponse r) -> do
responseStatusCode r `shouldBe` HTTP.status400
responseBody r `shouldBe` "rawFailure"
Left e -> assertFailure $ "expected FailureResponse, but got " ++ show e
it "Returns headers appropriately" $ \(_, baseUrl) -> do
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res <- runClient getRespHeaders baseUrl
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case res of
Left e -> assertFailure $ show e
Right val -> getHeaders val `shouldBe` [("X-Example1", "1729"), ("X-Example2", "eg2")]
modifyMaxSuccess (const 20) $ do
it "works for a combination of Capture, QueryParam, QueryFlag and ReqBody" $ \(_, baseUrl) ->
property $ forAllShrink pathGen shrink $ \(NonEmpty cap) num flag body ->
ioProperty $ do
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result <- left show <$> runClient (getMultiple cap num flag body) baseUrl
return $
result === Right (cap, num, flag, body)
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wrappedApiSpec :: Spec
wrappedApiSpec = describe "error status codes" $ do
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let serveW api = serve api $ throwError $ ServantErr 500 "error message" "" []
context "are correctly handled by the client" $
let test :: (WrappedApi, String) -> Spec
test (WrappedApi api, desc) =
it desc $ bracket (startWaiApp $ serveW api) endWaiApp $ \(_, baseUrl) -> do
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let getResponse :: ClientM ()
getResponse = client api
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Left (FailureResponse r) <- runClient getResponse baseUrl
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responseStatusCode r `shouldBe` (HTTP.Status 500 "error message")
in mapM_ test $
(WrappedApi (Proxy :: Proxy (Delete '[JSON] ())), "Delete") :
(WrappedApi (Proxy :: Proxy (Get '[JSON] ())), "Get") :
(WrappedApi (Proxy :: Proxy (Post '[JSON] ())), "Post") :
(WrappedApi (Proxy :: Proxy (Put '[JSON] ())), "Put") :
[]
failSpec :: Spec
failSpec = beforeAll (startWaiApp failServer) $ afterAll endWaiApp $ do
context "client returns errors appropriately" $ do
it "reports FailureResponse" $ \(_, baseUrl) -> do
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let (_ :<|> getDeleteEmpty :<|> _) = client api
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Left res <- runClient getDeleteEmpty baseUrl
case res of
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FailureResponse r | responseStatusCode r == HTTP.status404 -> return ()
_ -> fail $ "expected 404 response, but got " <> show res
it "reports DecodeFailure" $ \(_, baseUrl) -> do
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let (_ :<|> _ :<|> getCapture :<|> _) = client api
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Left res <- runClient (getCapture "foo") baseUrl
case res of
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DecodeFailure _ _ -> return ()
_ -> fail $ "expected DecodeFailure, but got " <> show res
it "reports ConnectionError" $ \_ -> do
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let (getGetWrongHost :<|> _) = client api
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Left res <- runClient getGetWrongHost (BaseUrl Http "127.0.0.1" 19872 "")
case res of
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ConnectionError _ -> return ()
_ -> fail $ "expected ConnectionError, but got " <> show res
it "reports UnsupportedContentType" $ \(_, baseUrl) -> do
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let (getGet :<|> _ ) = client api
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Left res <- runClient getGet baseUrl
case res of
UnsupportedContentType ("application/octet-stream") _ -> return ()
_ -> fail $ "expected UnsupportedContentType, but got " <> show res
it "reports InvalidContentTypeHeader" $ \(_, baseUrl) -> do
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let (_ :<|> _ :<|> _ :<|> _ :<|> getBody :<|> _) = client api
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Left res <- runClient (getBody alice) baseUrl
case res of
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InvalidContentTypeHeader _ -> return ()
_ -> fail $ "expected InvalidContentTypeHeader, but got " <> show res
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data WrappedApi where
WrappedApi :: (HasServer (api :: *) '[], Server api ~ Handler a,
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HasClient ClientM api, Client ClientM api ~ ClientM ()) =>
