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{-# LANGUAGE TemplateHaskell #-}

{-# OPTIONS_GHC -fno-warn-orphans #-}

{-| Unittests for ganeti-htools.

-}

{-

Copyright (C) 2009, 2010, 2011, 2012 Google Inc.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, USA.

-}

module Test.Ganeti.Luxi (testLuxi) where

import Test.QuickCheck

import Test.QuickCheck.Monadic (monadicIO, run, stop)

import Control.Applicative

import Control.Concurrent (forkIO)

import Control.Exception (bracket)

import System.Directory (getTemporaryDirectory, removeFile)

import System.IO (hClose, openTempFile)

import qualified Text.JSON as J

import Test.Ganeti.TestHelper

import Test.Ganeti.TestCommon

import Test.Ganeti.Query.Language (genFilter)

import Test.Ganeti.OpCodes ()

import Ganeti.BasicTypes

import qualified Ganeti.Luxi as Luxi

-- * Luxi tests

$(genArbitrary ''Luxi.TagObject)

$(genArbitrary ''Luxi.LuxiReq)

instance Arbitrary Luxi.LuxiOp where

  arbitrary = do

    lreq <- arbitrary

    case lreq of

      Luxi.ReqQuery -> Luxi.Query <$> arbitrary <*> getFields <*> genFilter

      Luxi.ReqQueryFields -> Luxi.QueryFields <$> arbitrary <*> getFields

      Luxi.ReqQueryNodes -> Luxi.QueryNodes <$> listOf getFQDN <*>

                            getFields <*> arbitrary

      Luxi.ReqQueryGroups -> Luxi.QueryGroups <$> arbitrary <*>

                             arbitrary <*> arbitrary

      Luxi.ReqQueryInstances -> Luxi.QueryInstances <$> listOf getFQDN <*>

                                getFields <*> arbitrary

      Luxi.ReqQueryJobs -> Luxi.QueryJobs <$> arbitrary <*> getFields

      Luxi.ReqQueryExports -> Luxi.QueryExports <$>

                              listOf getFQDN <*> arbitrary

      Luxi.ReqQueryConfigValues -> Luxi.QueryConfigValues <$> getFields

      Luxi.ReqQueryClusterInfo -> pure Luxi.QueryClusterInfo

      Luxi.ReqQueryTags -> Luxi.QueryTags <$> arbitrary <*> getFQDN

      Luxi.ReqSubmitJob -> Luxi.SubmitJob <$> resize maxOpCodes arbitrary

      Luxi.ReqSubmitManyJobs -> Luxi.SubmitManyJobs <$>

                                resize maxOpCodes arbitrary

      Luxi.ReqWaitForJobChange -> Luxi.WaitForJobChange <$> arbitrary <*>

                                  getFields <*> pure J.JSNull <*>

                                  pure J.JSNull <*> arbitrary

      Luxi.ReqArchiveJob -> Luxi.ArchiveJob <$> arbitrary

      Luxi.ReqAutoArchiveJobs -> Luxi.AutoArchiveJobs <$> arbitrary <*>

                                 arbitrary

      Luxi.ReqCancelJob -> Luxi.CancelJob <$> arbitrary

      Luxi.ReqSetDrainFlag -> Luxi.SetDrainFlag <$> arbitrary

      Luxi.ReqSetWatcherPause -> Luxi.SetWatcherPause <$> arbitrary

-- | Simple check that encoding/decoding of LuxiOp works.

prop_CallEncoding :: Luxi.LuxiOp -> Property

prop_CallEncoding op =

  (Luxi.validateCall (Luxi.buildCall op) >>= Luxi.decodeCall) ==? Ok op

-- | Helper to a get a temporary file name.

getTempFileName :: IO FilePath

getTempFileName = do

  tempdir <- getTemporaryDirectory

  (fpath, handle) <- openTempFile tempdir "luxitest"

  _ <- hClose handle

  removeFile fpath

  return fpath

-- | Server ping-pong helper.

luxiServerPong :: Luxi.Client -> IO ()

luxiServerPong c = do

  msg <- Luxi.recvMsgExt c

  case msg of

    Luxi.RecvOk m -> Luxi.sendMsg c m >> luxiServerPong c

    _ -> return ()

-- | Client ping-pong helper.

luxiClientPong :: Luxi.Client -> [String] -> IO [String]

luxiClientPong c =

  mapM (\m -> Luxi.sendMsg c m >> Luxi.recvMsg c)

-- | Monadic check that, given a server socket, we can connect via a

-- client to it, and that we can send a list of arbitrary messages and

-- get back what we sent.

prop_ClientServer :: [[DNSChar]] -> Property

prop_ClientServer dnschars = monadicIO $ do

  let msgs = map (map dnsGetChar) dnschars

  fpath <- run getTempFileName

  -- we need to create the server first, otherwise (if we do it in the

  -- forked thread) the client could try to connect to it before it's

  -- ready

  server <- run $ Luxi.getServer fpath

  -- fork the server responder

  _ <- run . forkIO $

    bracket

      (Luxi.acceptClient server)

      (\c -> Luxi.closeClient c >> Luxi.closeServer fpath server)

      luxiServerPong

  replies <- run $

    bracket

      (Luxi.getClient fpath)

      Luxi.closeClient

      (`luxiClientPong` msgs)

  stop $ replies ==? msgs

testSuite "Luxi"

          [ 'prop_CallEncoding

          , 'prop_ClientServer

          ]