{-# LANGUAGE CPP #-} {-# LANGUAGE DataKinds #-} {-# LANGUAGE DeriveGeneric #-} {-# LANGUAGE FlexibleInstances #-} {-# LANGUAGE OverloadedStrings #-} {-# LANGUAGE ScopedTypeVariables #-} {-# LANGUAGE TypeOperators #-} {-# LANGUAGE TypeSynonymInstances #-} {-# LANGUAGE FlexibleInstances #-} module Servant.ServerSpec where #if !MIN_VERSION_base(4,8,0) import Control.Applicative ((<$>)) #endif import Control.Monad (forM_, when) import Control.Monad.Trans.Except (ExceptT, throwE) import Data.Aeson (FromJSON, ToJSON, decode', encode) import Data.ByteString.Conversion () import Data.Char (toUpper) import Data.Proxy (Proxy (Proxy)) import Data.String (fromString) import Data.String.Conversions (cs) import qualified Data.Text as T import GHC.Generics (Generic) import Network.HTTP.Types (hAccept, hContentType, methodDelete, methodGet, methodHead, methodPatch, methodPost, methodPut, ok200, parseQuery, Status(..)) import Network.Wai (Application, Request, pathInfo, queryString, rawQueryString, responseLBS, responseBuilder) import Network.Wai.Internal (Response(ResponseBuilder)) import Network.Wai.Test (defaultRequest, request, runSession, simpleBody) import Servant.API ((:<|>) (..), (:>), Capture, Delete, Get, Header (..), Headers, HttpVersion, IsSecure (..), JSON, Patch, PlainText, Post, Put, QueryFlag, QueryParam, QueryParams, Raw, RemoteHost, ReqBody, addHeader) import Servant.Server (Server, serve, ServantErr(..), err404) import Test.Hspec (Spec, describe, it, shouldBe) import Test.Hspec.Wai (get, liftIO, matchHeaders, matchStatus, post, request, shouldRespondWith, with, (<:>)) import Servant.Server.Internal.RoutingApplication (toApplication, RouteResult(..)) import Servant.Server.Internal.Router (tweakResponse, runRouter, Router, Router'(LeafRouter)) -- * test data types data Person = Person { name :: String, age :: Integer } deriving (Eq, Show, Generic) instance ToJSON Person instance FromJSON Person alice :: Person alice = Person "Alice" 42 data Animal = Animal { species :: String, numberOfLegs :: Integer } deriving (Eq, Show, Generic) instance ToJSON Animal instance FromJSON Animal jerry :: Animal jerry = Animal "Mouse" 4 tweety :: Animal tweety = Animal "Bird" 2 -- * specs spec :: Spec spec = do captureSpec getSpec headSpec postSpec putSpec patchSpec queryParamSpec headerSpec rawSpec unionSpec routerSpec responseHeadersSpec miscReqCombinatorsSpec type CaptureApi = Capture "legs" Integer :> Get '[JSON] Animal captureApi :: Proxy CaptureApi captureApi = Proxy captureServer :: Integer -> ExceptT ServantErr IO Animal captureServer legs = case legs of 4 -> return jerry 2 -> return tweety _ -> throwE err404 captureSpec :: Spec captureSpec = do describe "Servant.API.Capture" $ do with (return (serve captureApi captureServer)) $ do it "can capture parts of the 'pathInfo'" $ do response <- get "/2" liftIO $ decode' (simpleBody response) `shouldBe` Just tweety it "returns 404 if the decoding fails" $ do get "/notAnInt" `shouldRespondWith` 404 with (return (serve (Proxy :: Proxy (Capture "captured" String :> Raw)) (\ "captured" request_ respond -> respond $ responseLBS ok200 [] (cs $ show $ pathInfo request_)))) $ do it "strips the captured path snippet from pathInfo" $ do get "/captured/foo" `shouldRespondWith` (fromString (show ["foo" :: String])) type GetApi = Get '[JSON] Person :<|> "empty" :> Get '[JSON] () :<|> "emptyWithHeaders" :> Get '[JSON] (Headers '[Header "H" Int] ()) :<|> "post" :> Post '[JSON] () getApi :: Proxy GetApi getApi = Proxy getSpec :: Spec getSpec = do describe "Servant.API.Get" $ do let server = return alice :<|> return () :<|> return (addHeader 5 ()) :<|> return () with (return $ serve getApi server) $ do it "allows to GET a Person" $ do response <- get "/" return response `shouldRespondWith` 200 liftIO $ decode' (simpleBody response) `shouldBe` Just alice it "throws 405 (wrong method) on POSTs" $ do post "/" "" `shouldRespondWith` 405 post "/empty" "" `shouldRespondWith` 405 it "returns headers" $ do get "/emptyWithHeaders" `shouldRespondWith` 200 { matchHeaders = [ "H" <:> "5" ] } it "returns 406 if the Accept header is not supported" $ do Test.Hspec.Wai.request methodGet "" [(hAccept, "crazy/mime")] "" `shouldRespondWith` 406 headSpec :: Spec headSpec = do describe "Servant.API.Head" $ do let server = return alice :<|> return () :<|> return (addHeader 5 ()) :<|> return () with (return $ serve getApi server) $ do it "allows to GET a Person" $ do response <- Test.Hspec.Wai.request methodHead "/" [] "" return response `shouldRespondWith` 200 liftIO $ decode' (simpleBody response) `shouldBe` (Nothing :: Maybe Person) it "does not allow HEAD to POST route" $ do response <- Test.Hspec.Wai.request methodHead "/post" [] "" return response `shouldRespondWith` 405 it "throws 405 (wrong method) on POSTs" $ do post "/" "" `shouldRespondWith` 405 post "/empty" "" `shouldRespondWith` 405 it "returns 406 if the Accept header is not supported" $ do Test.Hspec.Wai.request methodHead "" [(hAccept, "crazy/mime")] "" `shouldRespondWith` 406 type QueryParamApi = QueryParam "name" String :> Get '[JSON] Person :<|> "a" :> QueryParams "names" String :> Get '[JSON] Person :<|> "b" :> QueryFlag "capitalize" :> Get '[JSON] Person queryParamApi :: Proxy QueryParamApi queryParamApi = Proxy qpServer :: Server QueryParamApi qpServer = queryParamServer :<|> qpNames :<|> qpCapitalize where qpNames (_:name2:_) = return alice { name = name2 } qpNames _ = return alice qpCapitalize False = return alice qpCapitalize True = return alice { name = map toUpper (name alice) } queryParamServer (Just name_) = return alice{name = name_} queryParamServer Nothing = return alice queryParamSpec :: Spec queryParamSpec = do describe "Servant.API.QueryParam" $ do it "allows to retrieve simple GET parameters" $ (flip runSession) (serve queryParamApi qpServer) $ do let params1 = "?name=bob" response1 <- Network.Wai.Test.request defaultRequest{ rawQueryString = params1, queryString = parseQuery params1 } liftIO $ do decode' (simpleBody response1) `shouldBe` Just alice{ name = "bob" } it "allows to retrieve lists in GET parameters" $ (flip runSession) (serve queryParamApi qpServer) $ do let params2 = "?names[]=bob&names[]=john" response2 <- Network.Wai.Test.request defaultRequest{ rawQueryString = params2, queryString = parseQuery params2, pathInfo = ["a"] } liftIO $ decode' (simpleBody response2) `shouldBe` Just alice{ name = "john" } it "allows to retrieve value-less GET parameters" $ (flip runSession) (serve queryParamApi qpServer) $ do let params3 = "?capitalize" response3 <- Network.Wai.Test.request defaultRequest{ rawQueryString = params3, queryString = parseQuery params3, pathInfo = ["b"] } liftIO $ decode' (simpleBody response3) `shouldBe` Just alice{ name = "ALICE" } let params3' = "?capitalize=" response3' <- Network.Wai.Test.request defaultRequest{ rawQueryString = params3', queryString = parseQuery params3', pathInfo = ["b"] } liftIO $ decode' (simpleBody response3') `shouldBe` Just alice{ name = "ALICE" } let params3'' = "?unknown=" response3'' <- Network.Wai.Test.request defaultRequest{ rawQueryString = params3'', queryString = parseQuery params3'', pathInfo = ["b"] } liftIO $ decode' (simpleBody response3'') `shouldBe` Just alice{ name = "Alice" } type PostApi = ReqBody '[JSON] Person :> Post '[JSON] Integer :<|> "bla" :> ReqBody '[JSON] Person :> Post '[JSON] Integer :<|> "empty" :> Post '[JSON] () postApi :: Proxy PostApi postApi = Proxy postSpec :: Spec postSpec = do describe "Servant.API.Post and .ReqBody" $ do let server = return . age :<|> return . age :<|> return () with (return $ serve postApi server) $ do let post' x = Test.Hspec.Wai.request methodPost x [(hContentType , "application/json;charset=utf-8")] it "allows to POST a Person" $ do post' "/" (encode alice) `shouldRespondWith` "42"{ matchStatus = 200 } it "allows alternative routes if all have request bodies" $ do post' "/bla" (encode alice) `shouldRespondWith` "42"{ matchStatus = 200 } it "handles trailing '/' gracefully" $ do post' "/bla/" (encode alice) `shouldRespondWith` "42"{ matchStatus = 200 } it "correctly rejects invalid request bodies with status 400" $ do post' "/" "some invalid body" `shouldRespondWith` 400 it "responds with 415 if the request body media type is unsupported" $ do let post'' x = Test.Hspec.Wai.request methodPost x [(hContentType , "application/nonsense")] post'' "/" "anything at all" `shouldRespondWith` 415 type PutApi = ReqBody '[JSON] Person :> Put '[JSON] Integer :<|> "bla" :> ReqBody '[JSON] Person :> Put '[JSON] Integer :<|> "empty" :> Put '[JSON] () putApi :: Proxy PutApi putApi = Proxy putSpec :: Spec putSpec = do describe "Servant.API.Put and .ReqBody" $ do let server = return . age :<|> return . age :<|> return () with (return $ serve putApi server) $ do let put' x = Test.Hspec.Wai.request methodPut x [(hContentType , "application/json;charset=utf-8")] it "allows to put a Person" $ do put' "/" (encode alice) `shouldRespondWith` "42"{ matchStatus = 200 } it "allows alternative routes if all have request bodies" $ do put' "/bla" (encode alice) `shouldRespondWith` "42"{ matchStatus = 200 } it "handles trailing '/' gracefully" $ do put' "/bla/" (encode alice) `shouldRespondWith` "42"{ matchStatus = 200 } it "correctly rejects invalid request bodies with status 400" $ do put' "/" "some invalid body" `shouldRespondWith` 400 it "responds with 415 if the request body media type is unsupported" $ do let put'' x = Test.Hspec.Wai.request methodPut x [(hContentType , "application/nonsense")] put'' "/" "anything at all" `shouldRespondWith` 415 type PatchApi = ReqBody '[JSON] Person :> Patch '[JSON] Integer :<|> "bla" :> ReqBody '[JSON] Person :> Patch '[JSON] Integer :<|> "empty" :> Patch '[JSON] () patchApi :: Proxy PatchApi patchApi = Proxy patchSpec :: Spec patchSpec = do describe "Servant.API.Patch and .ReqBody" $ do let server = return . age :<|> return . age :<|> return () with (return $ serve patchApi server) $ do let patch' x = Test.Hspec.Wai.request methodPatch x [(hContentType , "application/json;charset=utf-8")] it "allows to patch a Person" $ do patch' "/" (encode alice) `shouldRespondWith` "42"{ matchStatus = 200 } it "allows alternative routes if all have request bodies" $ do patch' "/bla" (encode alice) `shouldRespondWith` "42"{ matchStatus = 200 } it "handles trailing '/' gracefully" $ do patch' "/bla/" (encode alice) `shouldRespondWith` "42"{ matchStatus = 200 } it "correctly rejects invalid request bodies with status 400" $ do patch' "/" "some invalid body" `shouldRespondWith` 400 it "responds with 415 if the request body media type is unsupported" $ do let patch'' x = Test.Hspec.Wai.request methodPatch x [(hContentType , "application/nonsense")] patch'' "/" "anything at all" `shouldRespondWith` 415 type HeaderApi a = Header "MyHeader" a :> Delete '[JSON] () headerApi :: Proxy (HeaderApi a) headerApi = Proxy headerSpec :: Spec headerSpec = describe "Servant.API.Header" $ do