servant/servant-server/test/Servant/Server/Internal/ConfigSpec.hs

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2016-01-14 23:43:48 +01:00
{-# LANGUAGE DataKinds #-}
{-# OPTIONS_GHC -fdefer-type-errors #-}
module Servant.Server.Internal.ConfigSpec (spec) where
import Data.Proxy (Proxy (..))
import Test.Hspec (Spec, describe, it, shouldBe, pending, context)
import Test.ShouldNotTypecheck (shouldNotTypecheck)
import Servant.API
import Servant.Server.Internal.Config
spec :: Spec
spec = do
describe "getConfigEntry" $ do
it "gets the config if a matching one exists" $ do
let config = 'a' :. EmptyConfig
getConfigEntry config `shouldBe` 'a'
it "gets the first matching config" $ do
let config = 'a' :. 'b' :. EmptyConfig
getConfigEntry config `shouldBe` 'a'
it "does not typecheck if type does not exist" $ do
let config = 'a' :. EmptyConfig
x = getConfigEntry config :: Bool
shouldNotTypecheck x
context "Show instance" $ do
let config = 'a' :. True :. EmptyConfig
it "has a Show instance" $ do
show config `shouldBe` "'a' :. True :. EmptyConfig"
context "bracketing" $ do
it "works" $ do
show (Just config) `shouldBe` "Just ('a' :. True :. EmptyConfig)"
it "works with operators" $ do
let config = (1 :. 'a' :. EmptyConfig) :<|> ('b' :. True :. EmptyConfig)
show config `shouldBe` "(1 :. 'a' :. EmptyConfig) :<|> ('b' :. True :. EmptyConfig)"
describe "descendIntoNamedConfig" $ do
let config :: Config [Char, NamedConfig "sub" '[Char]]
config =
'a' :.
(NamedConfig subConfig :: NamedConfig "sub" '[Char])
:. EmptyConfig
subConfig = 'b' :. EmptyConfig
it "allows extracting subconfigs" $ do
descendIntoNamedConfig (Proxy :: Proxy "sub") config `shouldBe` subConfig
it "allows extracting entries from subconfigs" $ do
getConfigEntry (descendIntoNamedConfig (Proxy :: Proxy "sub") config :: Config '[Char])
`shouldBe` 'b'
it "does not typecheck if subConfig has the wrong type" $ do
let x = descendIntoNamedConfig (Proxy :: Proxy "sub") config :: Config '[Int]
shouldNotTypecheck (show x)
it "does not typecheck if subConfig with that name doesn't exist" $ do
let x = descendIntoNamedConfig (Proxy :: Proxy "foo") config :: Config '[Char]
shouldNotTypecheck (show x)