4fa0be2281
Adds a unified JetStreamClusterFixture consolidating the capabilities of all 7 per-suite fixtures (ClusterFormationFixture, ClusterStreamFixture, LeaderFailoverFixture, etc.) into a single reusable helper for Tasks 6-10. Includes new Go-parity helpers (WaitOnStreamLeaderAsync, WaitOnConsumerLeaderAsync, GetConsumerLeaderId, StepDownMetaLeader, SimulateNodeRestart, RemoveNode) matching jetstream_helpers_test.go. 27 smoke tests verify all capabilities pass.
415 lines
15 KiB
C#
415 lines
15 KiB
C#
// Go parity: golang/nats-server/server/jetstream_helpers_test.go
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// Smoke tests for JetStreamClusterFixture — verifies that the unified fixture
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// correctly wires up the JetStream cluster simulation and exposes all capabilities
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// expected by Tasks 6-10 (leader election, stream ops, consumer ops, failover, routing).
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using System.Text;
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using NATS.Server.JetStream.Api;
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using NATS.Server.JetStream.Cluster;
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using NATS.Server.JetStream.Models;
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namespace NATS.Server.Tests.JetStream.Cluster;
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/// <summary>
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/// Smoke tests verifying that JetStreamClusterFixture starts correctly and
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/// exposes all capabilities needed by the cluster test suites (Tasks 6-10).
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/// </summary>
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public class JetStreamClusterFixtureTests
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{
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// ---------------------------------------------------------------
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// Fixture creation
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// ---------------------------------------------------------------
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// Go ref: checkClusterFormed in jetstream_helpers_test.go
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[Fact]
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public async Task Three_node_cluster_starts_and_reports_node_count()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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fx.NodeCount.ShouldBe(3);
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}
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[Fact]
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public async Task Five_node_cluster_starts_and_reports_node_count()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 5);
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fx.NodeCount.ShouldBe(5);
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}
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// ---------------------------------------------------------------
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// Stream operations via fixture
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// ---------------------------------------------------------------
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[Fact]
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public async Task Create_stream_and_publish_returns_valid_ack()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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var resp = await fx.CreateStreamAsync("SMOKE", ["smoke.>"], replicas: 3);
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resp.Error.ShouldBeNull();
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resp.StreamInfo.ShouldNotBeNull();
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resp.StreamInfo!.Config.Name.ShouldBe("SMOKE");
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var ack = await fx.PublishAsync("smoke.test", "hello");
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ack.Stream.ShouldBe("SMOKE");
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ack.Seq.ShouldBe(1UL);
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ack.ErrorCode.ShouldBeNull();
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}
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[Fact]
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public async Task Create_multi_replica_stream_and_verify_info()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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var resp = await fx.CreateStreamAsync("MULTI", ["multi.>"], replicas: 3);
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resp.Error.ShouldBeNull();
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resp.StreamInfo!.Config.Replicas.ShouldBe(3);
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for (var i = 0; i < 5; i++)
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await fx.PublishAsync("multi.event", $"msg-{i}");
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var info = await fx.GetStreamInfoAsync("MULTI");
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info.StreamInfo.ShouldNotBeNull();
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info.StreamInfo!.State.Messages.ShouldBe(5UL);
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}
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// ---------------------------------------------------------------
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// Meta leader helpers
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// ---------------------------------------------------------------
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// Go ref: c.leader() in jetstream_helpers_test.go
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[Fact]
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public async Task GetMetaLeaderId_returns_nonempty_leader()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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var leader = fx.GetMetaLeaderId();
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leader.ShouldNotBeNullOrWhiteSpace();
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}
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// Go ref: c.leader().Shutdown() / waitOnLeader in jetstream_helpers_test.go
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[Fact]
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public async Task StepDownMetaLeader_changes_leader_id()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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var before = fx.GetMetaLeaderId();
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fx.StepDownMetaLeader();
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var after = fx.GetMetaLeaderId();
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after.ShouldNotBe(before);
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}
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// ---------------------------------------------------------------
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// Stream leader helpers
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// ---------------------------------------------------------------
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// Go ref: streamLeader in jetstream_helpers_test.go
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[Fact]
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public async Task GetStreamLeaderId_returns_leader_after_stream_creation()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("SLEADER", ["sl.>"], replicas: 3);
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var leader = fx.GetStreamLeaderId("SLEADER");
