servant/servant-docs/test/Servant/DocsSpec.hs

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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveFunctor #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE GADTs #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE TypeSynonymInstances #-}
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{-# OPTIONS_GHC -fno-warn-orphans #-}
{-# OPTIONS_GHC -freduction-depth=100 #-}
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module Servant.DocsSpec where
import Control.Lens
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((&), (<>~))
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import Control.Monad
(unless)
import Control.Monad.Trans.Writer
(Writer, runWriter, tell)
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import Data.Aeson
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import Data.List
(isInfixOf)
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import Data.Proxy
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import Data.String.Conversions
(cs)
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import GHC.Generics
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import Prelude ()
import Prelude.Compat
import Test.Tasty
(TestName, TestTree, testGroup)
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import Test.Tasty.Golden
(goldenVsString)
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import Test.Tasty.HUnit
(Assertion, HasCallStack, assertFailure, testCase, (@?=))
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import Servant.API
import Servant.Docs.Internal
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import Servant.Test.ComprehensiveAPI
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-- * comprehensive api
-- This declaration simply checks that all instances are in place.
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comprehensiveDocs :: API
comprehensiveDocs = docs comprehensiveAPI
instance ToParam (QueryParam' mods "foo" Int) where
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toParam _ = DocQueryParam "foo" ["1","2","3"] "QueryParams Int" Normal
instance ToParam (QueryParam' mods "bar" Int) where
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toParam _ = DocQueryParam "bar" ["1","2","3"] "QueryParams Int" Normal
instance ToParam (QueryParams "foo" Int) where
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toParam _ = DocQueryParam "foo" ["1","2","3"] "QueryParams Int" List
instance ToParam (QueryFlag "foo") where
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toParam _ = DocQueryParam "foo" [] "QueryFlag" Flag
instance ToCapture (Capture "foo" Int) where
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toCapture _ = DocCapture "foo" "Capture foo Int"
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instance ToCapture (CaptureAll "foo" Int) where
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toCapture _ = DocCapture "foo" "Capture all foo Int"
instance ToFragment (Fragment Int) where
toFragment _ = DocFragment "foo" "Fragment Int"
-- * specs
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spec :: TestTree
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spec = describe "Servant.Docs" $ do
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golden "comprehensive API" "golden/comprehensive.md" (markdown comprehensiveDocs)
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describe "markdown" $ do
let md1 = markdown (docs (Proxy :: Proxy TestApi1))
tests1 md1
let md2 = markdown (docs (Proxy :: Proxy TestApi2))
tests2 md2
describe "markdown with extra info" $ do
let
extra = extraInfo
(Proxy :: Proxy (Get '[JSON, PlainText] (Headers '[Header "Location" String] Int)))
(defAction & notes <>~ [DocNote "Get an Integer" ["get an integer in Json or plain text"]])
<>
extraInfo
(Proxy :: Proxy (ReqBody '[JSON] String :> Post '[JSON] Datatype1))
(defAction & notes <>~ [DocNote "Post data" ["Posts some Json data"]])
md = markdown (docsWith defaultDocOptions [] extra (Proxy :: Proxy TestApi1))
tests1 md
it "contains the extra info provided" $ do
md `shouldContain` "Get an Integer"
md `shouldContain` "Post data"
md `shouldContain` "get an integer in Json or plain text"
md `shouldContain` "Posts some Json data"
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describe "tuple samples" $ do
it "looks like expected" $ do
(toSample (Proxy :: Proxy (TT, UT))) `shouldBe` Just (TT1,UT1)
(toSample (Proxy :: Proxy (TT, UT, UT))) `shouldBe` Just (TT1,UT1,UT1)
(toSamples (Proxy :: Proxy (TT, UT))) `shouldBe`
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[ ("eins, yks",(TT1,UT1)), ("eins, kaks",(TT1,UT2))
, ("zwei, yks",(TT2,UT1)), ("zwei, kaks",(TT2,UT2))
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]
(toSamples (Proxy :: Proxy (TT, UT, UT))) `shouldBe`
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[ ("eins, yks, yks",(TT1,UT1,UT1))
, ("eins, yks, kaks",(TT1,UT1,UT2))
, ("zwei, yks, yks",(TT2,UT1,UT1))
, ("eins, kaks, yks",(TT1,UT2,UT1))
, ("zwei, yks, kaks",(TT2,UT1,UT2))
, ("eins, kaks, kaks",(TT1,UT2,UT2))
, ("zwei, kaks, yks",(TT2,UT2,UT1))
, ("zwei, kaks, kaks",(TT2,UT2,UT2))
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]
where
tests1 md = do
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it "mentions supported content-types" $ do
md `shouldContain` "application/json"
md `shouldContain` "text/plain;charset=utf-8"
it "mentions status codes" $ do
md `shouldContain` "Status code 200"
it "has methods as section headers" $ do
md `shouldContain` "## POST"
md `shouldContain` "## GET"
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it "mentions headers" $ do
md `shouldContain` "- This endpoint is sensitive to the value of the **X-Test** HTTP header."
