// Copyright 2018-2025 The NATS Authors
// Licensed under the Apache License, Version 2.0
//
// NoRace integration tests - corresponds to Go file:
//   golang/nats-server/server/norace_1_test.go (first 51 tests)
//
// These tests are equivalent to Go's //go:build !race tests.
// All tests require NATS_INTEGRATION_ENABLED=true to run.
// Set [Trait("Category", "NoRace")] in addition to the base "Integration" trait.

using System.Net;
using System.Net.Sockets;
using Shouldly;
using Xunit.Abstractions;
using ZB.MOM.NatsNet.Server.IntegrationTests.Helpers;

namespace ZB.MOM.NatsNet.Server.IntegrationTests.NoRace;

[Trait("Category", "NoRace")]
[Trait("Category", "Integration")]
public class NoRace1Tests : IntegrationTestBase
{
    public NoRace1Tests(ITestOutputHelper output) : base(output) { }

    // ---------------------------------------------------------------------------
    // 1. TestNoRaceAvoidSlowConsumerBigMessages
    // Verifies that 500 large (1MB) messages are delivered to a subscriber
    // without triggering slow-consumer status on the server.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running NATS server")]
    public void AvoidSlowConsumerBigMessages_ShouldSucceed()
    {
        // Port of Go TestNoRaceAvoidSlowConsumerBigMessages:
        // 500 x 1MB messages delivered to subscriber without triggering slow-consumer
    }

    // ---------------------------------------------------------------------------
    // 2. TestNoRaceRoutedQueueAutoUnsubscribe
    // Two-server cluster. Creates 100 queue subs with AutoUnsubscribe(1) per server
    // for groups "bar" and "baz". Publishes 200 messages and verifies all are received
    // exactly once by each queue group.
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task RoutedQueueAutoUnsubscribe_ShouldSucceed()
    {
        Skip.If(!IntegrationEnabled, SkipMessage);
        Output.WriteLine("RoutedQueueAutoUnsubscribe requires a 2-server routed cluster — skipping unless cluster is configured.");
        Skip.If(true, "Requires 2-server routed cluster infrastructure");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 3. TestNoRaceClosedSlowConsumerWriteDeadline
    // Connects a slow raw TCP subscriber (1MB payload, 10ms write deadline).
    // Publishes 100 x 1MB messages. Verifies server closes the connection and
    // records it as SlowConsumerWriteDeadline.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running NATS server")]
    public void ClosedSlowConsumerWriteDeadline_ShouldSucceed()
    {
        // Port of Go TestNoRaceClosedSlowConsumerWriteDeadline:
        // Raw TCP slow subscriber, server closes connection via write deadline
    }

    // ---------------------------------------------------------------------------
    // 4. TestNoRaceClosedSlowConsumerPendingBytes
    // Same as above but triggers via MaxPending (1MB) rather than write deadline.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running NATS server")]
    public void ClosedSlowConsumerPendingBytes_ShouldSucceed()
    {
        // Port of Go TestNoRaceClosedSlowConsumerPendingBytes:
        // Raw TCP slow subscriber, server closes connection via MaxPending
    }

    // ---------------------------------------------------------------------------
    // 5. TestNoRaceSlowConsumerPendingBytes
    // After server closes the slow consumer connection, verifies that writing to
    // the closed socket eventually returns an error.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running NATS server")]
    public void SlowConsumerPendingBytes_ShouldSucceed()
    {
        // Port of Go TestNoRaceSlowConsumerPendingBytes:
        // After server closes slow consumer, writes to closed socket return error
    }

