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{-# LANGUAGE TupleSections, TemplateHaskell #-}

{-| Unittests for Instance Queries.

-}

{-

Copyright (C) 2013 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.Query.Instance

  ( testQuery_Instance

  ) where

import qualified Data.Map as Map

import qualified Data.Set as Set

import Ganeti.JSON

import Ganeti.Objects

import Ganeti.Query.Instance

import Ganeti.Rpc

import Ganeti.Types

import Test.Ganeti.TestHelper

import Test.HUnit

{-# ANN module "HLint: ignore Use camelCase" #-}

-- | Creates an instance with the desired name, pnode uuid, and AdminState.

-- All other fields are placeholders.

createInstance :: String -> String -> AdminState -> Instance

createInstance name pnodeUuid adminState =

  Instance name pnodeUuid "" Kvm

    (GenericContainer Map.empty)

    (PartialBeParams Nothing Nothing Nothing Nothing Nothing Nothing)

    (GenericContainer Map.empty)

    adminState [] [] DTDrbd8 False Nothing 0.0 0.0 "" 0 Set.empty

-- | A fake InstanceInfo to be used to check values.

fakeInstanceInfo :: InstanceInfo

fakeInstanceInfo = InstanceInfo 0 "" 0 0

-- | Erroneous node response - the exact error does not matter.

responseError :: String -> (String, ERpcError a)

responseError name = (name, Left . RpcResultError $ "Insignificant error")

-- | Successful response - the error does not really matter.

responseSuccess :: String

                -> [String]

                -> (String, ERpcError RpcResultAllInstancesInfo)

responseSuccess name instNames = (name, Right .

  RpcResultAllInstancesInfo . map (, fakeInstanceInfo) $ instNames)

-- | The instance used for testing. Called Waldo as test cases involve trouble

-- finding information related to it.

waldoInstance :: Instance

waldoInstance = createInstance "Waldo" "prim" AdminUp

-- | Check that an error is thrown when the node is offline

case_nodeOffline :: Assertion

case_nodeOffline =

  let responses = [ responseError   "prim"

                  , responseError   "second"

                  , responseSuccess "node" ["NotWaldo", "DefinitelyNotWaldo"]

                  ]

  in case getInstanceInfo responses waldoInstance of

       Left _   -> return ()

       Right _  -> assertFailure

         "Error occurred when instance info is missing and node is offline"

-- | Check that a Right Nothing is returned when the node is online, yet no info

-- is present anywhere in the system.

case_nodeOnlineNoInfo :: Assertion

case_nodeOnlineNoInfo =

  let responses = [ responseSuccess "prim"   ["NotWaldo1"]

                  , responseSuccess "second" ["NotWaldo2"]

                  , responseError   "node"

                  ]

  in case getInstanceInfo responses waldoInstance of

       Left _         -> assertFailure

         "Error occurred when instance info could be found on primary"

       Right Nothing  -> return ()

       Right _        -> assertFailure

         "Some instance info found when none should be"

-- | Check the case when the info is on the primary node

case_infoOnPrimary :: Assertion

case_infoOnPrimary =

  let responses = [ responseSuccess "prim"   ["NotWaldo1", "Waldo"]

                  , responseSuccess "second" ["NotWaldo2"]

                  , responseSuccess "node"   ["NotWaldo3"]

                  ]

  in case getInstanceInfo responses waldoInstance of

       Left _                  -> assertFailure

         "Cannot retrieve instance info when present on primary node"

       Right (Just (_, True))  -> return ()

       Right _                 -> assertFailure

         "Instance info not found on primary node, despite being there"

-- | Check the case when the info is on the primary node

case_infoOnSecondary :: Assertion

case_infoOnSecondary =

  let responses = [ responseSuccess "prim"   ["NotWaldo1"]

                  , responseSuccess "second" ["Waldo", "NotWaldo2"]

                  , responseError   "node"

                  ]

  in case getInstanceInfo responses waldoInstance of

       Left _                   -> assertFailure

         "Cannot retrieve instance info when present on secondary node"

       Right (Just (_, False))  -> return ()

       Right _                  -> assertFailure

         "Instance info not found on secondary node, despite being there"

testSuite "Query_Instance"

  [ 'case_nodeOffline

  , 'case_nodeOnlineNoInfo

  , 'case_infoOnPrimary

  , 'case_infoOnSecondary

  ]