This commit is contained in:
Oleg Grenrus 2016-09-08 17:36:10 +03:00
parent 040db21152
commit 782f8e1541
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:set -Wall -itest -isrc -optP-include -optPdist/build/autogen/cabal_macros.h -Iinclude

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Copyright (c) 2015-2016, Servant Contributors
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following
disclaimer in the documentation and/or other materials provided
with the distribution.
* Neither the name of Alp Mestanogullari nor the names of other
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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import Distribution.Simple
main = defaultMain

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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE TypeOperators #-}
{-# OPTIONS_GHC -fno-warn-unused-binds #-}
import Data.Aeson
import GHC.Generics
import Network.Wai.Handler.Warp
import Servant
import Servant.Mock
import Test.QuickCheck.Arbitrary
newtype User = User { username :: String }
deriving (Eq, Show, Arbitrary, Generic)
instance ToJSON User
type API = "user" :> Get '[JSON] User
api :: Proxy API
api = Proxy
main :: IO ()
main = run 8080 (serve api $ mock api Proxy)

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#if __GLASGOW_HASKELL__ >= 710
#define OVERLAPPABLE_ {-# OVERLAPPABLE #-}
#define OVERLAPPING_ {-# OVERLAPPING #-}
#else
{-# LANGUAGE OverlappingInstances #-}
#define OVERLAPPABLE_
#define OVERLAPPING_
#endif

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name: servant-mock
version: 0.8.1
synopsis: Derive a mock server for free from your servant API types
description:
Derive a mock server for free from your servant API types
.
See the @Servant.Mock@ module for the documentation and an example.
homepage: http://github.com/haskell-servant/servant
license: BSD3
license-file: LICENSE
author: Servant Contributors
maintainer: haskell-servant-maintainers@googlegroups.com
copyright: 2015-2016 Servant Contributors
category: Web
build-type: Simple
extra-source-files: include/*.h
cabal-version: >=1.10
bug-reports: http://github.com/haskell-servant/servant/issues
source-repository head
type: git
location: http://github.com/haskell-servant/servant.git
flag example
description: Build the example too
default: True
library
exposed-modules:
Servant.Mock
build-depends:
base >=4.7 && <5,
bytestring >= 0.10 && <0.11,
http-types >= 0.8 && <0.10,
servant == 0.8.*,
servant-server == 0.8.*,
transformers >= 0.3 && <0.6,
QuickCheck >= 2.7 && <2.10,
wai >= 3.0 && <3.3
hs-source-dirs: src
default-language: Haskell2010
include-dirs: include
ghc-options: -Wall
executable mock-app
main-is: main.hs
hs-source-dirs: example
default-language: Haskell2010
build-depends: aeson, base, servant-mock, servant-server, QuickCheck, warp
if flag(example)
buildable: True
else
buildable: False
ghc-options: -Wall
test-suite spec
type: exitcode-stdio-1.0
ghc-options: -Wall
default-language: Haskell2010
hs-source-dirs: test
main-is: Spec.hs
other-modules:
Servant.MockSpec
build-depends:
base,
hspec,
hspec-wai,
QuickCheck,
servant,
servant-server,
servant-mock,
aeson,
wai