Proxy api -> WrappedApi
basicAuthSpec :: Spec
basicAuthSpec = beforeAll (startWaiApp basicAuthServer) $ afterAll endWaiApp $ do
context "Authentication works when requests are properly authenticated" $ do
it "Authenticates a BasicAuth protected server appropriately" $ \(_,baseUrl) -> do
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let getBasic = client basicAuthAPI
let basicAuthData = BasicAuthData "servant" "server"
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left show <$> runClient (getBasic basicAuthData) baseUrl `shouldReturn` Right alice
context "Authentication is rejected when requests are not authenticated properly" $ do
it "Authenticates a BasicAuth protected server appropriately" $ \(_,baseUrl) -> do
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let getBasic = client basicAuthAPI
let basicAuthData = BasicAuthData "not" "password"
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Left (FailureResponse r) <- runClient (getBasic basicAuthData) baseUrl
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responseStatusCode r `shouldBe` HTTP.Status 403 "Forbidden"
genAuthSpec :: Spec
genAuthSpec = beforeAll (startWaiApp genAuthServer) $ afterAll endWaiApp $ do
context "Authentication works when requests are properly authenticated" $ do
it "Authenticates a AuthProtect protected server appropriately" $ \(_, baseUrl) -> do
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let getProtected = client genAuthAPI
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let authRequest = Auth.mkAuthenticatedRequest () (\_ req -> Req.addHeader "AuthHeader" ("cool" :: String) req)
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left show <$> runClient (getProtected authRequest) baseUrl `shouldReturn` Right alice
context "Authentication is rejected when requests are not authenticated properly" $ do
it "Authenticates a AuthProtect protected server appropriately" $ \(_, baseUrl) -> do
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let getProtected = client genAuthAPI
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let authRequest = Auth.mkAuthenticatedRequest () (\_ req -> Req.addHeader "Wrong" ("header" :: String) req)
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Left (FailureResponse r) <- runClient (getProtected authRequest) baseUrl
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responseStatusCode r `shouldBe` (HTTP.Status 401 "Unauthorized")
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genericClientSpec :: Spec
genericClientSpec = beforeAll (startWaiApp genericClientServer) $ afterAll endWaiApp $ do
describe "Servant.Client.Generic" $ do
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let GenericClient{..} = mkClient (client (Proxy :: Proxy GenericClientAPI))
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NestedClient1{..} = mkNestedClient1 "example"
NestedClient2{..} = mkNestedClient2 (Just 42)
it "works for top-level client inClientM function" $ \(_, baseUrl) -> do
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left show <$> runClient (getSqr (Just 5)) baseUrl `shouldReturn` Right 25
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it "works for nested clients" $ \(_, baseUrl) -> do
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left show <$> runClient (idChar (Just 'c')) baseUrl `shouldReturn` Right 'c'
left show <$> runClient (getSum 3 4) baseUrl `shouldReturn` Right 7
left show <$> runClient doNothing baseUrl `shouldReturn` Right ()
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-- * utils
startWaiApp :: Application -> IO (ThreadId, BaseUrl)
startWaiApp app = do
(port, socket) <- openTestSocket
let settings = setPort port $ defaultSettings
thread <- forkIO $ runSettingsSocket settings socket app
return (thread, BaseUrl Http "localhost" port "")
endWaiApp :: (ThreadId, BaseUrl) -> IO ()
endWaiApp (thread, _) = killThread thread
openTestSocket :: IO (Port, Socket)
openTestSocket = do
s <- socket AF_INET Stream defaultProtocol
localhost <- inet_addr "127.0.0.1"
bind s (SockAddrInet aNY_PORT localhost)
listen s 1
port <- socketPort s
return (fromIntegral port, s)
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pathGen :: Gen (NonEmptyList Char)
pathGen = fmap NonEmpty path
where
path = listOf1 $ elements $
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filter (not . (`elem` ("?%[]/#;" :: String))) $
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filter isPrint $
map chr [0..127]