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{-# LANGUAGE TemplateHaskell #-}

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

-- FIXME: should remove the no-warn-unused-imports option, once we get

-- around to testing function from all modules; until then, we keep

-- the (unused) imports here to generate correct coverage (0 for

-- modules we don't use)

{-| 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 Ganeti.HTools.QC

  ( testUtils

  , testPeerMap

  , testContainer

  , testInstance

  , testNode

  , testText

  , testSimu

  , testOpCodes

  , testJobs

  , testCluster

  , testLoader

  , testTypes

  , testCLI

  , testJSON

  , testLuxi

  , testSsconf

  , testRpc

  , testQlang

  , testConfd

  , testObjects

  ) where

import qualified Test.HUnit as HUnit

import Test.QuickCheck

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

import Text.Printf (printf)

import Data.List (intercalate, nub, isPrefixOf, sort, (\\))

import Data.Maybe

import qualified Data.Set as Set

import Control.Monad

import Control.Applicative

import qualified System.Console.GetOpt as GetOpt

import qualified Text.JSON as J

import qualified Data.Map as Map

import qualified Data.IntMap as IntMap

import Control.Concurrent (forkIO)

import Control.Exception (bracket, catchJust)

import System.Directory (getTemporaryDirectory, removeFile)

import System.Environment (getEnv)

import System.Exit (ExitCode(..))

import System.IO (hClose, openTempFile)

import System.IO.Error (isEOFErrorType, ioeGetErrorType, isDoesNotExistError)

import System.Process (readProcessWithExitCode)

import qualified Ganeti.Confd as Confd

import qualified Ganeti.Confd.Server as Confd.Server

import qualified Ganeti.Confd.Utils as Confd.Utils

import qualified Ganeti.Config as Config

import qualified Ganeti.Daemon as Daemon

import qualified Ganeti.Hash as Hash

import qualified Ganeti.BasicTypes as BasicTypes

import qualified Ganeti.Jobs as Jobs

import qualified Ganeti.Logging as Logging

import qualified Ganeti.Luxi as Luxi

import qualified Ganeti.Objects as Objects

import qualified Ganeti.OpCodes as OpCodes

import qualified Ganeti.Rpc as Rpc

import qualified Ganeti.Query.Language as Qlang

import qualified Ganeti.Runtime as Runtime

import qualified Ganeti.Ssconf as Ssconf

import qualified Ganeti.HTools.CLI as CLI

import qualified Ganeti.HTools.Cluster as Cluster

import qualified Ganeti.HTools.Container as Container

import qualified Ganeti.HTools.ExtLoader

import qualified Ganeti.HTools.Group as Group

import qualified Ganeti.HTools.IAlloc as IAlloc

import qualified Ganeti.HTools.Instance as Instance

import qualified Ganeti.HTools.JSON as JSON

import qualified Ganeti.HTools.Loader as Loader

import qualified Ganeti.HTools.Luxi as HTools.Luxi

import qualified Ganeti.HTools.Node as Node

import qualified Ganeti.HTools.PeerMap as PeerMap

import qualified Ganeti.HTools.Rapi

import qualified Ganeti.HTools.Simu as Simu

import qualified Ganeti.HTools.Text as Text

import qualified Ganeti.HTools.Types as Types

import qualified Ganeti.HTools.Utils as Utils

import qualified Ganeti.HTools.Version

import qualified Ganeti.Constants as C

import qualified Ganeti.HTools.Program as Program

import qualified Ganeti.HTools.Program.Hail

import qualified Ganeti.HTools.Program.Hbal

import qualified Ganeti.HTools.Program.Hscan

import qualified Ganeti.HTools.Program.Hspace

import Ganeti.HTools.QCHelper (testSuite)

-- * Constants

-- | Maximum memory (1TiB, somewhat random value).

maxMem :: Int

maxMem = 1024 * 1024

-- | Maximum disk (8TiB, somewhat random value).

maxDsk :: Int

maxDsk = 1024 * 1024 * 8

-- | Max CPUs (1024, somewhat random value).

maxCpu :: Int

maxCpu = 1024

-- | Max vcpu ratio (random value).

maxVcpuRatio :: Double

maxVcpuRatio = 1024.0

-- | Max spindle ratio (random value).

maxSpindleRatio :: Double

maxSpindleRatio = 1024.0

-- | Max nodes, used just to limit arbitrary instances for smaller

-- opcode definitions (e.g. list of nodes in OpTestDelay).

maxNodes :: Int

maxNodes = 32

-- | Max opcodes or jobs in a submit job and submit many jobs.

maxOpCodes :: Int

maxOpCodes = 16

-- | All disk templates (used later)

allDiskTemplates :: [Types.DiskTemplate]

allDiskTemplates = [minBound..maxBound]

-- | Null iPolicy, and by null we mean very liberal.

nullIPolicy :: Types.IPolicy

nullIPolicy = Types.IPolicy

  { Types.iPolicyMinSpec = Types.ISpec { Types.iSpecMemorySize = 0

                                       , Types.iSpecCpuCount   = 0

                                       , Types.iSpecDiskSize   = 0

                                       , Types.iSpecDiskCount  = 0

                                       , Types.iSpecNicCount   = 0

                                       , Types.iSpecSpindleUse = 0

                                       }

  , Types.iPolicyMaxSpec = Types.ISpec { Types.iSpecMemorySize = maxBound

                                       , Types.iSpecCpuCount   = maxBound

                                       , Types.iSpecDiskSize   = maxBound

                                       , Types.iSpecDiskCount  = C.maxDisks

                                       , Types.iSpecNicCount   = C.maxNics

                                       , Types.iSpecSpindleUse = maxBound

                                       }

  , Types.iPolicyStdSpec = Types.ISpec { Types.iSpecMemorySize = Types.unitMem

                                       , Types.iSpecCpuCount   = Types.unitCpu

                                       , Types.iSpecDiskSize   = Types.unitDsk

                                       , Types.iSpecDiskCount  = 1

                                       , Types.iSpecNicCount   = 1

                                       , Types.iSpecSpindleUse = 1

                                       }

  , Types.iPolicyDiskTemplates = [minBound..maxBound]

  , Types.iPolicyVcpuRatio = maxVcpuRatio -- somewhat random value, high

                                          -- enough to not impact us

  , Types.iPolicySpindleRatio = maxSpindleRatio

  }

defGroup :: Group.Group

defGroup = flip Group.setIdx 0 $

             Group.create "default" Types.defaultGroupID Types.AllocPreferred

                  nullIPolicy

defGroupList :: Group.List

defGroupList = Container.fromList [(Group.idx defGroup, defGroup)]

defGroupAssoc :: Map.Map String Types.Gdx

defGroupAssoc = Map.singleton (Group.uuid defGroup) (Group.idx defGroup)

-- * Helper functions

-- | Simple checker for whether OpResult is fail or pass.

isFailure :: Types.OpResult a -> Bool

isFailure (Types.OpFail _) = True

isFailure _ = False

-- | Checks for equality with proper annotation.

(==?) :: (Show a, Eq a) => a -> a -> Property

(==?) x y = printTestCase

            ("Expected equality, but '" ++

             show x ++ "' /= '" ++ show y ++ "'") (x == y)

infix 3 ==?

-- | Show a message and fail the test.

failTest :: String -> Property

failTest msg = printTestCase msg False

-- | Return the python binary to use. If the PYTHON environment

-- variable is defined, use its value, otherwise use just \"python\".

pythonCmd :: IO String

pythonCmd = catchJust (guard . isDoesNotExistError)

            (getEnv "PYTHON") (const (return "python"))

-- | Run Python with an expression, returning the exit code, standard

-- output and error.

runPython :: String -> String -> IO (ExitCode, String, String)

runPython expr stdin = do

  py_binary <- pythonCmd

  readProcessWithExitCode py_binary ["-c", expr] stdin

-- | Check python exit code, and fail via HUnit assertions if

-- non-zero. Otherwise, return the standard output.

checkPythonResult :: (ExitCode, String, String) -> IO String

checkPythonResult (py_code, py_stdout, py_stderr) = do

  HUnit.assertEqual ("python exited with error: " ++ py_stderr)

       ExitSuccess py_code

  return py_stdout

-- | Update an instance to be smaller than a node.

setInstanceSmallerThanNode :: Node.Node

                           -> Instance.Instance -> Instance.Instance

setInstanceSmallerThanNode node inst =

  inst { Instance.mem = Node.availMem node `div` 2

       , Instance.dsk = Node.availDisk node `div` 2

       , Instance.vcpus = Node.availCpu node `div` 2

       }

-- | Create an instance given its spec.