    // ---------------------------------------------------------------------------
    // 6. TestNoRaceGatewayNoMissingReplies
    // Complex 4-server gateway topology (A1, A2, B1, B2) verifying that
    // request-reply works correctly without missing replies across gateways
    // after interest-only mode is activated.
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task GatewayNoMissingReplies_ShouldSucceed()
    {
        Skip.If(!IntegrationEnabled, SkipMessage);
        Output.WriteLine("GatewayNoMissingReplies requires a 4-server gateway topology — skipping unless gateway infrastructure is configured.");
        Skip.If(true, "Requires 4-server gateway cluster infrastructure");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 7. TestNoRaceRouteMemUsage
    // Creates a 2-server cluster. Sends 100 requests with 50KB payloads via a
    // route. Measures heap usage before and after to ensure no memory leak
    // (after must be < 3x before).
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task RouteMemUsage_ShouldSucceed()
    {
        Skip.If(!IntegrationEnabled, SkipMessage);
        Output.WriteLine("RouteMemUsage requires a 2-server routed cluster");
        Skip.If(true, "Requires routed cluster infrastructure");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 8. TestNoRaceRouteCache
    // Verifies that the per-account route subscription cache correctly prunes
    // closed subscriptions and stays at or below maxPerAccountCacheSize.
    // Tests both plain sub and queue sub variants.
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task RouteCache_ShouldSucceed()
    {
        Skip.If(!IntegrationEnabled, SkipMessage);
        Output.WriteLine("RouteCache requires a 2-server routed cluster with internal server access");
        Skip.If(true, "Requires routed cluster infrastructure");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 9. TestNoRaceFetchAccountDoesNotRegisterAccountTwice
    // Uses a trusted gateway setup with a slow account resolver. Verifies that
    // concurrent account fetches do not register the account twice (race condition).
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task FetchAccountDoesNotRegisterAccountTwice_ShouldSucceed()
    {
        Skip.If(!IntegrationEnabled, SkipMessage);
        Output.WriteLine("FetchAccountDoesNotRegisterAccountTwice requires a trusted gateway setup");
        Skip.If(true, "Requires trusted gateway cluster infrastructure");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 10. TestNoRaceWriteDeadline
    // Connects a raw TCP subscriber with a 30ms write deadline.
    // Publishes 1000 x 1MB messages and verifies the server closes
    // the connection, causing subsequent writes to fail.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running NATS server")]
    public void WriteDeadline_ShouldSucceed()
    {
        // Port of Go TestNoRaceWriteDeadline:
        // Raw TCP subscriber, server closes connection via write deadline after 1000 x 1MB msgs
    }

    // ---------------------------------------------------------------------------
    // 11. TestNoRaceLeafNodeClusterNameConflictDeadlock
    // Sets up a hub server and 3 leaf-node servers (2 named clusterA, 1 unnamed).
    // Verifies that a cluster name conflict does not cause a deadlock.
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task LeafNodeClusterNameConflictDeadlock_ShouldSucceed()
    {
        Skip.If(!IntegrationEnabled, SkipMessage);
        Output.WriteLine("LeafNodeClusterNameConflictDeadlock requires leaf node + cluster infrastructure");
        Skip.If(true, "Requires leaf node cluster infrastructure");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 12. TestNoRaceAccountAddServiceImportRace
    // Delegates to TestAccountAddServiceImportRace — verifies that concurrent
    // AddServiceImport calls do not produce duplicate SIDs or subscription count errors.
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task AccountAddServiceImportRace_ShouldSucceed()
    {
        Skip.If(!IntegrationEnabled, SkipMessage);
        Output.WriteLine("AccountAddServiceImportRace requires service import infrastructure");
        Skip.If(true, "Requires service import server infrastructure");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 13. TestNoRaceQueueAutoUnsubscribe
    // Single server. Creates 1000 queue subs (bar + baz) with AutoUnsubscribe(1).
    // Publishes 1000 messages, verifies each queue group receives exactly 1000.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running NATS server")]
    public void QueueAutoUnsubscribe_ShouldSucceed()
    {
        // Port of Go TestNoRaceQueueAutoUnsubscribe:
        // 1000 queue subs per group with AutoUnsubscribe(1), each group receives 1000 msgs
    }

    // ---------------------------------------------------------------------------
    // 14. TestNoRaceAcceptLoopsDoNotLeaveOpenedConn
    // For each connection type (client, route, gateway, leafnode, websocket):
    // opens connections while the server is shutting down, verifies no connections
    // are left open (timeout error on read).
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task AcceptLoopsDoNotLeaveOpenedConn_ShouldSucceed()
    {
        Skip.If(!IntegrationEnabled, SkipMessage);
        Output.WriteLine("AcceptLoopsDoNotLeaveOpenedConn requires server shutdown timing test");
        Skip.If(true, "Requires server lifecycle control infrastructure");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 15. TestNoRaceJetStreamDeleteStreamManyConsumers
    // Creates a JetStream stream with 2000 consumers (all with DeliverSubject),
    // then deletes the stream. Verifies that delete does not hang (bug: sendq
    // size exceeded would cause deadlock).
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamDeleteStreamManyConsumers_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamDeleteStreamManyConsumers:
        // Stream with 2000 push consumers deleted without deadlock
    }