let expectsInt :: Maybe Int -> ExceptT ServantErr IO () expectsInt (Just x) = when (x /= 5) $ error "Expected 5" expectsInt Nothing = error "Expected an int" let expectsString :: Maybe String -> ExceptT ServantErr IO () expectsString (Just x) = when (x /= "more from you") $ error "Expected more from you" expectsString Nothing = error "Expected a string" with (return (serve headerApi expectsInt)) $ do let delete' x = Test.Hspec.Wai.request methodDelete x [("MyHeader", "5")] it "passes the header to the handler (Int)" $ delete' "/" "" `shouldRespondWith` 200 with (return (serve headerApi expectsString)) $ do let delete' x = Test.Hspec.Wai.request methodDelete x [("MyHeader", "more from you")] it "passes the header to the handler (String)" $ delete' "/" "" `shouldRespondWith` 200 type RawApi = "foo" :> Raw rawApi :: Proxy RawApi rawApi = Proxy rawApplication :: Show a => (Request -> a) -> Application rawApplication f request_ respond = respond $ responseLBS ok200 [] (cs $ show $ f request_) rawSpec :: Spec rawSpec = do describe "Servant.API.Raw" $ do it "runs applications" $ do (flip runSession) (serve rawApi (rawApplication (const (42 :: Integer)))) $ do response <- Network.Wai.Test.request defaultRequest{ pathInfo = ["foo"] } liftIO $ do simpleBody response `shouldBe` "42" it "gets the pathInfo modified" $ do (flip runSession) (serve rawApi (rawApplication pathInfo)) $ do response <- Network.Wai.Test.request defaultRequest{ pathInfo = ["foo", "bar"] } liftIO $ do simpleBody response `shouldBe` cs (show ["bar" :: String]) type AlternativeApi = "foo" :> Get '[JSON] Person :<|> "bar" :> Get '[JSON] Animal :<|> "foo" :> Get '[PlainText] T.Text :<|> "bar" :> Post '[JSON] Animal :<|> "bar" :> Put '[JSON] Animal :<|> "bar" :> Delete '[JSON] () unionApi :: Proxy AlternativeApi unionApi = Proxy unionServer :: Server AlternativeApi unionServer = return alice :<|> return jerry :<|> return "a string" :<|> return jerry :<|> return jerry :<|> return () unionSpec :: Spec unionSpec = do describe "Servant.API.Alternative" $ do with (return $ serve unionApi unionServer) $ do it "unions endpoints" $ do response <- get "/foo" liftIO $ do decode' (simpleBody response) `shouldBe` Just alice response_ <- get "/bar" liftIO $ do decode' (simpleBody response_) `shouldBe` Just jerry it "checks all endpoints before returning 415" $ do get "/foo" `shouldRespondWith` 200 it "returns 404 if the path does not exist" $ do get "/nonexistent" `shouldRespondWith` 404 type ResponseHeadersApi = Get '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String) :<|> Post '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String) :<|> Put '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String) :<|> Patch '[JSON] (Headers '[Header "H1" Int, Header "H2" String] String) responseHeadersServer :: Server ResponseHeadersApi responseHeadersServer = let h = return $ addHeader 5 $ addHeader "kilroy" "hi" in h :<|> h :<|> h :<|> h responseHeadersSpec :: Spec responseHeadersSpec = describe "ResponseHeaders" $ do with (return $ serve (Proxy :: Proxy ResponseHeadersApi) responseHeadersServer) $ do let methods = [(methodGet, 200), (methodPost, 200), (methodPut, 200), (methodPatch, 200)] it "includes the headers in the response" $ forM_ methods $ \(method, expected) -> Test.Hspec.Wai.request method "/" [] "" `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 406 if the Accept header is not supported" $ forM_ methods $ \(method,_) -> Test.Hspec.Wai.request method "" [(hAccept, "crazy/mime")] "" `shouldRespondWith` 406 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 (Route $ 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