createInstance :: Int -> Int -> Int -> Instance.Instance

createInstance mem dsk vcpus =

  Instance.create "inst-unnamed" mem dsk vcpus Types.Running [] True (-1) (-1)

    Types.DTDrbd8 1

-- | Create a small cluster by repeating a node spec.

makeSmallCluster :: Node.Node -> Int -> Node.List

makeSmallCluster node count =

  let origname = Node.name node

      origalias = Node.alias node

      nodes = map (\idx -> node { Node.name = origname ++ "-" ++ show idx

                                , Node.alias = origalias ++ "-" ++ show idx })

              [1..count]

      fn = flip Node.buildPeers Container.empty

      namelst = map (\n -> (Node.name n, fn n)) nodes

      (_, nlst) = Loader.assignIndices namelst

  in nlst

-- | Make a small cluster, both nodes and instances.

makeSmallEmptyCluster :: Node.Node -> Int -> Instance.Instance

                      -> (Node.List, Instance.List, Instance.Instance)

makeSmallEmptyCluster node count inst =

  (makeSmallCluster node count, Container.empty,

   setInstanceSmallerThanNode node inst)

-- | Checks if a node is "big" enough.

isNodeBig :: Int -> Node.Node -> Bool

isNodeBig size node = Node.availDisk node > size * Types.unitDsk

                      && Node.availMem node > size * Types.unitMem

                      && Node.availCpu node > size * Types.unitCpu

canBalance :: Cluster.Table -> Bool -> Bool -> Bool -> Bool

canBalance tbl dm im evac = isJust $ Cluster.tryBalance tbl dm im evac 0 0

-- | Assigns a new fresh instance to a cluster; this is not

-- allocation, so no resource checks are done.

assignInstance :: Node.List -> Instance.List -> Instance.Instance ->

                  Types.Idx -> Types.Idx ->

                  (Node.List, Instance.List)

assignInstance nl il inst pdx sdx =

  let pnode = Container.find pdx nl

      snode = Container.find sdx nl

      maxiidx = if Container.null il

                  then 0

                  else fst (Container.findMax il) + 1

      inst' = inst { Instance.idx = maxiidx,

                     Instance.pNode = pdx, Instance.sNode = sdx }

      pnode' = Node.setPri pnode inst'

      snode' = Node.setSec snode inst'

      nl' = Container.addTwo pdx pnode' sdx snode' nl

      il' = Container.add maxiidx inst' il

  in (nl', il')

-- | Generates a list of a given size with non-duplicate elements.

genUniquesList :: (Eq a, Arbitrary a) => Int -> Gen [a]

genUniquesList cnt =

  foldM (\lst _ -> do

           newelem <- arbitrary `suchThat` (`notElem` lst)

           return (newelem:lst)) [] [1..cnt]

-- | Checks if an instance is mirrored.

isMirrored :: Instance.Instance -> Bool

isMirrored = (/= Types.MirrorNone) . Instance.mirrorType

-- | Returns the possible change node types for a disk template.

evacModeOptions :: Types.MirrorType -> [Types.EvacMode]

evacModeOptions Types.MirrorNone     = []

evacModeOptions Types.MirrorInternal = [minBound..maxBound] -- DRBD can do all

evacModeOptions Types.MirrorExternal = [Types.ChangePrimary, Types.ChangeAll]

-- * Arbitrary instances

-- | Defines a DNS name.

newtype DNSChar = DNSChar { dnsGetChar::Char }

instance Arbitrary DNSChar where

  arbitrary = do

    x <- elements (['a'..'z'] ++ ['0'..'9'] ++ "_-")

    return (DNSChar x)

instance Show DNSChar where

  show = show . dnsGetChar

-- | Generates a single name component.

getName :: Gen String

getName = do

  n <- choose (1, 64)

  dn <- vector n

  return (map dnsGetChar dn)

-- | Generates an entire FQDN.

getFQDN :: Gen String

getFQDN = do

  ncomps <- choose (1, 4)

  names <- vectorOf ncomps getName

  return $ intercalate "." names

-- | Combinator that generates a 'Maybe' using a sub-combinator.

getMaybe :: Gen a -> Gen (Maybe a)

getMaybe subgen = do

  bool <- arbitrary

  if bool

    then Just <$> subgen

    else return Nothing

-- | Generates a fields list. This uses the same character set as a

-- DNS name (just for simplicity).

getFields :: Gen [String]

getFields = do

  n <- choose (1, 32)

  vectorOf n getName

-- | Defines a tag type.

newtype TagChar = TagChar { tagGetChar :: Char }

-- | All valid tag chars. This doesn't need to match _exactly_

-- Ganeti's own tag regex, just enough for it to be close.

tagChar :: [Char]

tagChar = ['a'..'z'] ++ ['A'..'Z'] ++ ['0'..'9'] ++ ".+*/:@-"

instance Arbitrary TagChar where

  arbitrary = do

    c <- elements tagChar

    return (TagChar c)

-- | Generates a tag

genTag :: Gen [TagChar]

genTag = do

  -- the correct value would be C.maxTagLen, but that's way too

  -- verbose in unittests, and at the moment I don't see any possible

  -- bugs with longer tags and the way we use tags in htools

  n <- choose (1, 10)

  vector n

-- | Generates a list of tags (correctly upper bounded).

genTags :: Gen [String]

genTags = do

  -- the correct value would be C.maxTagsPerObj, but per the comment

  -- in genTag, we don't use tags enough in htools to warrant testing

  -- such big values

  n <- choose (0, 10::Int)

  tags <- mapM (const genTag) [1..n]

  return $ map (map tagGetChar) tags

instance Arbitrary Types.InstanceStatus where

    arbitrary = elements [minBound..maxBound]

-- | Generates a random instance with maximum disk/mem/cpu values.

genInstanceSmallerThan :: Int -> Int -> Int -> Gen Instance.Instance

genInstanceSmallerThan lim_mem lim_dsk lim_cpu = do

  name <- getFQDN

  mem <- choose (0, lim_mem)

  dsk <- choose (0, lim_dsk)

  run_st <- arbitrary

  pn <- arbitrary

  sn <- arbitrary

  vcpus <- choose (0, lim_cpu)

  dt <- arbitrary

  return $ Instance.create name mem dsk vcpus run_st [] True pn sn dt 1

-- | Generates an instance smaller than a node.

genInstanceSmallerThanNode :: Node.Node -> Gen Instance.Instance

genInstanceSmallerThanNode node =

  genInstanceSmallerThan (Node.availMem node `div` 2)

                         (Node.availDisk node `div` 2)

                         (Node.availCpu node `div` 2)

-- let's generate a random instance

instance Arbitrary Instance.Instance where

  arbitrary = genInstanceSmallerThan maxMem maxDsk maxCpu

-- | Generas an arbitrary node based on sizing information.

genNode :: Maybe Int -- ^ Minimum node size in terms of units

        -> Maybe Int -- ^ Maximum node size (when Nothing, bounded

                     -- just by the max... constants)

        -> Gen Node.Node

genNode min_multiplier max_multiplier = do

  let (base_mem, base_dsk, base_cpu) =

        case min_multiplier of

          Just mm -> (mm * Types.unitMem,

                      mm * Types.unitDsk,

                      mm * Types.unitCpu)

          Nothing -> (0, 0, 0)

      (top_mem, top_dsk, top_cpu)  =

        case max_multiplier of

          Just mm -> (mm * Types.unitMem,

                      mm * Types.unitDsk,

                      mm * Types.unitCpu)

          Nothing -> (maxMem, maxDsk, maxCpu)

  name  <- getFQDN

  mem_t <- choose (base_mem, top_mem)

  mem_f <- choose (base_mem, mem_t)

  mem_n <- choose (0, mem_t - mem_f)

  dsk_t <- choose (base_dsk, top_dsk)

  dsk_f <- choose (base_dsk, dsk_t)

  cpu_t <- choose (base_cpu, top_cpu)

  offl  <- arbitrary

  let n = Node.create name (fromIntegral mem_t) mem_n mem_f

          (fromIntegral dsk_t) dsk_f (fromIntegral cpu_t) offl 1 0

      n' = Node.setPolicy nullIPolicy n

  return $ Node.buildPeers n' Container.empty

-- | Helper function to generate a sane node.

genOnlineNode :: Gen Node.Node

genOnlineNode = do

  arbitrary `suchThat` (\n -> not (Node.offline n) &&

                              not (Node.failN1 n) &&

                              Node.availDisk n > 0 &&

                              Node.availMem n > 0 &&

                              Node.availCpu n > 0)