    // ---------------------------------------------------------------------------
    // 16. TestNoRaceJetStreamServiceImportAccountSwapIssue
    // Creates a JetStream stream and pull consumer. Runs concurrent publishing
    // and StreamInfo requests alongside fetch operations for 3 seconds. Verifies
    // no errors occur from account swap race condition.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamServiceImportAccountSwapIssue_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamServiceImportAccountSwapIssue:
        // Concurrent publish/info/fetch has no account swap race condition
    }

    // ---------------------------------------------------------------------------
    // 17. TestNoRaceJetStreamAPIStreamListPaging
    // Creates 2*JSApiNamesLimit (256) streams. Verifies that the stream list API
    // correctly pages results with offset parameter.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamAPIStreamListPaging_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamAPIStreamListPaging:
        // Stream list API paging with 256 streams, offset=0/128/256
    }

    // ---------------------------------------------------------------------------
    // 18. TestNoRaceJetStreamAPIConsumerListPaging
    // Creates JSApiNamesLimit (128) consumers on a stream. Verifies consumer list
    // paging with various offsets.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamAPIConsumerListPaging_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamAPIConsumerListPaging:
        // Consumer list paging with 128 consumers, offset=0/106/150
    }

    // ---------------------------------------------------------------------------
    // 19. TestNoRaceJetStreamWorkQueueLoadBalance
    // Creates a work queue stream with 25 worker goroutines. Publishes 1000 messages.
    // Verifies each worker receives approximately equal share (+/-50% + 5).
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamWorkQueueLoadBalance_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamWorkQueueLoadBalance:
        // 1000 msgs distributed across 25 workers, each within target ± delta
    }

    // ---------------------------------------------------------------------------
    // 20. TestNoRaceJetStreamClusterLargeStreamInlineCatchup
    // 3-server cluster. Shuts down one server, publishes 5000 messages. Kills
    // the stream leader. Restarts the first server. Verifies it catches up to
    // 5000 messages by becoming stream leader.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterLargeStreamInlineCatchup_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterLargeStreamInlineCatchup:
        // Server restart catches up to 5000 msgs by becoming stream leader
    }

    // ---------------------------------------------------------------------------
    // 21. TestNoRaceJetStreamClusterStreamCreateAndLostQuorum
    // 3-server cluster. Creates replicated stream. Stops all servers. Restarts
    // one. Subscribes to quorum-lost advisory. Restarts remaining servers.
    // Verifies no spurious quorum-lost advisory is received.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterStreamCreateAndLostQuorum_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterStreamCreateAndLostQuorum:
        // No spurious quorum-lost advisory after stop-all/restart-one/restart-remaining
    }

    // ---------------------------------------------------------------------------
    // 22. TestNoRaceJetStreamSuperClusterMirrors
    // 3-cluster x 3-server super-cluster. Creates source stream in C2, sends 100
    // msgs. Creates mirror M1 in C1, verifies 100 msgs. Purges source, sends 50
    // more. Creates M2 (replicas=3) in C3. Verifies catchup after stream leader
    // restart during concurrent publishing.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream super-cluster")]
    public void JetStreamSuperClusterMirrors_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamSuperClusterMirrors:
        // 3x3 super-cluster mirror catchup after stream leader restart
    }

    // ---------------------------------------------------------------------------
    // 23. TestNoRaceJetStreamSuperClusterMixedModeMirrors
    // 7-server super-cluster with mixed JetStream/non-JetStream nodes.
    // Creates 10 origin streams (1000 msgs each) then creates 10 mirrors
    // (replicas=3) in a loop 3 times, verifying each gets 1000 msgs.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream super-cluster")]
    public void JetStreamSuperClusterMixedModeMirrors_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamSuperClusterMixedModeMirrors:
        // Mixed-mode super-cluster, 10 origin streams x 10 mirrors x 3 iterations
    }

    // ---------------------------------------------------------------------------
    // 24. TestNoRaceJetStreamSuperClusterSources
    // 3x3 super-cluster. Creates 3 source streams (foo=10, bar=15, baz=25 msgs).
    // Creates aggregate stream MS sourcing all three — verifies 50 msgs.
    // Then purges, sends more, creates MS2 with replicas=3 in C3.
    // Verifies catchup after leader restart during concurrent publishing (200 msgs).
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream super-cluster")]
    public void JetStreamSuperClusterSources_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamSuperClusterSources:
        // 3x3 super-cluster sources aggregate, catchup after leader restart
    }

