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ouroboros-consensus-diffusion/test/consensus-test/Test/Consensus/Genesis/Tests/CSJ.hs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| {-# LANGUAGE LambdaCase #-} | ||
| {-# LANGUAGE NamedFieldPuns #-} | ||
|
|
||
| module Test.Consensus.Genesis.Tests.CSJ (tests) where | ||
|
|
||
| import Control.Monad (replicateM) | ||
| import Data.Functor (($>)) | ||
| import Data.List (nub) | ||
| import Data.Maybe (mapMaybe) | ||
| import Ouroboros.Consensus.MiniProtocol.ChainSync.Client | ||
| (TraceChainSyncClientEvent (..)) | ||
| import Ouroboros.Consensus.Util.Condense (PaddingDirection (..), | ||
| condenseListWithPadding) | ||
| import Test.Consensus.Genesis.Setup | ||
| import Test.Consensus.Genesis.Tests.Uniform (genUniformSchedulePoints) | ||
| import Test.Consensus.PeerSimulator.Run (SchedulerConfig (..), | ||
| defaultSchedulerConfig) | ||
| import Test.Consensus.PeerSimulator.StateView (StateView (..)) | ||
| import Test.Consensus.PeerSimulator.Trace (TraceEvent (..)) | ||
| import Test.Consensus.PointSchedule | ||
| import Test.Consensus.PointSchedule.Peers (Peer (..), Peers (..), | ||
| mkPeers) | ||
| import Test.Consensus.PointSchedule.Shrinking (shrinkPeerSchedules) | ||
| import Test.Tasty | ||
| import Test.Tasty.QuickCheck | ||
| import Test.Util.Orphans.IOLike () | ||
| import Test.Util.TestBlock (TestBlock) | ||
|
|
||
| tests :: TestTree | ||
| tests = | ||
| testGroup | ||
| "CSJ" | ||
| [ testProperty "\"Happy Path\" synchronous scenario only speaks to one peer" $ prop_happyPath True | ||
| , testProperty "\"Happy Path\" asynchronous scenario only speaks to one peer" $ prop_happyPath False | ||
| ] | ||
|
|
||
| prop_happyPath :: Bool -> Property | ||
| prop_happyPath synchronized = | ||
| forAllGenesisTest | ||
| ( do | ||
| gt <- genChains $ pure 0 | ||
| honest <- genHonestSchedule gt | ||
| numOthers <- choose (0, 3) | ||
| otherHonests <- if synchronized | ||
| then pure $ replicate numOthers honest | ||
| else replicateM numOthers (genHonestSchedule gt) | ||
| pure $ gt $> mkPeers honest otherHonests | ||
| ) | ||
| ( defaultSchedulerConfig | ||
| { scEnableCSJ = True | ||
| , scEnableLoE = True | ||
| , scEnableLoP = True | ||
| } | ||
| ) | ||
| shrinkPeerSchedules | ||
| ( \_ StateView{svTrace} -> | ||
| let | ||
| headerDownloadEvents = | ||
| mapMaybe | ||
| (\case | ||
| TraceChainSyncClientEvent pid (TraceDownloadedHeader hdr) -> Just (pid, hdr) | ||
| _ -> Nothing | ||
| ) | ||
| svTrace | ||
| receivedHeadersOnlyOnce = length (nub $ snd <$> headerDownloadEvents) == length headerDownloadEvents | ||
| receivedHeadersFromOnlyOnePeer = length (nub $ fst <$> headerDownloadEvents) == 1 | ||
| in | ||
| counterexample | ||
| ("Downloaded headers:\n" ++ | ||
| ( unlines $ fmap (" " ++) $ zipWith | ||
| (\peer header -> peer ++ " | " ++ header) | ||
| (condenseListWithPadding PadRight $ fst <$> headerDownloadEvents) | ||
| (condenseListWithPadding PadRight $ snd <$> headerDownloadEvents) | ||
| ) | ||
| ) | ||
| (receivedHeadersOnlyOnce && receivedHeadersFromOnlyOnePeer) | ||
| ) | ||
| where | ||
| -- | This might seem wasteful, as we discard generated adversarial schedules. | ||
| -- It actually isn't, since we call it on trees that have no branches besides | ||
| -- the trunk, so no adversaries are generated. | ||
| genHonestSchedule :: GenesisTest TestBlock () -> Gen (PeerSchedule TestBlock) | ||
| genHonestSchedule gt = do | ||
| ps <- genUniformSchedulePoints gt | ||
| pure $ value $ honest ps |