-- and a random node

instance Arbitrary Node.Node where

  arbitrary = genNode Nothing Nothing

-- replace disks

instance Arbitrary OpCodes.ReplaceDisksMode where

  arbitrary = elements [minBound..maxBound]

instance Arbitrary OpCodes.DiskIndex where

  arbitrary = choose (0, C.maxDisks - 1) >>= OpCodes.mkDiskIndex

instance Arbitrary OpCodes.OpCode where

  arbitrary = do

    op_id <- elements OpCodes.allOpIDs

    case op_id of

      "OP_TEST_DELAY" ->

        OpCodes.OpTestDelay <$> arbitrary <*> arbitrary

                 <*> resize maxNodes (listOf getFQDN)

      "OP_INSTANCE_REPLACE_DISKS" ->

        OpCodes.OpInstanceReplaceDisks <$> getFQDN <*> getMaybe getFQDN <*>

          arbitrary <*> resize C.maxDisks arbitrary <*> getMaybe getName

      "OP_INSTANCE_FAILOVER" ->

        OpCodes.OpInstanceFailover <$> getFQDN <*> arbitrary <*>

          getMaybe getFQDN

      "OP_INSTANCE_MIGRATE" ->

        OpCodes.OpInstanceMigrate <$> getFQDN <*> arbitrary <*>

          arbitrary <*> arbitrary <*> getMaybe getFQDN

      _ -> fail "Wrong opcode"

instance Arbitrary Jobs.OpStatus where

  arbitrary = elements [minBound..maxBound]

instance Arbitrary Jobs.JobStatus where

  arbitrary = elements [minBound..maxBound]

newtype SmallRatio = SmallRatio Double deriving Show

instance Arbitrary SmallRatio where

  arbitrary = do

    v <- choose (0, 1)

    return $ SmallRatio v

instance Arbitrary Types.AllocPolicy where

  arbitrary = elements [minBound..maxBound]

instance Arbitrary Types.DiskTemplate where

  arbitrary = elements [minBound..maxBound]

instance Arbitrary Types.FailMode where

  arbitrary = elements [minBound..maxBound]

instance Arbitrary Types.EvacMode where

  arbitrary = elements [minBound..maxBound]

instance Arbitrary a => Arbitrary (Types.OpResult a) where

  arbitrary = arbitrary >>= \c ->

              if c

                then Types.OpGood <$> arbitrary

                else Types.OpFail <$> arbitrary

instance Arbitrary Types.ISpec where

  arbitrary = do

    mem_s <- arbitrary::Gen (NonNegative Int)

    dsk_c <- arbitrary::Gen (NonNegative Int)

    dsk_s <- arbitrary::Gen (NonNegative Int)

    cpu_c <- arbitrary::Gen (NonNegative Int)

    nic_c <- arbitrary::Gen (NonNegative Int)

    su    <- arbitrary::Gen (NonNegative Int)

    return Types.ISpec { Types.iSpecMemorySize = fromIntegral mem_s

                       , Types.iSpecCpuCount   = fromIntegral cpu_c

                       , Types.iSpecDiskSize   = fromIntegral dsk_s

                       , Types.iSpecDiskCount  = fromIntegral dsk_c

                       , Types.iSpecNicCount   = fromIntegral nic_c

                       , Types.iSpecSpindleUse = fromIntegral su

                       }

-- | Generates an ispec bigger than the given one.

genBiggerISpec :: Types.ISpec -> Gen Types.ISpec

genBiggerISpec imin = do

  mem_s <- choose (Types.iSpecMemorySize imin, maxBound)

  dsk_c <- choose (Types.iSpecDiskCount imin, maxBound)

  dsk_s <- choose (Types.iSpecDiskSize imin, maxBound)

  cpu_c <- choose (Types.iSpecCpuCount imin, maxBound)

  nic_c <- choose (Types.iSpecNicCount imin, maxBound)

  su    <- choose (Types.iSpecSpindleUse imin, maxBound)

  return Types.ISpec { Types.iSpecMemorySize = fromIntegral mem_s

                     , Types.iSpecCpuCount   = fromIntegral cpu_c

                     , Types.iSpecDiskSize   = fromIntegral dsk_s

                     , Types.iSpecDiskCount  = fromIntegral dsk_c

                     , Types.iSpecNicCount   = fromIntegral nic_c

                     , Types.iSpecSpindleUse = fromIntegral su

                     }

instance Arbitrary Types.IPolicy where

  arbitrary = do

    imin <- arbitrary

    istd <- genBiggerISpec imin

    imax <- genBiggerISpec istd

    num_tmpl <- choose (0, length allDiskTemplates)

    dts  <- genUniquesList num_tmpl

    vcpu_ratio <- choose (1.0, maxVcpuRatio)

    spindle_ratio <- choose (1.0, maxSpindleRatio)

    return Types.IPolicy { Types.iPolicyMinSpec = imin

                         , Types.iPolicyStdSpec = istd

                         , Types.iPolicyMaxSpec = imax

                         , Types.iPolicyDiskTemplates = dts

                         , Types.iPolicyVcpuRatio = vcpu_ratio

                         , Types.iPolicySpindleRatio = spindle_ratio

                         }

instance Arbitrary Objects.Hypervisor where

  arbitrary = elements [minBound..maxBound]

instance Arbitrary Objects.PartialNDParams where

  arbitrary = Objects.PartialNDParams <$> arbitrary <*> arbitrary

instance Arbitrary Objects.Node where

  arbitrary = Objects.Node <$> getFQDN <*> getFQDN <*> getFQDN

              <*> arbitrary <*> arbitrary <*> arbitrary <*> getFQDN

              <*> arbitrary <*> arbitrary <*> arbitrary <*> arbitrary

              <*> arbitrary <*> arbitrary <*> getFQDN <*> arbitrary

              <*> (Set.fromList <$> genTags)

instance Arbitrary Rpc.RpcCallAllInstancesInfo where

  arbitrary = Rpc.RpcCallAllInstancesInfo <$> arbitrary

instance Arbitrary Rpc.RpcCallInstanceList where

  arbitrary = Rpc.RpcCallInstanceList <$> arbitrary

instance Arbitrary Rpc.RpcCallNodeInfo where

  arbitrary = Rpc.RpcCallNodeInfo <$> arbitrary <*> arbitrary

-- | Custom 'Qlang.Filter' generator (top-level), which enforces a

-- (sane) limit on the depth of the generated filters.

genFilter :: Gen (Qlang.Filter Qlang.FilterField)

genFilter = choose (0, 10) >>= genFilter'

-- | Custom generator for filters that correctly halves the state of

-- the generators at each recursive step, per the QuickCheck

-- documentation, in order not to run out of memory.

genFilter' :: Int -> Gen (Qlang.Filter Qlang.FilterField)

genFilter' 0 =

  oneof [ return Qlang.EmptyFilter

        , Qlang.TrueFilter     <$> getName

        , Qlang.EQFilter       <$> getName <*> value

        , Qlang.LTFilter       <$> getName <*> value

        , Qlang.GTFilter       <$> getName <*> value

        , Qlang.LEFilter       <$> getName <*> value

        , Qlang.GEFilter       <$> getName <*> value

        , Qlang.RegexpFilter   <$> getName <*> getName

        , Qlang.ContainsFilter <$> getName <*> value

        ]

    where value = oneof [ Qlang.QuotedString <$> getName

                        , Qlang.NumericValue <$> arbitrary

                        ]

genFilter' n = do

  oneof [ Qlang.AndFilter  <$> vectorOf n'' (genFilter' n')

        , Qlang.OrFilter   <$> vectorOf n'' (genFilter' n')

        , Qlang.NotFilter  <$> genFilter' n'

        ]

  where n' = n `div` 2 -- sub-filter generator size

        n'' = max n' 2 -- but we don't want empty or 1-element lists,

                       -- so use this for and/or filter list length

instance Arbitrary Qlang.ItemType where

  arbitrary = elements [minBound..maxBound]

-- * Actual tests

-- ** Utils tests

-- | Helper to generate a small string that doesn't contain commas.

genNonCommaString :: Gen [Char]

genNonCommaString = do

  size <- choose (0, 20) -- arbitrary max size

  vectorOf size (arbitrary `suchThat` ((/=) ','))

-- | If the list is not just an empty element, and if the elements do

-- not contain commas, then join+split should be idempotent.

prop_Utils_commaJoinSplit :: Property

prop_Utils_commaJoinSplit =

  forAll (choose (0, 20)) $ \llen ->

  forAll (vectorOf llen genNonCommaString `suchThat` ((/=) [""])) $ \lst ->

  Utils.sepSplit ',' (Utils.commaJoin lst) ==? lst

-- | Split and join should always be idempotent.