    // ---------------------------------------------------------------------------
    // 25. TestNoRaceJetStreamClusterSourcesMuxd
    // 3-server cluster. Creates 10 origin streams (10000 msgs each, 1KB payload).
    // Creates aggregate stream S sourcing all 10 (replicas=2).
    // Verifies S has 100,000 msgs total within 20 seconds.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterSourcesMuxd_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterSourcesMuxd:
        // Aggregate stream sourcing 10 origins, 100k msgs total
    }

    // ---------------------------------------------------------------------------
    // 26. TestNoRaceJetStreamSuperClusterMixedModeSources
    // 7-server mixed-mode super-cluster. Creates 100 origin streams (1000 msgs
    // each). Creates aggregate stream S (replicas=3) sourcing all 100 — 100,000
    // msgs. Repeats 3x with delete between iterations.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream super-cluster")]
    public void JetStreamSuperClusterMixedModeSources_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamSuperClusterMixedModeSources:
        // Mixed-mode super-cluster, 100 origin streams aggregated, 3 iterations
    }

    // ---------------------------------------------------------------------------
    // 27. TestNoRaceJetStreamClusterExtendedStreamPurgeStall
    // [skip(t) in Go — not run by default] Needs big machine.
    // Verifies that subject-filtered stream purge completes in < 1 second with
    // < 100MB memory usage (was ~7GB before fix).
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task JetStreamClusterExtendedStreamPurgeStall_ShouldSucceed()
    {
        Skip.If(true, "Explicitly skipped in Go source (skip(t)) — performance test requiring large machine");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 28. TestNoRaceJetStreamClusterMirrorExpirationAndMissingSequences
    // 9-server cluster. Creates source stream with 500ms MaxAge. Creates mirror
    // on a different server. Sends 10 msgs, verifies mirror has 10. Shuts down
    // mirror server, sends 10 more (they expire). Restarts mirror server.
    // Sends 10 more, verifies mirror has 20 (original 10 + last 10).
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterMirrorExpirationAndMissingSequences_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterMirrorExpirationAndMissingSequences:
        // 9-server cluster, mirror catches up after server restart with expired sequences
    }

    // ---------------------------------------------------------------------------
    // 29. TestNoRaceJetStreamClusterLargeActiveOnReplica
    // [skip(t) in Go — not run by default]
    // Verifies that stream replica active time is never > 5s (performance test).
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task JetStreamClusterLargeActiveOnReplica_ShouldSucceed()
    {
        Skip.If(true, "Explicitly skipped in Go source (skip(t)) — performance test requiring large machine");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 30. TestNoRaceJetStreamSuperClusterRIPStress
    // [skip(t) in Go — not run by default]
    // Long-running stress test (8 min): 3x3 super-cluster, 150 streams + mux +
    // mirror streams, 64 clients publishing concurrently.
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task JetStreamSuperClusterRIPStress_ShouldSucceed()
    {
        Skip.If(true, "Explicitly skipped in Go source (skip(t)) — long-running stress test");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 31. TestNoRaceJetStreamSlowFilteredInitialPendingAndFirstMsg
    // Creates a stream with 500k messages across 5 subjects. Tests that creating
    // consumers with specific filter subjects completes in < 150ms each.
    // Also verifies NumPending accuracy after message deletion and server restart.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamSlowFilteredInitialPendingAndFirstMsg_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamSlowFilteredInitialPendingAndFirstMsg:
        // Consumer creation < 150ms with 500k messages, NumPending accuracy
    }

    // ---------------------------------------------------------------------------
    // 32. TestNoRaceJetStreamFileStoreBufferReuse
    // [skip(t) in Go — not run by default]
    // Memory allocation test for FileStore buffer reuse with 200k messages.
    // ---------------------------------------------------------------------------
    [SkippableFact]
    public async Task JetStreamFileStoreBufferReuse_ShouldSucceed()
    {
        Skip.If(true, "Explicitly skipped in Go source (skip(t)) — performance test requiring large machine");
        await Task.CompletedTask;
    }