it "contains response samples - dt1field1" $
md `shouldContain` "\"dt1field1\":\"field 1\""
it "contains response samples - dt1field2" $
md `shouldContain` "\"dt1field2\":13"
it "contains request body samples" $
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md `shouldContain` "17"
it "does not generate any docs mentioning the 'empty-api' path" $
md `shouldNotContain` "empty-api"
tests2 md = do
it "mentions the content-types from both copies of the route" $ do
md `shouldContain` "application/json"
md `shouldContain` "text/plain;charset=utf-8"
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-- * APIs
data Datatype1 = Datatype1 { dt1field1 :: String
, dt1field2 :: Int
} deriving (Eq, Show, Generic)
instance ToJSON Datatype1
instance ToSample Datatype1 where
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toSamples _ = singleSample $ Datatype1 "field 1" 13
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instance ToSample Char where
toSamples _ = samples ['a'..'z']
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instance ToSample Int where
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toSamples _ = singleSample 17
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instance MimeRender PlainText Int where
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mimeRender _ = cs . show
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type TestApi1 = Get '[JSON, PlainText] (Headers '[Header "Location" String] Int)
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:<|> ReqBody '[JSON] String :> Post '[JSON] Datatype1
:<|> Header "X-Test" Int :> Put '[JSON] Int
:<|> "empty-api" :> EmptyAPI
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type TestApi2 = "duplicate-endpoint" :> Get '[JSON] Datatype1
:<|> "duplicate-endpoint" :> Get '[PlainText] Int
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data TT = TT1 | TT2 deriving (Show, Eq)
data UT = UT1 | UT2 deriving (Show, Eq)
instance ToSample TT where
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toSamples _ = [("eins", TT1), ("zwei", TT2)]
instance ToSample UT where
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toSamples _ = [("yks", UT1), ("kaks", UT2)]
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-------------------------------------------------------------------------------
-- HSpec like DSL for tasty
-------------------------------------------------------------------------------
newtype TestTreeM a = TestTreeM (Writer [TestTree] a)
deriving (Functor, Applicative, Monad)
runTestTreeM :: TestTreeM () -> [TestTree]
runTestTreeM (TestTreeM m) = snd (runWriter m)
class Describe r where
describe :: TestName -> TestTreeM () -> r
instance a ~ () => Describe (TestTreeM a) where
describe n t = TestTreeM $ tell [ describe n t ]
instance Describe TestTree where
describe n t = testGroup n $ runTestTreeM t
it :: TestName -> Assertion -> TestTreeM ()
it n assertion = TestTreeM $ tell [ testCase n assertion ]
shouldBe :: (Eq a, Show a, HasCallStack) => a -> a -> Assertion
shouldBe = (@?=)
shouldContain :: (Eq a, Show a, HasCallStack) => [a] -> [a] -> Assertion
shouldContain = compareWith (flip isInfixOf) "does not contain"
shouldNotContain :: (Eq a, Show a, HasCallStack) => [a] -> [a] -> Assertion
shouldNotContain = compareWith (\x y -> not (isInfixOf y x)) "contains"
compareWith :: (Show a, Show b, HasCallStack) => (a -> b -> Bool) -> String -> a -> b -> Assertion
compareWith f msg x y = unless (f x y) $ assertFailure $
show x ++ " " ++ msg ++ " " ++ show y
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golden :: TestName -> FilePath -> String -> TestTreeM ()
golden n fp contents = TestTreeM $ tell
[ goldenVsString n fp (return (cs contents)) ]