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{-# LANGUAGE CPP #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE PolyKinds #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeOperators #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
#include "overlapping-compat.h"
-- |
-- Module : Servant.Mock
-- Copyright : 2015 Alp Mestanogullari
-- License : BSD3
--
-- Maintainer : Alp Mestanogullari <alpmestan@gmail.com>
-- Stability : experimental
-- Portability : portable
--
-- Automatically derive a mock webserver that implements some API type,
-- just from the said API type's definition.
--
-- Using this module couldn't be simpler. Given some API type, like:
--
-- > type API = "user" :> Get '[JSON] User
--
-- that describes your web application, all you have to do is define
-- a 'Proxy' to it:
--
-- > myAPI :: Proxy API
-- > myAPI = Proxy
--
-- and call 'mock', which has the following type:
--
-- @
-- 'mock' :: 'HasMock' api context => 'Proxy' api -> 'Proxy' context -> 'Server' api
-- @
--
-- What this says is, given some API type @api@ that it knows it can
-- "mock", 'mock' hands you an implementation of the API type. It does so
-- by having each request handler generate a random value of the
-- appropriate type (@User@ in our case). All you need for this to work is
-- to provide 'Arbitrary' instances for the data types returned as response
-- bodies, hence appearing next to 'Delete', 'Get', 'Patch', 'Post' and 'Put'.
--
-- To put this all to work and run the mock server, just call 'serve' on the
-- result of 'mock' to get an 'Application' that you can then run with warp.
--
-- @
-- main :: IO ()
-- main = Network.Wai.Handler.Warp.run 8080 $
-- 'serve' myAPI ('mock' myAPI Proxy)
-- @
module Servant.Mock ( HasMock(..) ) where
#if !MIN_VERSION_base(4,8,0)
import Control.Applicative
#endif
import Control.Monad.IO.Class
import Data.ByteString.Lazy.Char8 (pack)
import Data.Proxy
import GHC.TypeLits
import Network.HTTP.Types.Status
import Network.Wai
import Servant
import Servant.API.ContentTypes
import Test.QuickCheck.Arbitrary (Arbitrary (..), vector)
import Test.QuickCheck.Gen (Gen, generate)
-- | 'HasMock' defines an interpretation of API types
-- than turns them into random-response-generating
-- request handlers, hence providing an instance for
-- all the combinators of the core /servant/ library.
class HasServer api context => HasMock api context where
-- | Calling this method creates request handlers of
-- the right type to implement the API described by
-- @api@ that just generate random response values of
-- the right type. E.g:
--
-- @
-- type API = "user" :> Get '[JSON] User
-- :<|> "book" :> Get '[JSON] Book
--
-- api :: Proxy API
-- api = Proxy
--
-- -- let's say we will start with the frontend,
-- -- and hence need a placeholder server
-- server :: Server API
-- server = mock api Proxy
-- @
--
-- What happens here is that @'Server' API@
-- actually "means" 2 request handlers, of the following types:
--
-- @
-- getUser :: Handler User
-- getBook :: Handler Book
-- @
--
-- So under the hood, 'mock' uses the 'IO' bit to generate
-- random values of type 'User' and 'Book' every time these
-- endpoints are requested.
mock :: Proxy api -> Proxy context -> Server api
instance (HasMock a context, HasMock b context) => HasMock (a :<|> b) context where
mock _ context = mock (Proxy :: Proxy a) context :<|> mock (Proxy :: Proxy b) context
instance (KnownSymbol path, HasMock rest context) => HasMock (path :> rest) context where
mock _ = mock (Proxy :: Proxy rest)
instance (KnownSymbol s, FromHttpApiData a, HasMock rest context) => HasMock (Capture s a :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance (KnownSymbol s, FromHttpApiData a, HasMock rest context) => HasMock (CaptureAll s a :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance (AllCTUnrender ctypes a, HasMock rest context) => HasMock (ReqBody ctypes a :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance HasMock rest context => HasMock (RemoteHost :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance HasMock rest context => HasMock (IsSecure :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance HasMock rest context => HasMock (Vault :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance HasMock rest context => HasMock (HttpVersion :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance (KnownSymbol s, FromHttpApiData a, HasMock rest context)
=> HasMock (QueryParam s a :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance (KnownSymbol s, FromHttpApiData a, HasMock rest context)
=> HasMock (QueryParams s a :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance (KnownSymbol s, HasMock rest context) => HasMock (QueryFlag s :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance (KnownSymbol h, FromHttpApiData a, HasMock rest context) => HasMock (Header h a :> rest) context where
mock _ context = \_ -> mock (Proxy :: Proxy rest) context
instance (Arbitrary a, KnownNat status, ReflectMethod method, AllCTRender ctypes a)
=> HasMock (Verb method status ctypes a) context where
mock _ _ = mockArbitrary
instance OVERLAPPING_
(GetHeaders (Headers headerTypes a), Arbitrary (HList headerTypes),
Arbitrary a, KnownNat status, ReflectMethod method, AllCTRender ctypes a)
=> HasMock (Verb method status ctypes (Headers headerTypes a)) context where
mock _ _ = mockArbitrary
instance HasMock Raw context where
mock _ _ = \_req respond -> do
bdy <- genBody
respond $ responseLBS status200 [] bdy
where genBody = pack <$> generate (vector 100 :: Gen [Char])
instance (HasContextEntry context (NamedContext name subContext), HasMock rest subContext) =>
HasMock (WithNamedContext name subContext rest) context where
mock _ _ = mock (Proxy :: Proxy rest) (Proxy :: Proxy subContext)
mockArbitrary :: (MonadIO m, Arbitrary a) => m a
mockArbitrary = liftIO (generate arbitrary)
-- utility instance
instance (Arbitrary (HList ls), Arbitrary a)
=> Arbitrary (Headers ls a) where
arbitrary = Headers <$> arbitrary <*> arbitrary
instance Arbitrary (HList '[]) where
arbitrary = pure HNil
instance (Arbitrary a, Arbitrary (HList hs))
=> Arbitrary (HList (Header h a ': hs)) where
arbitrary = HCons <$> fmap Header arbitrary <*> arbitrary
instance Arbitrary NoContent where
arbitrary = pure NoContent