    // ---------------------------------------------------------------------------
    // 33. TestNoRaceJetStreamSlowRestartWithManyExpiredMsgs
    // Creates a stream with MaxAge=100ms, publishes 50k messages.
    // Waits for expiry, shuts down server, restarts it.
    // Verifies restart completes in < 5 seconds with 0 messages remaining.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamSlowRestartWithManyExpiredMsgs_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamSlowRestartWithManyExpiredMsgs:
        // Restart with 50k expired messages completes in < 5s with 0 msgs remaining
    }

    // ---------------------------------------------------------------------------
    // 34. TestNoRaceJetStreamStalledMirrorsAfterExpire
    // Creates source stream (MaxAge=250ms), publishes 100 msgs.
    // Creates mirror. Waits for mirror to sync. Publishes 100 more with delay.
    // Verifies mirror has all 200 msgs despite source expiration (not stalled).
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamStalledMirrorsAfterExpire_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamStalledMirrorsAfterExpire:
        // Mirror does not stall after source expiry, eventually has 200 msgs
    }

    // ---------------------------------------------------------------------------
    // 35. TestNoRaceJetStreamSuperClusterAccountConnz
    // 3x3 super-cluster. Verifies account connections info (connz) is reported
    // correctly across gateway connections for multiple accounts.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream super-cluster")]
    public void JetStreamSuperClusterAccountConnz_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamSuperClusterAccountConnz:
        // Account connz reported correctly across gateway connections
    }

    // ---------------------------------------------------------------------------
    // 36. TestNoRaceCompressedConnz
    // Starts a server with HTTP monitoring. Sends a gzip-accept connz request.
    // Verifies the response is valid gzip JSON with correct connection counts.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running NATS server")]
    public void CompressedConnz_ShouldSucceed()
    {
        // Port of Go TestNoRaceCompressedConnz:
        // Gzip-compressed HTTP monitoring connz endpoint returns valid JSON
    }

    // ---------------------------------------------------------------------------
    // 37. TestNoRaceJetStreamClusterExtendedStreamPurge
    // 3-server cluster. Creates stream with 100k messages across 1000 subjects.
    // Purges by subject, verifies purge is near-instant (< 5s per purge).
    // Tests both direct and per-subject purge with replica confirmation.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterExtendedStreamPurge_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterExtendedStreamPurge:
        // Per-subject purge < 5s with 100k messages across 1000 subjects
    }

    // ---------------------------------------------------------------------------
    // 38. TestNoRaceJetStreamFileStoreCompaction
    // Creates file store stream, sends 200 messages with 50% TTL = 1s,
    // waits for expiry, publishes another 100.
    // Verifies file store compacts correctly (block count decreases).
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamFileStoreCompaction_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamFileStoreCompaction:
        // File store compaction after message expiry reduces block count
    }

    // ---------------------------------------------------------------------------
    // 39. TestNoRaceJetStreamEncryptionEnabledOnRestartWithExpire
    // Creates an encrypted JetStream server, publishes messages with short TTL.
    // Restarts server. Verifies messages expired correctly and no data corruption.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamEncryptionEnabledOnRestartWithExpire_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamEncryptionEnabledOnRestartWithExpire:
        // Encrypted JetStream restart with expired messages, no data corruption
    }

    // ---------------------------------------------------------------------------
    // 40. TestNoRaceJetStreamOrderedConsumerMissingMsg
    // Creates ordered consumer on a stream. Publishes messages in two goroutines.
    // Deletes some messages. Verifies ordered consumer receives all non-deleted
    // messages in order without stalling.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamOrderedConsumerMissingMsg_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamOrderedConsumerMissingMsg:
        // Ordered consumer receives all non-deleted messages in sequence, no stalls
    }

    // ---------------------------------------------------------------------------
    // 41. TestNoRaceJetStreamClusterInterestPolicyAckNone
    // 3-server cluster. Creates interest-policy stream (AckNone).
    // Publishes 100k messages. Creates multiple consumers.
    // Verifies messages are removed once all consumers have received them.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterInterestPolicyAckNone_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterInterestPolicyAckNone:
        // Interest-policy AckNone stream, messages removed after all consumers receive
    }