prop_Utils_commaSplitJoin :: [Char] -> Property

prop_Utils_commaSplitJoin s =

  Utils.commaJoin (Utils.sepSplit ',' s) ==? s

-- | fromObjWithDefault, we test using the Maybe monad and an integer

-- value.

prop_Utils_fromObjWithDefault :: Integer -> String -> Bool

prop_Utils_fromObjWithDefault def_value random_key =

  -- a missing key will be returned with the default

  JSON.fromObjWithDefault [] random_key def_value == Just def_value &&

  -- a found key will be returned as is, not with default

  JSON.fromObjWithDefault [(random_key, J.showJSON def_value)]

       random_key (def_value+1) == Just def_value

-- | Test that functional if' behaves like the syntactic sugar if.

prop_Utils_if'if :: Bool -> Int -> Int -> Gen Prop

prop_Utils_if'if cnd a b =

  Utils.if' cnd a b ==? if cnd then a else b

-- | Test basic select functionality

prop_Utils_select :: Int      -- ^ Default result

                  -> [Int]    -- ^ List of False values

                  -> [Int]    -- ^ List of True values

                  -> Gen Prop -- ^ Test result

prop_Utils_select def lst1 lst2 =

  Utils.select def (flist ++ tlist) ==? expectedresult

    where expectedresult = Utils.if' (null lst2) def (head lst2)

          flist = zip (repeat False) lst1

          tlist = zip (repeat True)  lst2

-- | Test basic select functionality with undefined default

prop_Utils_select_undefd :: [Int]            -- ^ List of False values

                         -> NonEmptyList Int -- ^ List of True values

                         -> Gen Prop         -- ^ Test result

prop_Utils_select_undefd lst1 (NonEmpty lst2) =

  Utils.select undefined (flist ++ tlist) ==? head lst2

    where flist = zip (repeat False) lst1

          tlist = zip (repeat True)  lst2

-- | Test basic select functionality with undefined list values

prop_Utils_select_undefv :: [Int]            -- ^ List of False values

                         -> NonEmptyList Int -- ^ List of True values

                         -> Gen Prop         -- ^ Test result

prop_Utils_select_undefv lst1 (NonEmpty lst2) =

  Utils.select undefined cndlist ==? head lst2

    where flist = zip (repeat False) lst1

          tlist = zip (repeat True)  lst2

          cndlist = flist ++ tlist ++ [undefined]

prop_Utils_parseUnit :: NonNegative Int -> Property

prop_Utils_parseUnit (NonNegative n) =

  Utils.parseUnit (show n) ==? Types.Ok n .&&.

  Utils.parseUnit (show n ++ "m") ==? Types.Ok n .&&.

  Utils.parseUnit (show n ++ "M") ==? Types.Ok (truncate n_mb::Int) .&&.

  Utils.parseUnit (show n ++ "g") ==? Types.Ok (n*1024) .&&.

  Utils.parseUnit (show n ++ "G") ==? Types.Ok (truncate n_gb::Int) .&&.

  Utils.parseUnit (show n ++ "t") ==? Types.Ok (n*1048576) .&&.

  Utils.parseUnit (show n ++ "T") ==? Types.Ok (truncate n_tb::Int) .&&.

  printTestCase "Internal error/overflow?"

    (n_mb >=0 && n_gb >= 0 && n_tb >= 0) .&&.

  property (Types.isBad (Utils.parseUnit (show n ++ "x")::Types.Result Int))

  where n_mb = (fromIntegral n::Rational) * 1000 * 1000 / 1024 / 1024

        n_gb = n_mb * 1000

        n_tb = n_gb * 1000

-- | Test list for the Utils module.

testSuite "Utils"

            [ 'prop_Utils_commaJoinSplit

            , 'prop_Utils_commaSplitJoin

            , 'prop_Utils_fromObjWithDefault

            , 'prop_Utils_if'if

            , 'prop_Utils_select

            , 'prop_Utils_select_undefd

            , 'prop_Utils_select_undefv

            , 'prop_Utils_parseUnit

            ]

-- ** PeerMap tests

-- | Make sure add is idempotent.

prop_PeerMap_addIdempotent :: PeerMap.PeerMap

                           -> PeerMap.Key -> PeerMap.Elem -> Property

prop_PeerMap_addIdempotent pmap key em =

  fn puniq ==? fn (fn puniq)

    where fn = PeerMap.add key em

          puniq = PeerMap.accumArray const pmap

-- | Make sure remove is idempotent.

prop_PeerMap_removeIdempotent :: PeerMap.PeerMap -> PeerMap.Key -> Property

prop_PeerMap_removeIdempotent pmap key =

  fn puniq ==? fn (fn puniq)

    where fn = PeerMap.remove key

          puniq = PeerMap.accumArray const pmap

-- | Make sure a missing item returns 0.

prop_PeerMap_findMissing :: PeerMap.PeerMap -> PeerMap.Key -> Property

prop_PeerMap_findMissing pmap key =

  PeerMap.find key (PeerMap.remove key puniq) ==? 0

    where puniq = PeerMap.accumArray const pmap

-- | Make sure an added item is found.

prop_PeerMap_addFind :: PeerMap.PeerMap

                     -> PeerMap.Key -> PeerMap.Elem -> Property

prop_PeerMap_addFind pmap key em =

  PeerMap.find key (PeerMap.add key em puniq) ==? em

    where puniq = PeerMap.accumArray const pmap

-- | Manual check that maxElem returns the maximum indeed, or 0 for null.

prop_PeerMap_maxElem :: PeerMap.PeerMap -> Property

prop_PeerMap_maxElem pmap =

  PeerMap.maxElem puniq ==? if null puniq then 0

                              else (maximum . snd . unzip) puniq

    where puniq = PeerMap.accumArray const pmap

-- | List of tests for the PeerMap module.

testSuite "PeerMap"

            [ 'prop_PeerMap_addIdempotent

            , 'prop_PeerMap_removeIdempotent

            , 'prop_PeerMap_maxElem

            , 'prop_PeerMap_addFind

            , 'prop_PeerMap_findMissing

            ]

-- ** Container tests

-- we silence the following due to hlint bug fixed in later versions

{-# ANN prop_Container_addTwo "HLint: ignore Avoid lambda" #-}

prop_Container_addTwo :: [Container.Key] -> Int -> Int -> Bool

prop_Container_addTwo cdata i1 i2 =

  fn i1 i2 cont == fn i2 i1 cont &&

  fn i1 i2 cont == fn i1 i2 (fn i1 i2 cont)

    where cont = foldl (\c x -> Container.add x x c) Container.empty cdata

          fn x1 x2 = Container.addTwo x1 x1 x2 x2

prop_Container_nameOf :: Node.Node -> Property

prop_Container_nameOf node =

  let nl = makeSmallCluster node 1

      fnode = head (Container.elems nl)

  in Container.nameOf nl (Node.idx fnode) ==? Node.name fnode

-- | We test that in a cluster, given a random node, we can find it by

-- its name and alias, as long as all names and aliases are unique,

-- and that we fail to find a non-existing name.

prop_Container_findByName :: Property

prop_Container_findByName =

  forAll (genNode (Just 1) Nothing) $ \node ->

  forAll (choose (1, 20)) $ \ cnt ->

  forAll (choose (0, cnt - 1)) $ \ fidx ->

  forAll (genUniquesList (cnt * 2)) $ \ allnames ->

  forAll (arbitrary `suchThat` (`notElem` allnames)) $ \ othername ->

  let names = zip (take cnt allnames) (drop cnt allnames)

      nl = makeSmallCluster node cnt

      nodes = Container.elems nl

      nodes' = map (\((name, alias), nn) -> (Node.idx nn,

                                             nn { Node.name = name,

                                                  Node.alias = alias }))

               $ zip names nodes

      nl' = Container.fromList nodes'

      target = snd (nodes' !! fidx)

  in Container.findByName nl' (Node.name target) ==? Just target .&&.

     Container.findByName nl' (Node.alias target) ==? Just target .&&.

     printTestCase "Found non-existing name"

       (isNothing (Container.findByName nl' othername))

testSuite "Container"

            [ 'prop_Container_addTwo

            , 'prop_Container_nameOf

            , 'prop_Container_findByName

            ]

-- ** Instance tests

-- Simple instance tests, we only have setter/getters

prop_Instance_creat :: Instance.Instance -> Property

prop_Instance_creat inst =

  Instance.name inst ==? Instance.alias inst

prop_Instance_setIdx :: Instance.Instance -> Types.Idx -> Property

prop_Instance_setIdx inst idx =

  Instance.idx (Instance.setIdx inst idx) ==? idx

prop_Instance_setName :: Instance.Instance -> String -> Bool

prop_Instance_setName inst name =

  Instance.name newinst == name &&

  Instance.alias newinst == name

    where newinst = Instance.setName inst name

prop_Instance_setAlias :: Instance.Instance -> String -> Bool

prop_Instance_setAlias inst name =

  Instance.name newinst == Instance.name inst &&

  Instance.alias newinst == name

    where newinst = Instance.setAlias inst name

prop_Instance_setPri :: Instance.Instance -> Types.Ndx -> Property

prop_Instance_setPri inst pdx =

  Instance.pNode (Instance.setPri inst pdx) ==? pdx

prop_Instance_setSec :: Instance.Instance -> Types.Ndx -> Property

prop_Instance_setSec inst sdx =

  Instance.sNode (Instance.setSec inst sdx) ==? sdx

prop_Instance_setBoth :: Instance.Instance -> Types.Ndx -> Types.Ndx -> Bool

prop_Instance_setBoth inst pdx sdx =

  Instance.pNode si == pdx && Instance.sNode si == sdx

    where si = Instance.setBoth inst pdx sdx

prop_Instance_shrinkMG :: Instance.Instance -> Property

prop_Instance_shrinkMG inst =

  Instance.mem inst >= 2 * Types.unitMem ==>

    case Instance.shrinkByType inst Types.FailMem of

      Types.Ok inst' -> Instance.mem inst' == Instance.mem inst - Types.unitMem

      _ -> False

prop_Instance_shrinkMF :: Instance.Instance -> Property

prop_Instance_shrinkMF inst =

  forAll (choose (0, 2 * Types.unitMem - 1)) $ \mem ->

    let inst' = inst { Instance.mem = mem}

    in Types.isBad $ Instance.shrinkByType inst' Types.FailMem

prop_Instance_shrinkCG :: Instance.Instance -> Property

prop_Instance_shrinkCG inst =

  Instance.vcpus inst >= 2 * Types.unitCpu ==>

    case Instance.shrinkByType inst Types.FailCPU of

      Types.Ok inst' ->

        Instance.vcpus inst' == Instance.vcpus inst - Types.unitCpu

      _ -> False

prop_Instance_shrinkCF :: Instance.Instance -> Property

prop_Instance_shrinkCF inst =

  forAll (choose (0, 2 * Types.unitCpu - 1)) $ \vcpus ->

    let inst' = inst { Instance.vcpus = vcpus }

    in Types.isBad $ Instance.shrinkByType inst' Types.FailCPU

prop_Instance_shrinkDG :: Instance.Instance -> Property

prop_Instance_shrinkDG inst =

  Instance.dsk inst >= 2 * Types.unitDsk ==>

    case Instance.shrinkByType inst Types.FailDisk of

      Types.Ok inst' ->

        Instance.dsk inst' == Instance.dsk inst - Types.unitDsk

      _ -> False

prop_Instance_shrinkDF :: Instance.Instance -> Property

prop_Instance_shrinkDF inst =

  forAll (choose (0, 2 * Types.unitDsk - 1)) $ \dsk ->

    let inst' = inst { Instance.dsk = dsk }

    in Types.isBad $ Instance.shrinkByType inst' Types.FailDisk

prop_Instance_setMovable :: Instance.Instance -> Bool -> Property

prop_Instance_setMovable inst m =

  Instance.movable inst' ==? m

    where inst' = Instance.setMovable inst m

testSuite "Instance"

            [ 'prop_Instance_creat

            , 'prop_Instance_setIdx

            , 'prop_Instance_setName

            , 'prop_Instance_setAlias

            , 'prop_Instance_setPri

            , 'prop_Instance_setSec

            , 'prop_Instance_setBoth

            , 'prop_Instance_shrinkMG

            , 'prop_Instance_shrinkMF

            , 'prop_Instance_shrinkCG

            , 'prop_Instance_shrinkCF

            , 'prop_Instance_shrinkDG

            , 'prop_Instance_shrinkDF

            , 'prop_Instance_setMovable

            ]

-- ** Backends

-- *** Text backend tests

-- Instance text loader tests

prop_Text_Load_Instance :: String -> Int -> Int -> Int -> Types.InstanceStatus

                        -> NonEmptyList Char -> [Char]

                        -> NonNegative Int -> NonNegative Int -> Bool

                        -> Types.DiskTemplate -> Int -> Property

prop_Text_Load_Instance name mem dsk vcpus status

                        (NonEmpty pnode) snode

                        (NonNegative pdx) (NonNegative sdx) autobal dt su =

  pnode /= snode && pdx /= sdx ==>

  let vcpus_s = show vcpus

      dsk_s = show dsk

      mem_s = show mem

      su_s = show su

      status_s = Types.instanceStatusToRaw status

      ndx = if null snode

              then [(pnode, pdx)]

              else [(pnode, pdx), (snode, sdx)]

      nl = Map.fromList ndx

      tags = ""

      sbal = if autobal then "Y" else "N"

      sdt = Types.diskTemplateToRaw dt

      inst = Text.loadInst nl

             [name, mem_s, dsk_s, vcpus_s, status_s,

              sbal, pnode, snode, sdt, tags, su_s]

      fail1 = Text.loadInst nl

              [name, mem_s, dsk_s, vcpus_s, status_s,

               sbal, pnode, pnode, tags]

  in case inst of

       Types.Bad msg -> failTest $ "Failed to load instance: " ++ msg

       Types.Ok (_, i) -> printTestCase "Mismatch in some field while\

                                        \ loading the instance" $

               Instance.name i == name &&

               Instance.vcpus i == vcpus &&

               Instance.mem i == mem &&

               Instance.pNode i == pdx &&

               Instance.sNode i == (if null snode

                                      then Node.noSecondary

                                      else sdx) &&

               Instance.autoBalance i == autobal &&

               Instance.spindleUse i == su &&

               Types.isBad fail1

prop_Text_Load_InstanceFail :: [(String, Int)] -> [String] -> Property

prop_Text_Load_InstanceFail ktn fields =

  length fields /= 10 && length fields /= 11 ==>

    case Text.loadInst nl fields of

      Types.Ok _ -> failTest "Managed to load instance from invalid data"

      Types.Bad msg -> printTestCase ("Unrecognised error message: " ++ msg) $

                       "Invalid/incomplete instance data: '" `isPrefixOf` msg

    where nl = Map.fromList ktn

prop_Text_Load_Node :: String -> Int -> Int -> Int -> Int -> Int

                    -> Int -> Bool -> Bool

prop_Text_Load_Node name tm nm fm td fd tc fo =

  let conv v = if v < 0

                 then "?"

                 else show v

      tm_s = conv tm

      nm_s = conv nm

      fm_s = conv fm

      td_s = conv td

      fd_s = conv fd

      tc_s = conv tc

      fo_s = if fo

               then "Y"

               else "N"

      any_broken = any (< 0) [tm, nm, fm, td, fd, tc]

      gid = Group.uuid defGroup

  in case Text.loadNode defGroupAssoc

       [name, tm_s, nm_s, fm_s, td_s, fd_s, tc_s, fo_s, gid] of

       Nothing -> False

       Just (name', node) ->

         if fo || any_broken

           then Node.offline node

           else Node.name node == name' && name' == name &&

                Node.alias node == name &&

                Node.tMem node == fromIntegral tm &&

                Node.nMem node == nm &&

                Node.fMem node == fm &&

                Node.tDsk node == fromIntegral td &&

                Node.fDsk node == fd &&

                Node.tCpu node == fromIntegral tc

prop_Text_Load_NodeFail :: [String] -> Property

prop_Text_Load_NodeFail fields =

  length fields /= 8 ==> isNothing $ Text.loadNode Map.empty fields

prop_Text_NodeLSIdempotent :: Property

prop_Text_NodeLSIdempotent =

  forAll (genNode (Just 1) Nothing) $ \node ->

  -- override failN1 to what loadNode returns by default

  let n = Node.setPolicy Types.defIPolicy $

          node { Node.failN1 = True, Node.offline = False }

  in

    (Text.loadNode defGroupAssoc.

         Utils.sepSplit '|' . Text.serializeNode defGroupList) n ==?

    Just (Node.name n, n)

prop_Text_ISpecIdempotent :: Types.ISpec -> Property

prop_Text_ISpecIdempotent ispec =

  case Text.loadISpec "dummy" . Utils.sepSplit ',' .

