Commit 3469663d authored by Klaus Aehlig's avatar Klaus Aehlig

Verify Basic property for lock allocation

Verify the minimal consistency property for any form
of lock handling: if a user holds an exclusive lock,
then no other user can hold the same lock (neither
exclusively, nor shared).
Signed-off-by: default avatarKlaus Aehlig <aehlig@google.com>
Reviewed-by: default avatarPetr Pudlak <pudlak@google.com>
parent 15208e95
......@@ -147,6 +147,7 @@ HS_DIRS = \
test/hs/Test/Ganeti/HTools/Backend \
test/hs/Test/Ganeti/Hypervisor \
test/hs/Test/Ganeti/Hypervisor/Xen \
test/hs/Test/Ganeti/Locking \
test/hs/Test/Ganeti/Query \
test/hs/Test/Ganeti/THH
......@@ -809,6 +810,7 @@ HS_TEST_SRCS = \
test/hs/Test/Ganeti/JQueue.hs \
test/hs/Test/Ganeti/Kvmd.hs \
test/hs/Test/Ganeti/Luxi.hs \
test/hs/Test/Ganeti/Locking/Allocation.hs \
test/hs/Test/Ganeti/Network.hs \
test/hs/Test/Ganeti/Objects.hs \
test/hs/Test/Ganeti/OpCodes.hs \
......
{-# LANGUAGE TemplateHaskell #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
{-| Tests for lock allocation.
-}
{-
Copyright (C) 2014 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.Locking.Allocation (testLocking_Allocation) where
import Control.Applicative
import qualified Data.Map as M
import qualified Data.Set as S
import Test.QuickCheck
import Test.Ganeti.TestHelper
import Ganeti.Locking.Allocation
{-
Ganeti.Locking.Allocation is polymorphic in the types of locks
and lock owners. So we can use much simpler types here than Ganeti's
real locks and lock owners, knowning at polymorphic functions cannot
exploit the simplicity of the types they're deling with.
-}
data TestOwner = TestOwner Int deriving (Ord, Eq, Show)
instance Arbitrary TestOwner where
arbitrary = TestOwner <$> choose (0, 7)
data TestLock = TestLock Int deriving (Ord, Eq, Show)
instance Arbitrary TestLock where
arbitrary = TestLock <$> choose (0, 7)
{-
All states of a LockAllocation can be obtained by starting from the
empty allocation, and sequentially requesting (successfully or not)
lock updates. So we first define what arbitrary updates sequences are.
-}
instance Arbitrary OwnerState where
arbitrary = elements [OwnShared, OwnExclusive]
instance Arbitrary a => Arbitrary (LockRequest a) where
arbitrary = LockRequest <$> arbitrary <*> genMaybe arbitrary
data UpdateRequest a b = UpdateRequest a [LockRequest b] deriving Show
instance (Arbitrary a, Arbitrary b) => Arbitrary (UpdateRequest a b) where
arbitrary = UpdateRequest <$> arbitrary <*> arbitrary
-- | Fold a sequence of update requests; all allocationscan be obtained in
-- this way, starting from the empty allocation.
foldUpdates :: (Ord a, Ord b, Show b)
=> LockAllocation b a -> [UpdateRequest a b] -> LockAllocation b a
foldUpdates = foldl (\s (UpdateRequest owner updates) ->
fst $ updateLocks owner updates s)
instance (Arbitrary a, Arbitrary b, Ord a, Ord b, Show a, Show b)
=> Arbitrary (LockAllocation a b) where
arbitrary = foldUpdates emptyAllocation <$> arbitrary
-- | Basic property of locking: the exclusive locks of one user
-- are disjoint from any locks of any other user.
prop_LocksDisjoint :: Property
prop_LocksDisjoint =
forAll (arbitrary :: Gen (LockAllocation TestLock TestOwner)) $ \state ->
forAll (arbitrary :: Gen TestOwner) $ \a ->
forAll (arbitrary `suchThat` (/= a)) $ \b ->
let aExclusive = M.keysSet . M.filter (== OwnExclusive) $ listLocks a state
bAll = M.keysSet $ listLocks b state
in printTestCase
(show a ++ "'s exclusive lock" ++ " is not respected by " ++ show b)
(S.null $ S.intersection aExclusive bAll)
testSuite "Locking/Allocation"
[ 'prop_LocksDisjoint
]
......@@ -56,6 +56,7 @@ import Test.Ganeti.JSON
import Test.Ganeti.Jobs
import Test.Ganeti.JQueue
import Test.Ganeti.Kvmd
import Test.Ganeti.Locking.Allocation
import Test.Ganeti.Luxi
import Test.Ganeti.Network
import Test.Ganeti.Objects
......@@ -121,6 +122,7 @@ allTests =
, testJobs
, testJQueue
, testKvmd
, testLocking_Allocation
, testLuxi
, testNetwork
, testObjects
......
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