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{-# LANGUAGE ConstraintKinds #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TypeOperators #-}
module Servant.MockSpec where
import Data.Aeson as Aeson
import Data.Proxy
import GHC.Generics
import Network.Wai
import Servant.API
import Test.Hspec hiding (pending)
import Test.Hspec.Wai
import Test.QuickCheck
import Servant
import Servant.API.Internal.Test.ComprehensiveAPI
import Servant.Mock
-- This declaration simply checks that all instances are in place.
_ = mock comprehensiveAPI (Proxy :: Proxy '[NamedContext "foo" '[]])
data Body
= Body
| ArbitraryBody
deriving (Generic)
instance ToJSON Body
instance Arbitrary Body where
arbitrary = return ArbitraryBody
data TestHeader
= TestHeader
| ArbitraryHeader
deriving (Show)
instance ToHttpApiData TestHeader where
toHeader = toHeader . show
toUrlPiece = toUrlPiece . show
toQueryParam = toQueryParam . show
instance Arbitrary TestHeader where
arbitrary = return ArbitraryHeader
spec :: Spec
spec = do
describe "mock" $ do
context "Get" $ do
let api :: Proxy (Get '[JSON] Body)
api = Proxy
app = serve api (mock api Proxy)
with (return app) $ do
it "serves arbitrary response bodies" $ do
get "/" `shouldRespondWith` 200{
matchBody = Just $ Aeson.encode ArbitraryBody
}
context "response headers" $ do
let withHeader :: Proxy (Get '[JSON] (Headers '[Header "foo" TestHeader] Body))
withHeader = Proxy
withoutHeader :: Proxy (Get '[JSON] (Headers '[] Body))
withoutHeader = Proxy
toApp :: (HasMock api '[]) => Proxy api -> IO Application
toApp api = return $ serve api (mock api (Proxy :: Proxy '[]))
with (toApp withHeader) $ do
it "serves arbitrary response bodies" $ do
get "/" `shouldRespondWith` 200{
matchHeaders = return $ MatchHeader $ \ h ->
if h == [("Content-Type", "application/json"), ("foo", "ArbitraryHeader")]
then Nothing
else Just ("headers not correct\n")
}
with (toApp withoutHeader) $ do
it "works for no additional headers" $ do
get "/" `shouldRespondWith` 200{
matchHeaders = return $ MatchHeader $ \ h ->
if h == [("Content-Type", "application/json")]
then Nothing
else Just ("headers not correct\n")
}

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{-# OPTIONS_GHC -F -pgmF hspec-discover #-}

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dependencies:
- name: servant
path: ../servant
- name: servant-server
path: ../servant-server

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@ -4,4 +4,3 @@ servant-client
servant-docs
servant-foreign
servant-js
servant-mock

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@ -5,7 +5,6 @@ packages:
- servant-docs/
- servant-foreign/
- servant-js/
- servant-mock/
- servant-server/
extra-deps:
- base-compat-0.9.1
@ -18,10 +17,6 @@ extra-deps:
- hspec-expectations-0.7.2
- http-api-data-0.2.2
- primitive-0.6.1.0
- servant-0.7.1
- servant-client-0.7.1
- servant-docs-0.7.1
- servant-server-0.7.1
- should-not-typecheck-2.1.0
- time-locale-compat-0.1.1.1
- wai-app-static-3.1.5

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@ -5,7 +5,6 @@ packages:
- servant-docs/
- servant-foreign/
- servant-js/
- servant-mock/
- servant-server/
extra-deps: []
flags: {}

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@ -5,7 +5,6 @@ packages:
- servant-docs/
- servant-foreign/
- servant-js/
- servant-mock/
- servant-server/
- doc/tutorial
extra-deps: