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Documentation improvements
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@ -6,14 +6,37 @@
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-- tested itself need not be implemented with @servant-server@ (or indeed,
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-- written in Haskell).
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--
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-- The documentation of the <#useful-preds Useful predicates> sections is
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-- meant to serve as a set of helpful pointers for learning more about best
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-- practices concerning REST APIs.
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module Servant.QuickCheck
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(
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-- * Test setup helpers
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-- | Helpers to setup and teardown @servant@ servers during tests.
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withServantServer
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-- * Property testing
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serverSatisfies
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-- ** Predicates
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-- *** #useful-preds# Useful predicates
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-- | The predicates below are often useful. Some check RFC compliance; some are
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-- best practice, and some are useful to check that APIs follow in-house
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-- best-practices. Included in the documentation for each is a list of
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-- references to any relevant RFCs and other links, as well as what type of
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-- predicate it is (__RFC Compliance__, __Best Practice__, __Optional__).
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--
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-- RFCs distinguish between the force of requirements (e.g. __MUST__ vs.
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-- __SHOULD__). __RFC Compliance__ includes any absolute requirements present
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-- in RFCs. The __Best Practices__ includes, in addition to RFC
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-- recommendations, recommendations found elsewhere or generally accepted.
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, not500
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, onlyJsonObjects
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, notAllowedContainsAllowHeader
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, unauthorizedContainsWWWAuthenticate
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, getsHaveCacheControlHeader
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, headsHaveCacheControlHeader
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-- *** Predicate utilities and types
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, (<%>)
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, Predicates
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, ResponsePredicate(..)
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, RequestPredicate(..)
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-- * Equality testing
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, serversEqual
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@ -28,19 +51,10 @@ module Servant.QuickCheck
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-- ** Response equality type
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, ResponseEquality(..)
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-- * Property testing
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, serverSatisfies
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-- ** Predicates
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-- *** Useful predicates
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, not500
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, onlyJsonObjects
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, notAllowedContainsAllowHeader
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, unauthorizedContainsWWWAuthenticate
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-- *** Predicate utilities and types
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, (<%>)
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, Predicates
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, ResponsePredicate(..)
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, RequestPredicate(..)
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-- * Test setup helpers
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-- | Helpers to setup and teardown @servant@ servers during tests.
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, withServantServer
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, withServantServerAndContext
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-- ** Re-exports
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, BaseUrl(..)
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@ -1,22 +1,28 @@
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{-# LANGUAGE MultiWayIf #-}
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module Servant.QuickCheck.Internal.Predicates where
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import Control.Monad
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import Data.Aeson (Object, decode)
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import Data.Bifunctor (Bifunctor (..))
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import qualified Data.ByteString.Lazy as LBS
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import qualified Data.ByteString as SBS
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import Data.Aeson (Object, decode)
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import Data.Bifunctor (Bifunctor (..))
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import qualified Data.ByteString as SBS
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import qualified Data.ByteString.Char8 as SBSC
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import Data.CaseInsensitive (mk)
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import Data.Either (isRight)
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import Data.List.Split (wordsBy)
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import Data.Monoid ((<>))
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import Data.Text (Text)
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import GHC.Generics (Generic)
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import Network.HTTP.Client (Manager, Request, Response, httpLbs,
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responseBody, responseStatus, responseHeaders)
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import Network.HTTP.Types (status500, status405, status401, parseMethod)
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import qualified Data.ByteString.Lazy as LBS
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import Data.CaseInsensitive (mk)
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import Data.Either (isRight)
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import Data.List.Split (wordsBy)
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import Data.Maybe (isJust)
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import Data.Monoid ((<>))
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import Data.Text (Text)
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import GHC.Generics (Generic)
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import Network.HTTP.Client (Manager, Request, Response, httpLbs,
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method, responseBody, responseHeaders,
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responseStatus)
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import Network.HTTP.Types (methodGet, methodHead, parseMethod,
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status401, renderStdMethod, status405, status500)
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-- | @500 Internal Server Error@ should be avoided - it may represent some
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-- | [__Best Practice__]
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--
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-- @500 Internal Server Error@ should be avoided - it may represent some
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-- issue with the application code, and it moreover gives the client little
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-- indication of how to proceed or what went wrong.
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--
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@ -24,7 +30,9 @@ import Network.HTTP.Types (status500, status405, status401, parseMet
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not500 :: ResponsePredicate Text Bool
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not500 = ResponsePredicate "not500" (\resp -> not $ responseStatus resp == status500)
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-- | Returning anything other than an object when returning JSON is considered
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-- | [__Best Practice__]
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--
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-- Returning anything other than an object when returning JSON is considered
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-- bad practice, as:
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--
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-- (1) it is hard to modify the returned value while maintaining backwards
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@ -66,8 +74,11 @@ getsHaveLastModifiedHeader
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-}
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-- | When an HTTP request has a method that is not allowed, a 405 response
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-- should be returned. Additionally, it is good practice to return an @Allow@
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-- | [__RFC Compliance__]
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--
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-- When an HTTP request has a method that is not allowed,
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-- a 405 response should be returned. Additionally, it is good practice to
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-- return an @Allow@
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-- header with the list of allowed methods.
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--
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-- This function checks that every @405 Method Not Allowed@ response contains
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@ -163,7 +174,9 @@ linkHeadersAreValid
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= ResponsePredicate "linkHeadersAreValid" _
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-}
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-- | Any @401 Unauthorized@ response must include a @WWW-Authenticate@ header.
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-- | [__RFC Compliance__]
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--
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-- Any @401 Unauthorized@ response must include a @WWW-Authenticate@ header.
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--
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-- This function checks that, if a response has status code 401, it contains a
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-- @WWW-Authenticate@ header.
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@ -1,4 +1,3 @@
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-- | This module contains wrappers around lower-level functionality.
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module Servant.QuickCheck.Internal.QuickCheck where
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import qualified Data.ByteString.Lazy as LBS
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@ -8,13 +7,14 @@ import Network.HTTP.Client (Manager, Request, checkStatus,
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defaultManagerSettings, httpLbs,
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newManager)
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import Network.Wai.Handler.Warp (withApplication)
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import Servant (HasServer, Server, serve)
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import Servant (Context (EmptyContext), HasServer,
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Server, serveWithContext)
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import Servant.Client (BaseUrl (..), Scheme (..))
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import System.IO.Unsafe (unsafePerformIO)
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import Test.Hspec (Expectation, expectationFailure)
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import Test.QuickCheck (Args (..), Result (..),
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quickCheckWithResult)
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import Test.QuickCheck.Monadic
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import Test.QuickCheck.Monadic (assert, forAllM, monadicIO, run)
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import Servant.QuickCheck.Internal.HasGenRequest
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import Servant.QuickCheck.Internal.Predicates
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