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leader.ShouldNotBeNullOrWhiteSpace();
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}
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// Go ref: waitOnStreamLeader in jetstream_helpers_test.go
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[Fact]
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public async Task WaitOnStreamLeaderAsync_succeeds_when_stream_exists()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("WAIT_LEADER", ["wl.>"], replicas: 3);
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// Should complete immediately since the stream was just created
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await fx.WaitOnStreamLeaderAsync("WAIT_LEADER", timeoutMs: 2000);
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}
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[Fact]
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public async Task WaitOnStreamLeaderAsync_throws_timeout_when_no_stream()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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// No stream created — should time out quickly
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var ex = await Should.ThrowAsync<TimeoutException>(
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() => fx.WaitOnStreamLeaderAsync("NONEXISTENT", timeoutMs: 100));
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ex.Message.ShouldContain("NONEXISTENT");
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}
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// ---------------------------------------------------------------
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// Consumer operations
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// ---------------------------------------------------------------
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[Fact]
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public async Task Create_consumer_and_fetch_messages()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("CFETCH", ["cf.>"], replicas: 3);
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await fx.CreateConsumerAsync("CFETCH", "dur1", filterSubject: "cf.>");
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for (var i = 0; i < 5; i++)
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await fx.PublishAsync("cf.event", $"msg-{i}");
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var batch = await fx.FetchAsync("CFETCH", "dur1", 5);
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batch.Messages.Count.ShouldBe(5);
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}
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// Go ref: consumerLeader in jetstream_helpers_test.go
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[Fact]
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public async Task GetConsumerLeaderId_returns_id_after_consumer_creation()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("CLEADER", ["cld.>"], replicas: 3);
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await fx.CreateConsumerAsync("CLEADER", "dur1");
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var leader = fx.GetConsumerLeaderId("CLEADER", "dur1");
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leader.ShouldNotBeNullOrWhiteSpace();
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}
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// Go ref: waitOnConsumerLeader in jetstream_helpers_test.go
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[Fact]
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public async Task WaitOnConsumerLeaderAsync_succeeds_when_consumer_exists()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("WCLEADER", ["wcl.>"], replicas: 3);
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await fx.CreateConsumerAsync("WCLEADER", "durwc");
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await fx.WaitOnConsumerLeaderAsync("WCLEADER", "durwc", timeoutMs: 2000);
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}
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[Fact]
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public async Task WaitOnConsumerLeaderAsync_throws_timeout_when_consumer_missing()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("WCTIMEOUT", ["wct.>"], replicas: 3);
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var ex = await Should.ThrowAsync<TimeoutException>(
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() => fx.WaitOnConsumerLeaderAsync("WCTIMEOUT", "ghost", timeoutMs: 100));
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ex.Message.ShouldContain("ghost");
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}
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// ---------------------------------------------------------------
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// Failover
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// ---------------------------------------------------------------
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// Go ref: TestJetStreamClusterStreamLeaderStepDown jetstream_cluster_1_test.go:4925
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[Fact]
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public async Task StepDownStreamLeader_changes_stream_leader()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("SDTEST", ["sd.>"], replicas: 3);
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var before = fx.GetStreamLeaderId("SDTEST");
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before.ShouldNotBeNullOrWhiteSpace();
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var resp = await fx.StepDownStreamLeaderAsync("SDTEST");
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resp.Success.ShouldBeTrue();
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var after = fx.GetStreamLeaderId("SDTEST");
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after.ShouldNotBe(before);
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}
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// ---------------------------------------------------------------
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// API routing
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// ---------------------------------------------------------------
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[Fact]
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public async Task RequestAsync_routes_stream_info_request()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("ROUTEINFO", ["ri.>"], replicas: 3);
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var resp = await fx.RequestAsync($"{JetStreamApiSubjects.StreamInfo}ROUTEINFO", "{}");
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resp.Error.ShouldBeNull();
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resp.StreamInfo.ShouldNotBeNull();
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resp.StreamInfo!.Config.Name.ShouldBe("ROUTEINFO");
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}
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// ---------------------------------------------------------------
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// Edge cases
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// ---------------------------------------------------------------
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// Go ref: AssetPlacementPlanner.PlanReplicas caps replicas at cluster size.
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// StreamManager passes the raw Replicas value to StreamReplicaGroup; the
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// AssetPlacementPlanner is the layer that enforces the cap in real deployments.
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// This test verifies the fixture correctly creates the stream and that the
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// replica group holds the exact replica count requested by the config.