       Text.serializeISpec $ ispec of

    Types.Bad msg -> failTest $ "Failed to load ispec: " ++ msg

    Types.Ok ispec' -> ispec ==? ispec'

prop_Text_IPolicyIdempotent :: Types.IPolicy -> Property

prop_Text_IPolicyIdempotent ipol =

  case Text.loadIPolicy . Utils.sepSplit '|' $

       Text.serializeIPolicy owner ipol of

    Types.Bad msg -> failTest $ "Failed to load ispec: " ++ msg

    Types.Ok res -> (owner, ipol) ==? res

  where owner = "dummy"

-- | This property, while being in the text tests, does more than just

-- test end-to-end the serialisation and loading back workflow; it

-- also tests the Loader.mergeData and the actuall

-- Cluster.iterateAlloc (for well-behaving w.r.t. instance

-- allocations, not for the business logic). As such, it's a quite

-- complex and slow test, and that's the reason we restrict it to

-- small cluster sizes.

prop_Text_CreateSerialise :: Property

prop_Text_CreateSerialise =

  forAll genTags $ \ctags ->

  forAll (choose (1, 20)) $ \maxiter ->

  forAll (choose (2, 10)) $ \count ->

  forAll genOnlineNode $ \node ->

  forAll (genInstanceSmallerThanNode node) $ \inst ->

  let nl = makeSmallCluster node count

      reqnodes = Instance.requiredNodes $ Instance.diskTemplate inst

  in case Cluster.genAllocNodes defGroupList nl reqnodes True >>= \allocn ->

     Cluster.iterateAlloc nl Container.empty (Just maxiter) inst allocn [] []

     of

       Types.Bad msg -> failTest $ "Failed to allocate: " ++ msg

       Types.Ok (_, _, _, [], _) -> printTestCase

                                    "Failed to allocate: no allocations" False

       Types.Ok (_, nl', il', _, _) ->

         let cdata = Loader.ClusterData defGroupList nl' il' ctags

                     Types.defIPolicy

             saved = Text.serializeCluster cdata

         in case Text.parseData saved >>= Loader.mergeData [] [] [] [] of

              Types.Bad msg -> failTest $ "Failed to load/merge: " ++ msg

              Types.Ok (Loader.ClusterData gl2 nl2 il2 ctags2 cpol2) ->

                ctags ==? ctags2 .&&.

                Types.defIPolicy ==? cpol2 .&&.

                il' ==? il2 .&&.

                defGroupList ==? gl2 .&&.

                nl' ==? nl2

testSuite "Text"

            [ 'prop_Text_Load_Instance

            , 'prop_Text_Load_InstanceFail

            , 'prop_Text_Load_Node

            , 'prop_Text_Load_NodeFail

            , 'prop_Text_NodeLSIdempotent

            , 'prop_Text_ISpecIdempotent

            , 'prop_Text_IPolicyIdempotent

            , 'prop_Text_CreateSerialise

            ]

-- *** Simu backend

-- | Generates a tuple of specs for simulation.

genSimuSpec :: Gen (String, Int, Int, Int, Int)

genSimuSpec = do

  pol <- elements [C.allocPolicyPreferred,

                   C.allocPolicyLastResort, C.allocPolicyUnallocable,

                  "p", "a", "u"]

 -- should be reasonable (nodes/group), bigger values only complicate

 -- the display of failed tests, and we don't care (in this particular

 -- test) about big node groups

  nodes <- choose (0, 20)

  dsk <- choose (0, maxDsk)

  mem <- choose (0, maxMem)

  cpu <- choose (0, maxCpu)

  return (pol, nodes, dsk, mem, cpu)

-- | Checks that given a set of corrects specs, we can load them

-- successfully, and that at high-level the values look right.

prop_Simu_Load :: Property

prop_Simu_Load =

  forAll (choose (0, 10)) $ \ngroups ->

  forAll (replicateM ngroups genSimuSpec) $ \specs ->

  let strspecs = map (\(p, n, d, m, c) -> printf "%s,%d,%d,%d,%d"

                                          p n d m c::String) specs

      totnodes = sum $ map (\(_, n, _, _, _) -> n) specs

      mdc_in = concatMap (\(_, n, d, m, c) ->

                            replicate n (fromIntegral m, fromIntegral d,

                                         fromIntegral c,

                                         fromIntegral m, fromIntegral d))

               specs :: [(Double, Double, Double, Int, Int)]

  in case Simu.parseData strspecs of

       Types.Bad msg -> failTest $ "Failed to load specs: " ++ msg

       Types.Ok (Loader.ClusterData gl nl il tags ipol) ->

         let nodes = map snd $ IntMap.toAscList nl

             nidx = map Node.idx nodes

             mdc_out = map (\n -> (Node.tMem n, Node.tDsk n, Node.tCpu n,

                                   Node.fMem n, Node.fDsk n)) nodes

         in

         Container.size gl ==? ngroups .&&.

         Container.size nl ==? totnodes .&&.

         Container.size il ==? 0 .&&.

         length tags ==? 0 .&&.

         ipol ==? Types.defIPolicy .&&.

         nidx ==? [1..totnodes] .&&.

         mdc_in ==? mdc_out .&&.

         map Group.iPolicy (Container.elems gl) ==?

             replicate ngroups Types.defIPolicy

testSuite "Simu"

            [ 'prop_Simu_Load

            ]

-- ** Node tests

prop_Node_setAlias :: Node.Node -> String -> Bool

prop_Node_setAlias node name =

  Node.name newnode == Node.name node &&

  Node.alias newnode == name

    where newnode = Node.setAlias node name

prop_Node_setOffline :: Node.Node -> Bool -> Property

prop_Node_setOffline node status =

  Node.offline newnode ==? status

    where newnode = Node.setOffline node status

prop_Node_setXmem :: Node.Node -> Int -> Property

prop_Node_setXmem node xm =

  Node.xMem newnode ==? xm

    where newnode = Node.setXmem node xm

prop_Node_setMcpu :: Node.Node -> Double -> Property

prop_Node_setMcpu node mc =

  Types.iPolicyVcpuRatio (Node.iPolicy newnode) ==? mc

    where newnode = Node.setMcpu node mc

-- | Check that an instance add with too high memory or disk will be

-- rejected.

prop_Node_addPriFM :: Node.Node -> Instance.Instance -> Property

prop_Node_addPriFM node inst =

  Instance.mem inst >= Node.fMem node && not (Node.failN1 node) &&

  not (Instance.isOffline inst) ==>

  case Node.addPri node inst'' of

    Types.OpFail Types.FailMem -> True

    _ -> False

  where inst' = setInstanceSmallerThanNode node inst

        inst'' = inst' { Instance.mem = Instance.mem inst }

-- | Check that adding a primary instance with too much disk fails

-- with type FailDisk.

prop_Node_addPriFD :: Node.Node -> Instance.Instance -> Property

prop_Node_addPriFD node inst =

  forAll (elements Instance.localStorageTemplates) $ \dt ->

  Instance.dsk inst >= Node.fDsk node && not (Node.failN1 node) ==>

  let inst' = setInstanceSmallerThanNode node inst

      inst'' = inst' { Instance.dsk = Instance.dsk inst

                     , Instance.diskTemplate = dt }

  in case Node.addPri node inst'' of

       Types.OpFail Types.FailDisk -> True

       _ -> False

-- | Check that adding a primary instance with too many VCPUs fails

-- with type FailCPU.

prop_Node_addPriFC :: Property

prop_Node_addPriFC =

  forAll (choose (1, maxCpu)) $ \extra ->

  forAll genOnlineNode $ \node ->

  forAll (arbitrary `suchThat` Instance.notOffline) $ \inst ->

  let inst' = setInstanceSmallerThanNode node inst

      inst'' = inst' { Instance.vcpus = Node.availCpu node + extra }

  in case Node.addPri node inst'' of

       Types.OpFail Types.FailCPU -> property True

       v -> failTest $ "Expected OpFail FailCPU, but got " ++ show v

-- | Check that an instance add with too high memory or disk will be

-- rejected.

prop_Node_addSec :: Node.Node -> Instance.Instance -> Int -> Property

prop_Node_addSec node inst pdx =

  ((Instance.mem inst >= (Node.fMem node - Node.rMem node) &&

    not (Instance.isOffline inst)) ||

   Instance.dsk inst >= Node.fDsk node) &&

  not (Node.failN1 node) ==>

      isFailure (Node.addSec node inst pdx)

-- | Check that an offline instance with reasonable disk size but

-- extra mem/cpu can always be added.

