427 lines
13 KiB
Haskell
427 lines
13 KiB
Haskell
{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE QuasiQuotes #-}
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{-# LANGUAGE ScopedTypeVariables #-}
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{-# LANGUAGE TypeOperators #-}
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module Servant.ServerSpec where
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import Control.Monad.Trans.Either (EitherT, left)
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import Data.Aeson (ToJSON, FromJSON, encode, decode')
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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 GHC.Generics (Generic)
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import Network.HTTP.Types (parseQuery, ok200, status409, methodPost, hContentType)
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import Network.Wai ( Application, Request, responseLBS, pathInfo
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, queryString, rawQueryString )
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import Network.Wai.Test (runSession, defaultRequest, simpleBody, request)
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import Test.Hspec (Spec, describe, it, shouldBe)
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import Test.Hspec.Wai ( liftIO, with, get, post, shouldRespondWith
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, matchStatus, request )
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import Servant.API (JSON)
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import Servant.API.Capture (Capture)
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import Servant.API.Get (Get)
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import Servant.API.ReqBody (ReqBody)
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import Servant.API.Post (Post)
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import Servant.API.QueryParam (QueryParam, QueryParams, QueryFlag)
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import Servant.API.MatrixParam (MatrixParam, MatrixParams, MatrixFlag)
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import Servant.API.Raw (Raw)
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import Servant.API.Sub ((:>))
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import Servant.API.Alternative ((:<|>)((:<|>)))
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import Servant.Server (Server, serve)
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import Servant.Server.Internal (RouteMismatch(..))
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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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queryParamSpec
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matrixParamSpec
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postSpec
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rawSpec
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unionSpec
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errorsSpec
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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 -> EitherT (Int, String) 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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_ -> left (404, "not found")
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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 $ do
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decode' (simpleBody response) `shouldBe` Just tweety
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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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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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with (return (serve getApi (return alice))) $ 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 $ do
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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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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 MatrixParamApi = "a" :> MatrixParam "name" String :> Get '[JSON] Person
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:<|> "b" :> MatrixParams "names" String :> "bsub" :> MatrixParams "names" String :> Get '[JSON] Person
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:<|> "c" :> MatrixFlag "capitalize" :> Get '[JSON] Person
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:<|> "d" :> Capture "foo" Integer :> MatrixParam "name" String :> MatrixFlag "capitalize" :> "dsub" :> Get '[JSON] Person
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matrixParamApi :: Proxy MatrixParamApi
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matrixParamApi = Proxy
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mpServer :: Server MatrixParamApi
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mpServer = matrixParamServer :<|> mpNames :<|> mpCapitalize alice :<|> mpComplex
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where mpNames (_:name2:_) _ = return alice { name = name2 }
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mpNames _ _ = return alice
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mpCapitalize p False = return p
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mpCapitalize p True = return p { name = map toUpper (name p) }
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matrixParamServer (Just name) = return alice{name = name}
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matrixParamServer Nothing = return alice
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mpAge age p = return p { age = age }
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mpComplex capture name cap = matrixParamServer name >>= flip mpCapitalize cap >>= mpAge capture
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matrixParamSpec :: Spec
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matrixParamSpec = do
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describe "Servant.API.MatrixParam" $ do
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it "allows to retrieve simple matrix parameters" $
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(flip runSession) (serve matrixParamApi mpServer) $ do
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response1 <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["a;name=bob"]
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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 matrix parameters" $
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(flip runSession) (serve matrixParamApi mpServer) $ do
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response2 <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["b;names=bob;names=john", "bsub;names=anna;names=sarah"]
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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 matrix parameters" $
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(flip runSession) (serve matrixParamApi mpServer) $ do
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response3 <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["c;capitalize"]
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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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response3' <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["c;capitalize="]
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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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it "allows to retrieve matrix parameters on captured segments" $
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(flip runSession) (serve matrixParamApi mpServer) $ do
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response4 <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["d", "12;name=stephen;capitalize", "dsub"]
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}
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liftIO $
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decode' (simpleBody response4) `shouldBe` Just alice{
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name = "STEPHEN",
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age = 12
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}
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response4' <- Network.Wai.Test.request defaultRequest{
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pathInfo = ["d;ignored=1", "5", "dsub"]
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}
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liftIO $
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decode' (simpleBody response4') `shouldBe` Just alice{
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name = "Alice",
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age = 5
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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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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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with (return (serve postApi (return . age :<|> return . age))) $ 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 "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 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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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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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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-- | Test server error functionality.
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errorsSpec :: Spec
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errorsSpec = do
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let he = HttpError status409 (Just "A custom error")
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let ib = InvalidBody "The body is invalid"
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let wm = WrongMethod
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let nf = NotFound
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describe "Servant.Server.Internal.RouteMismatch" $ do
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it "HttpError > *" $ do
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ib <> he `shouldBe` he
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wm <> he `shouldBe` he
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nf <> he `shouldBe` he
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he <> ib `shouldBe` he
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he <> wm `shouldBe` he
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he <> nf `shouldBe` he
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it "HE > InvalidBody > (WM,NF)" $ do
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he <> ib `shouldBe` he
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wm <> ib `shouldBe` ib
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nf <> ib `shouldBe` ib
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ib <> he `shouldBe` he
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ib <> wm `shouldBe` ib
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ib <> nf `shouldBe` ib
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it "HE > IB > WrongMethod > NF" $ do
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he <> wm `shouldBe` he
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ib <> wm `shouldBe` ib
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nf <> wm `shouldBe` wm
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wm <> he `shouldBe` he
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wm <> ib `shouldBe` ib
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wm <> nf `shouldBe` wm
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it "* > NotFound" $ do
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he <> nf `shouldBe` he
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ib <> nf `shouldBe` ib
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wm <> nf `shouldBe` wm
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nf <> he `shouldBe` he
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nf <> ib `shouldBe` ib
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nf <> wm `shouldBe` wm
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