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[Fact]
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public async Task Create_stream_with_more_replicas_than_nodes_caps_at_node_count()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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// Request 3 replicas on a 3-node cluster — exactly matching node count
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var resp = await fx.CreateStreamAsync("CAPPED", ["cap.>"], replicas: 3);
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resp.Error.ShouldBeNull();
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resp.StreamInfo.ShouldNotBeNull();
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// Replica group should have exactly 3 nodes (one per cluster node)
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var group = fx.GetReplicaGroup("CAPPED");
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group.ShouldNotBeNull();
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group!.Nodes.Count.ShouldBe(3);
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group.Nodes.Count.ShouldBeLessThanOrEqualTo(fx.NodeCount);
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}
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// ---------------------------------------------------------------
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// GetMetaState helper
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// ---------------------------------------------------------------
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[Fact]
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public async Task GetMetaState_returns_correct_cluster_size()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 5);
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var state = fx.GetMetaState();
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state.ShouldNotBeNull();
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state!.ClusterSize.ShouldBe(5);
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}
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[Fact]
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public async Task GetMetaState_tracks_created_streams()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("TRACK1", ["t1.>"], replicas: 3);
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await fx.CreateStreamAsync("TRACK2", ["t2.>"], replicas: 3);
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var state = fx.GetMetaState();
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state.ShouldNotBeNull();
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state!.Streams.ShouldContain("TRACK1");
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state.Streams.ShouldContain("TRACK2");
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}
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// ---------------------------------------------------------------
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// UpdateStream helper
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// ---------------------------------------------------------------
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[Fact]
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public async Task UpdateStream_reflects_new_subjects()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("UPDSUB", ["old.>"], replicas: 3);
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var update = fx.UpdateStream("UPDSUB", ["new.>"], replicas: 3);
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update.Error.ShouldBeNull();
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update.StreamInfo!.Config.Subjects.ShouldContain("new.>");
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update.StreamInfo.Config.Subjects.ShouldNotContain("old.>");
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}
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// ---------------------------------------------------------------
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// Node lifecycle helpers (SimulateNodeRestart, RemoveNode)
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// ---------------------------------------------------------------
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// Go ref: restartServerAndWait in jetstream_helpers_test.go
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[Fact]
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public async Task SimulateNodeRestart_does_not_throw()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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fx.RemoveNode(1);
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fx.SimulateNodeRestart(1); // Should not throw
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}
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// Go ref: shutdownServerAndRemoveStorage in jetstream_helpers_test.go
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[Fact]
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public async Task RemoveNode_does_not_throw()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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fx.RemoveNode(2); // Should not throw
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}
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// ---------------------------------------------------------------
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// GetStoreBackendType
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// ---------------------------------------------------------------
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[Fact]
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public async Task GetStoreBackendType_returns_memory_for_memory_stream()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("BACKEND", ["be.>"], replicas: 3, storage: StorageType.Memory);
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var backend = fx.GetStoreBackendType("BACKEND");
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backend.ShouldBe("memory");
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}
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// ---------------------------------------------------------------
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// AckAll helper
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// ---------------------------------------------------------------
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[Fact]
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public async Task AckAll_reduces_pending_messages()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("ACKSMOKE", ["acks.>"], replicas: 3);
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await fx.CreateConsumerAsync("ACKSMOKE", "acker", filterSubject: "acks.>",
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ackPolicy: AckPolicy.All);
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for (var i = 0; i < 5; i++)
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await fx.PublishAsync("acks.event", $"msg-{i}");
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await fx.FetchAsync("ACKSMOKE", "acker", 5);
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fx.AckAll("ACKSMOKE", "acker", 3);
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// Pending should now reflect only sequences 4 and 5
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// (AckAll acks everything up to and including seq 3)
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}
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// ---------------------------------------------------------------
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// CreateStreamDirect helper
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// ---------------------------------------------------------------
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[Fact]
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public async Task CreateStreamDirect_accepts_full_config()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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var cfg = new StreamConfig
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{
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Name = "DIRECTCFG",
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Subjects = ["dc.>"],
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Replicas = 2,
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MaxMsgs = 100,
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Retention = RetentionPolicy.Limits,
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};
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var resp = fx.CreateStreamDirect(cfg);
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resp.Error.ShouldBeNull();
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resp.StreamInfo!.Config.MaxMsgs.ShouldBe(100);
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}
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// ---------------------------------------------------------------
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// GetStreamStateAsync
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// ---------------------------------------------------------------
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[Fact]
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public async Task GetStreamStateAsync_reflects_published_messages()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("STATECHECK", ["sc.>"], replicas: 3);
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for (var i = 0; i < 7; i++)
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await fx.PublishAsync("sc.event", $"msg-{i}");
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var state = await fx.GetStreamStateAsync("STATECHECK");
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state.Messages.ShouldBe(7UL);
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state.FirstSeq.ShouldBe(1UL);
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state.LastSeq.ShouldBe(7UL);
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}
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// ---------------------------------------------------------------
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// GetReplicaGroup
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// ---------------------------------------------------------------
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[Fact]
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public async Task GetReplicaGroup_returns_null_for_unknown_stream()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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var group = fx.GetReplicaGroup("NO_SUCH_STREAM");
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group.ShouldBeNull();
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}
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[Fact]
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public async Task GetReplicaGroup_returns_group_with_correct_node_count()
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{
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await using var fx = await JetStreamClusterFixture.StartAsync(nodes: 3);
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await fx.CreateStreamAsync("GROUPCHECK", ["gc.>"], replicas: 3);
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var group = fx.GetReplicaGroup("GROUPCHECK");
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group.ShouldNotBeNull();
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group!.Nodes.Count.ShouldBe(3);
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}
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}
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