prop_Node_addOfflinePri :: NonNegative Int -> NonNegative Int -> Property

prop_Node_addOfflinePri (NonNegative extra_mem) (NonNegative extra_cpu) =

  forAll genOnlineNode $ \node ->

  forAll (genInstanceSmallerThanNode node) $ \inst ->

  let inst' = inst { Instance.runSt = Types.AdminOffline

                   , Instance.mem = Node.availMem node + extra_mem

                   , Instance.vcpus = Node.availCpu node + extra_cpu }

  in case Node.addPri node inst' of

       Types.OpGood _ -> property True

       v -> failTest $ "Expected OpGood, but got: " ++ show v

-- | Check that an offline instance with reasonable disk size but

-- extra mem/cpu can always be added.

prop_Node_addOfflineSec :: NonNegative Int -> NonNegative Int

                        -> Types.Ndx -> Property

prop_Node_addOfflineSec (NonNegative extra_mem) (NonNegative extra_cpu) pdx =

  forAll genOnlineNode $ \node ->

  forAll (genInstanceSmallerThanNode node) $ \inst ->

  let inst' = inst { Instance.runSt = Types.AdminOffline

                   , Instance.mem = Node.availMem node + extra_mem

                   , Instance.vcpus = Node.availCpu node + extra_cpu

                   , Instance.diskTemplate = Types.DTDrbd8 }

  in case Node.addSec node inst' pdx of

       Types.OpGood _ -> property True

       v -> failTest $ "Expected OpGood/OpGood, but got: " ++ show v

-- | Checks for memory reservation changes.

prop_Node_rMem :: Instance.Instance -> Property

prop_Node_rMem inst =

  not (Instance.isOffline inst) ==>

  forAll (genOnlineNode `suchThat` ((> Types.unitMem) . Node.fMem)) $ \node ->

  -- ab = auto_balance, nb = non-auto_balance

  -- we use -1 as the primary node of the instance

  let inst' = inst { Instance.pNode = -1, Instance.autoBalance = True

                   , Instance.diskTemplate = Types.DTDrbd8 }

      inst_ab = setInstanceSmallerThanNode node inst'

      inst_nb = inst_ab { Instance.autoBalance = False }

      -- now we have the two instances, identical except the

      -- autoBalance attribute

      orig_rmem = Node.rMem node

      inst_idx = Instance.idx inst_ab

      node_add_ab = Node.addSec node inst_ab (-1)

      node_add_nb = Node.addSec node inst_nb (-1)

      node_del_ab = liftM (`Node.removeSec` inst_ab) node_add_ab

      node_del_nb = liftM (`Node.removeSec` inst_nb) node_add_nb

  in case (node_add_ab, node_add_nb, node_del_ab, node_del_nb) of

       (Types.OpGood a_ab, Types.OpGood a_nb,

        Types.OpGood d_ab, Types.OpGood d_nb) ->

         printTestCase "Consistency checks failed" $

           Node.rMem a_ab >  orig_rmem &&

           Node.rMem a_ab - orig_rmem == Instance.mem inst_ab &&

           Node.rMem a_nb == orig_rmem &&

           Node.rMem d_ab == orig_rmem &&

           Node.rMem d_nb == orig_rmem &&

           -- this is not related to rMem, but as good a place to

           -- test as any

           inst_idx `elem` Node.sList a_ab &&

           inst_idx `notElem` Node.sList d_ab

       x -> failTest $ "Failed to add/remove instances: " ++ show x

-- | Check mdsk setting.

prop_Node_setMdsk :: Node.Node -> SmallRatio -> Bool

prop_Node_setMdsk node mx =

  Node.loDsk node' >= 0 &&

  fromIntegral (Node.loDsk node') <= Node.tDsk node &&

  Node.availDisk node' >= 0 &&

  Node.availDisk node' <= Node.fDsk node' &&

  fromIntegral (Node.availDisk node') <= Node.tDsk node' &&

  Node.mDsk node' == mx'

    where node' = Node.setMdsk node mx'

          SmallRatio mx' = mx

-- Check tag maps

prop_Node_tagMaps_idempotent :: Property

prop_Node_tagMaps_idempotent =

  forAll genTags $ \tags ->

  Node.delTags (Node.addTags m tags) tags ==? m

    where m = Map.empty

prop_Node_tagMaps_reject :: Property

prop_Node_tagMaps_reject =

  forAll (genTags `suchThat` (not . null)) $ \tags ->

  let m = Node.addTags Map.empty tags

  in all (\t -> Node.rejectAddTags m [t]) tags

prop_Node_showField :: Node.Node -> Property

prop_Node_showField node =

  forAll (elements Node.defaultFields) $ \ field ->

  fst (Node.showHeader field) /= Types.unknownField &&

  Node.showField node field /= Types.unknownField

prop_Node_computeGroups :: [Node.Node] -> Bool

prop_Node_computeGroups nodes =

  let ng = Node.computeGroups nodes

      onlyuuid = map fst ng

  in length nodes == sum (map (length . snd) ng) &&

     all (\(guuid, ns) -> all ((== guuid) . Node.group) ns) ng &&

     length (nub onlyuuid) == length onlyuuid &&

     (null nodes || not (null ng))

-- Check idempotence of add/remove operations

prop_Node_addPri_idempotent :: Property

prop_Node_addPri_idempotent =

  forAll genOnlineNode $ \node ->

  forAll (genInstanceSmallerThanNode node) $ \inst ->

  case Node.addPri node inst of

    Types.OpGood node' -> Node.removePri node' inst ==? node

    _ -> failTest "Can't add instance"

prop_Node_addSec_idempotent :: Property

prop_Node_addSec_idempotent =

  forAll genOnlineNode $ \node ->

  forAll (genInstanceSmallerThanNode node) $ \inst ->

  let pdx = Node.idx node + 1

      inst' = Instance.setPri inst pdx

      inst'' = inst' { Instance.diskTemplate = Types.DTDrbd8 }

  in case Node.addSec node inst'' pdx of

       Types.OpGood node' -> Node.removeSec node' inst'' ==? node

       _ -> failTest "Can't add instance"

testSuite "Node"

            [ 'prop_Node_setAlias

            , 'prop_Node_setOffline

            , 'prop_Node_setMcpu

            , 'prop_Node_setXmem

            , 'prop_Node_addPriFM

            , 'prop_Node_addPriFD

            , 'prop_Node_addPriFC

            , 'prop_Node_addSec

            , 'prop_Node_addOfflinePri

            , 'prop_Node_addOfflineSec

            , 'prop_Node_rMem

            , 'prop_Node_setMdsk

            , 'prop_Node_tagMaps_idempotent

            , 'prop_Node_tagMaps_reject

            , 'prop_Node_showField

            , 'prop_Node_computeGroups

            , 'prop_Node_addPri_idempotent

            , 'prop_Node_addSec_idempotent

            ]

-- ** Cluster tests

-- | Check that the cluster score is close to zero for a homogeneous

-- cluster.

prop_Cluster_Score_Zero :: Node.Node -> Property

prop_Cluster_Score_Zero node =

  forAll (choose (1, 1024)) $ \count ->

    (not (Node.offline node) && not (Node.failN1 node) && (count > 0) &&

     (Node.tDsk node > 0) && (Node.tMem node > 0)) ==>

  let fn = Node.buildPeers node Container.empty

      nlst = replicate count fn

      score = Cluster.compCVNodes nlst

  -- we can't say == 0 here as the floating point errors accumulate;

  -- this should be much lower than the default score in CLI.hs

  in score <= 1e-12

-- | Check that cluster stats are sane.

prop_Cluster_CStats_sane :: Property

prop_Cluster_CStats_sane =

  forAll (choose (1, 1024)) $ \count ->

  forAll genOnlineNode $ \node ->

  let fn = Node.buildPeers node Container.empty

      nlst = zip [1..] $ replicate count fn::[(Types.Ndx, Node.Node)]

      nl = Container.fromList nlst

      cstats = Cluster.totalResources nl

  in Cluster.csAdsk cstats >= 0 &&

     Cluster.csAdsk cstats <= Cluster.csFdsk cstats

-- | Check that one instance is allocated correctly, without

-- rebalances needed.