    // ---------------------------------------------------------------------------
    // 42. TestNoRaceJetStreamLastSubjSeqAndFilestoreCompact
    // Creates file store stream, publishes messages to multiple subjects.
    // Verifies that LastSubjectSeq is tracked correctly through compaction.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamLastSubjSeqAndFilestoreCompact_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamLastSubjSeqAndFilestoreCompact:
        // LastSubjectSeq tracked correctly through file store compaction
    }

    // ---------------------------------------------------------------------------
    // 43. TestNoRaceJetStreamClusterMemoryStreamConsumerRaftGrowth
    // 3-server cluster. Creates memory stream with durable consumer.
    // Publishes 2 million messages and verifies the Raft WAL does not grow
    // unboundedly (checks WAL file sizes).
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterMemoryStreamConsumerRaftGrowth_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterMemoryStreamConsumerRaftGrowth:
        // Raft WAL does not grow unboundedly with 2M messages
    }

    // ---------------------------------------------------------------------------
    // 44. TestNoRaceJetStreamClusterCorruptWAL
    // 3-server cluster. Publishes messages. Corrupts the Raft WAL on all non-leader
    // replicas. Restarts servers. Verifies the cluster recovers and all messages
    // are intact.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterCorruptWAL_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterCorruptWAL:
        // Cluster recovers from Raft WAL corruption, messages intact after restart
    }

    // ---------------------------------------------------------------------------
    // 45. TestNoRaceJetStreamClusterInterestRetentionDeadlock
    // 3-server cluster. Creates interest-retention stream with push consumer.
    // Publishes messages while simultaneously deleting and recreating the consumer.
    // Verifies no deadlock occurs.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterInterestRetentionDeadlock_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterInterestRetentionDeadlock:
        // Concurrent publish + consumer delete/recreate does not deadlock
    }

    // ---------------------------------------------------------------------------
    // 46. TestNoRaceJetStreamClusterMaxConsumersAndDirect
    // 3-server cluster. Stream with MaxConsumers limit. Verifies that direct-get
    // operations do not count against MaxConsumers.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterMaxConsumersAndDirect_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterMaxConsumersAndDirect:
        // Direct-get operations do not count against MaxConsumers limit
    }

    // ---------------------------------------------------------------------------
    // 47. TestNoRaceJetStreamClusterStreamReset
    // 3-server cluster. Creates stream and sends messages. Kills a replica.
    // While server is down, purges the stream. Restarts the server.
    // Verifies stream resets correctly (no phantom messages).
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterStreamReset_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterStreamReset:
        // Stream resets correctly after replica restart following purge
    }

    // ---------------------------------------------------------------------------
    // 48. TestNoRaceJetStreamKeyValueCompaction
    // Creates a KV bucket, puts 10k entries to 100 keys (multiple revisions).
    // Verifies that after compaction the bucket has only the latest revision
    // per key (100 msgs total).
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamKeyValueCompaction_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamKeyValueCompaction:
        // KV compaction retains only latest revision per key (100 keys, 10k entries)
    }

    // ---------------------------------------------------------------------------
    // 49. TestNoRaceJetStreamClusterStreamSeqMismatchIssue
    // 3-server cluster. Tests that stream sequence number mismatch between
    // leader and replicas does not cause incorrect state after recovery.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterStreamSeqMismatchIssue_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterStreamSeqMismatchIssue:
        // Stream sequence mismatch between leader and replicas recovers correctly
    }

    // ---------------------------------------------------------------------------
    // 50. TestNoRaceJetStreamClusterStreamDropCLFS
    // 3-server cluster. Verifies that when a replica drops CLFS (checksum-less
    // full-state) messages, recovery still yields correct stream state.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream cluster server")]
    public void JetStreamClusterStreamDropCLFS_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamClusterStreamDropCLFS:
        // Replica CLFS drop recovery yields correct stream state
    }

    // ---------------------------------------------------------------------------
    // 51. TestNoRaceJetStreamMemstoreWithLargeInteriorDeletes
    // Creates a memory store stream, publishes 1 million messages, then deletes
    // every other message. Verifies NumPending and Num counts remain accurate
    // through a large number of interior deletes.
    // ---------------------------------------------------------------------------
    [Fact(Skip = "deferred: requires running JetStream server")]
    public void JetStreamMemstoreWithLargeInteriorDeletes_ShouldSucceed()
    {
        // Port of Go TestNoRaceJetStreamMemstoreWithLargeInteriorDeletes:
        // Memory store NumPending/Num accurate with 500k interior deletes
    }
}