prop_Cluster_Alloc_sane :: Instance.Instance -> Property

prop_Cluster_Alloc_sane inst =

  forAll (choose (5, 20)) $ \count ->

  forAll genOnlineNode $ \node ->

  let (nl, il, inst') = makeSmallEmptyCluster node count inst

      reqnodes = Instance.requiredNodes $ Instance.diskTemplate inst

  in case Cluster.genAllocNodes defGroupList nl reqnodes True >>=

     Cluster.tryAlloc nl il inst' of

       Types.Bad _ -> False

       Types.Ok as ->

         case Cluster.asSolution as of

           Nothing -> False

           Just (xnl, xi, _, cv) ->

             let il' = Container.add (Instance.idx xi) xi il

                 tbl = Cluster.Table xnl il' cv []

             in not (canBalance tbl True True False)

-- | Checks that on a 2-5 node cluster, we can allocate a random

-- instance spec via tiered allocation (whatever the original instance

-- spec), on either one or two nodes. Furthermore, we test that

-- computed allocation statistics are correct.

prop_Cluster_CanTieredAlloc :: Instance.Instance -> Property

prop_Cluster_CanTieredAlloc inst =

  forAll (choose (2, 5)) $ \count ->

  forAll (genOnlineNode `suchThat` (isNodeBig 4)) $ \node ->

  let nl = makeSmallCluster node count

      il = Container.empty

      rqnodes = Instance.requiredNodes $ Instance.diskTemplate inst

      allocnodes = Cluster.genAllocNodes defGroupList nl rqnodes True

  in case allocnodes >>= \allocnodes' ->

    Cluster.tieredAlloc nl il (Just 1) inst allocnodes' [] [] of

       Types.Bad msg -> failTest $ "Failed to tiered alloc: " ++ msg

       Types.Ok (_, nl', il', ixes, cstats) ->

         let (ai_alloc, ai_pool, ai_unav) =

               Cluster.computeAllocationDelta

                (Cluster.totalResources nl)

                (Cluster.totalResources nl')

             all_nodes = Container.elems nl

         in property (not (null ixes)) .&&.

            IntMap.size il' ==? length ixes .&&.

            length ixes ==? length cstats .&&.

            sum (map Types.allocInfoVCpus [ai_alloc, ai_pool, ai_unav]) ==?

              sum (map Node.hiCpu all_nodes) .&&.

            sum (map Types.allocInfoNCpus [ai_alloc, ai_pool, ai_unav]) ==?

              sum (map Node.tCpu all_nodes) .&&.

            sum (map Types.allocInfoMem [ai_alloc, ai_pool, ai_unav]) ==?

              truncate (sum (map Node.tMem all_nodes)) .&&.

            sum (map Types.allocInfoDisk [ai_alloc, ai_pool, ai_unav]) ==?

              truncate (sum (map Node.tDsk all_nodes))

-- | Helper function to create a cluster with the given range of nodes

-- and allocate an instance on it.

genClusterAlloc :: Int -> Node.Node -> Instance.Instance

                -> Types.Result (Node.List, Instance.List, Instance.Instance)

genClusterAlloc count node inst =

  let nl = makeSmallCluster node count

      reqnodes = Instance.requiredNodes $ Instance.diskTemplate inst

  in case Cluster.genAllocNodes defGroupList nl reqnodes True >>=

     Cluster.tryAlloc nl Container.empty inst of

       Types.Bad _ -> Types.Bad "Can't allocate"

       Types.Ok as ->

         case Cluster.asSolution as of

           Nothing -> Types.Bad "Empty solution?"

           Just (xnl, xi, _, _) ->

             let xil = Container.add (Instance.idx xi) xi Container.empty

             in Types.Ok (xnl, xil, xi)

-- | Checks that on a 4-8 node cluster, once we allocate an instance,

-- we can also relocate it.

prop_Cluster_AllocRelocate :: Property

prop_Cluster_AllocRelocate =

  forAll (choose (4, 8)) $ \count ->

  forAll (genOnlineNode `suchThat` (isNodeBig 4)) $ \node ->

  forAll (genInstanceSmallerThanNode node `suchThat` isMirrored) $ \inst ->

  case genClusterAlloc count node inst of

    Types.Bad msg -> failTest msg

    Types.Ok (nl, il, inst') ->

      case IAlloc.processRelocate defGroupList nl il

             (Instance.idx inst) 1

             [(if Instance.diskTemplate inst' == Types.DTDrbd8

                 then Instance.sNode

                 else Instance.pNode) inst'] of

        Types.Ok _ -> property True

        Types.Bad msg -> failTest $ "Failed to relocate: " ++ msg

-- | Helper property checker for the result of a nodeEvac or

-- changeGroup operation.

check_EvacMode :: Group.Group -> Instance.Instance

               -> Types.Result (Node.List, Instance.List, Cluster.EvacSolution)

               -> Property

check_EvacMode grp inst result =

  case result of

    Types.Bad msg -> failTest $ "Couldn't evacuate/change group:" ++ msg

    Types.Ok (_, _, es) ->

      let moved = Cluster.esMoved es

          failed = Cluster.esFailed es

          opcodes = not . null $ Cluster.esOpCodes es

      in failmsg ("'failed' not empty: " ++ show failed) (null failed) .&&.

         failmsg "'opcodes' is null" opcodes .&&.

         case moved of

           [(idx', gdx, _)] -> failmsg "invalid instance moved" (idx == idx')

                               .&&.

                               failmsg "wrong target group"

                                         (gdx == Group.idx grp)

           v -> failmsg  ("invalid solution: " ++ show v) False

  where failmsg :: String -> Bool -> Property

        failmsg = \msg -> printTestCase ("Failed to evacuate: " ++ msg)

        idx = Instance.idx inst

-- | Checks that on a 4-8 node cluster, once we allocate an instance,

-- we can also node-evacuate it.

prop_Cluster_AllocEvacuate :: Property

prop_Cluster_AllocEvacuate =

  forAll (choose (4, 8)) $ \count ->

  forAll (genOnlineNode `suchThat` (isNodeBig 4)) $ \node ->

  forAll (genInstanceSmallerThanNode node `suchThat` isMirrored) $ \inst ->

  case genClusterAlloc count node inst of

    Types.Bad msg -> failTest msg

    Types.Ok (nl, il, inst') ->

      conjoin . map (\mode -> check_EvacMode defGroup inst' $

                              Cluster.tryNodeEvac defGroupList nl il mode

                                [Instance.idx inst']) .

                              evacModeOptions .

                              Instance.mirrorType $ inst'

-- | Checks that on a 4-8 node cluster with two node groups, once we

-- allocate an instance on the first node group, we can also change

-- its group.

prop_Cluster_AllocChangeGroup :: Property

prop_Cluster_AllocChangeGroup =

  forAll (choose (4, 8)) $ \count ->

  forAll (genOnlineNode `suchThat` (isNodeBig 4)) $ \node ->

  forAll (genInstanceSmallerThanNode node `suchThat` isMirrored) $ \inst ->

  case genClusterAlloc count node inst of

    Types.Bad msg -> failTest msg

    Types.Ok (nl, il, inst') ->

      -- we need to add a second node group and nodes to the cluster

      let nl2 = Container.elems $ makeSmallCluster node count

          grp2 = Group.setIdx defGroup (Group.idx defGroup + 1)

          maxndx = maximum . map Node.idx $ nl2

          nl3 = map (\n -> n { Node.group = Group.idx grp2

                             , Node.idx = Node.idx n + maxndx }) nl2

          nl4 = Container.fromList . map (\n -> (Node.idx n, n)) $ nl3

          gl' = Container.add (Group.idx grp2) grp2 defGroupList

          nl' = IntMap.union nl nl4

      in check_EvacMode grp2 inst' $

         Cluster.tryChangeGroup gl' nl' il [] [Instance.idx inst']

-- | Check that allocating multiple instances on a cluster, then

-- adding an empty node, results in a valid rebalance.

prop_Cluster_AllocBalance :: Property

prop_Cluster_AllocBalance =

  forAll (genNode (Just 5) (Just 128)) $ \node ->

  forAll (choose (3, 5)) $ \count ->

  not (Node.offline node) && not (Node.failN1 node) ==>

  let nl = makeSmallCluster node count

      (hnode, nl') = IntMap.deleteFindMax nl

      il = Container.empty

      allocnodes = Cluster.genAllocNodes defGroupList nl' 2 True

      i_templ = createInstance Types.unitMem Types.unitDsk Types.unitCpu

  in case allocnodes >>= \allocnodes' ->

    Cluster.iterateAlloc nl' il (Just 5) i_templ allocnodes' [] [] of

       Types.Bad msg -> failTest $ "Failed to allocate: " ++ msg

       Types.Ok (_, _, _, [], _) -> failTest "Failed to allocate: no instances"

       Types.Ok (_, xnl, il', _, _) ->

         let ynl = Container.add (Node.idx hnode) hnode xnl