refactor: extract NATS.Server.JetStream.Tests project

Move 225 JetStream-related test files from NATS.Server.Tests into a
dedicated NATS.Server.JetStream.Tests project. This includes root-level
JetStream*.cs files, storage test files (FileStore, MemStore,
StreamStoreContract), and the full JetStream/ subfolder tree (Api,
Cluster, Consumers, MirrorSource, Snapshots, Storage, Streams).

Updated all namespaces, added InternalsVisibleTo, registered in the
solution file, and added the JETSTREAM_INTEGRATION_MATRIX define.
This commit is contained in:
Joseph Doherty
2026-03-12 15:58:10 -04:00
parent 36b9dfa654
commit 78b4bc2486
228 changed files with 253 additions and 227 deletions

View File

@@ -0,0 +1,283 @@
// Go reference: server/jetstream_api.go — jsStreamSnapshotT / jsStreamRestoreT
// Tests for TAR-based stream snapshot/restore with Snappy (S2) compression.
using System.Formats.Tar;
using System.Text;
using System.Text.Json;
using IronSnappy;
using NATS.Server.JetStream;
using NATS.Server.JetStream.Models;
using NATS.Server.JetStream.Snapshots;
using NATS.Server.JetStream.Storage;
using Shouldly;
namespace NATS.Server.JetStream.Tests.JetStream.Snapshots;
public sealed class StreamSnapshotTests
{
// ──────────────────────────────────────────────────────────────────────────
// Helpers
// ──────────────────────────────────────────────────────────────────────────
private static StreamHandle MakeHandle(string name = "TEST")
{
var config = new StreamConfig { Name = name };
IStreamStore store = new MemStore(config);
return new StreamHandle(config, store);
}
private static async Task StoreAsync(StreamHandle h, string subject, string payload)
=> await h.Store.AppendAsync(subject, Encoding.UTF8.GetBytes(payload), default);
private static async Task<(byte[] tarBytes, List<string> entryNames)> DecompressAndListEntries(
byte[] snappyBytes)
{
var tarBytes = Snappy.Decode(snappyBytes);
using var ms = new MemoryStream(tarBytes);
using var reader = new TarReader(ms, leaveOpen: false);
var names = new List<string>();
TarEntry? entry;
while ((entry = await reader.GetNextEntryAsync()) is not null)
names.Add(entry.Name);
return (tarBytes, names);
}
// ──────────────────────────────────────────────────────────────────────────
// Test 1 — stream.json is present in the TAR
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/jetstream_api.go:jsStreamSnapshotT — snapshot includes config JSON.
[Fact]
public async Task CreateTarSnapshot_includes_stream_config()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle("MYSTREAM");
var compressed = await svc.CreateTarSnapshotAsync(handle, default);
var (_, names) = await DecompressAndListEntries(compressed);
names.ShouldContain("stream.json");
}
// ──────────────────────────────────────────────────────────────────────────
// Test 2 — all messages appear in the TAR
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/jetstream_api.go:jsStreamSnapshotT — snapshot contains all stored messages.
[Fact]
public async Task CreateTarSnapshot_includes_all_messages()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle();
for (var i = 1; i <= 5; i++)
await StoreAsync(handle, $"foo.{i}", $"payload-{i}");
var compressed = await svc.CreateTarSnapshotAsync(handle, default);
var (_, names) = await DecompressAndListEntries(compressed);
var messageEntries = names.Where(n => n.StartsWith("messages/")).ToList();
messageEntries.Count.ShouldBe(5);
}
// ──────────────────────────────────────────────────────────────────────────
// Test 3 — the snapshot bytes are Snappy-compressed
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/filestore.go — S2 / Snappy compression is used for snapshots.
[Fact]
public async Task CreateTarSnapshot_compresses_with_snappy()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle();
await StoreAsync(handle, "test.subject", "test payload data");
var compressed = await svc.CreateTarSnapshotAsync(handle, default);
// Round-trip decode must succeed — this verifies it is valid Snappy data.
var decoded = Should.NotThrow(() => Snappy.Decode(compressed));
decoded.ShouldNotBeEmpty();
}
// ──────────────────────────────────────────────────────────────────────────
// Test 4 — restore replays messages back into the store
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/jetstream_api.go:jsStreamRestoreT — restore re-populates the store.
[Fact]
public async Task RestoreTarSnapshot_replays_messages()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle();
await StoreAsync(handle, "a.1", "first");
await StoreAsync(handle, "a.2", "second");
await StoreAsync(handle, "a.3", "third");
var compressed = await svc.CreateTarSnapshotAsync(handle, default);
// Purge the store to simulate data loss.
await handle.Store.PurgeAsync(default);
var stateAfterPurge = await handle.Store.GetStateAsync(default);
stateAfterPurge.Messages.ShouldBe(0UL);
// Restore from the snapshot.
await svc.RestoreTarSnapshotAsync(handle, compressed, default);
var stateAfterRestore = await handle.Store.GetStateAsync(default);
stateAfterRestore.Messages.ShouldBe(3UL);
}
// ──────────────────────────────────────────────────────────────────────────
// Test 5 — restore returns correct stats
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/jetstream_api.go:jsStreamRestoreT — response reports bytes/messages restored.
[Fact]
public async Task RestoreTarSnapshot_returns_correct_stats()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle("STATSSTREAM");
await StoreAsync(handle, "s.1", "hello");
await StoreAsync(handle, "s.2", "world");
var compressed = await svc.CreateTarSnapshotAsync(handle, default);
await handle.Store.PurgeAsync(default);
var result = await svc.RestoreTarSnapshotAsync(handle, compressed, default);
result.StreamName.ShouldBe("STATSSTREAM");
result.MessagesRestored.ShouldBe(2);
result.BytesRestored.ShouldBeGreaterThan(0L);
}
// ──────────────────────────────────────────────────────────────────────────
// Test 6 — restore rejects a TAR that is missing stream.json
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/jetstream_api.go:jsStreamRestoreT — invalid snapshot returns an error.
[Fact]
public async Task RestoreTarSnapshot_validates_stream_json()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle();
// Build a TAR that contains no stream.json entry.
using var tarBuffer = new MemoryStream();
using (var writer = new TarWriter(tarBuffer, TarEntryFormat.Pax, leaveOpen: true))
{
var bogus = new PaxTarEntry(TarEntryType.RegularFile, "other/file.txt")
{
DataStream = new MemoryStream("not a config"u8.ToArray()),
};
await writer.WriteEntryAsync(bogus);
}
var badSnappy = Snappy.Encode(tarBuffer.ToArray());
await Should.ThrowAsync<InvalidOperationException>(
() => svc.RestoreTarSnapshotAsync(handle, badSnappy, default));
}
// ──────────────────────────────────────────────────────────────────────────
// Test 7 — snapshot with deadline completes when deadline is generous
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/filestore.go — snapshot creation must respect deadlines.
[Fact]
public async Task CreateTarSnapshotWithDeadline_completes_within_deadline()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle();
await StoreAsync(handle, "d.1", "data");
var compressed = await svc.CreateTarSnapshotWithDeadlineAsync(
handle,
TimeSpan.FromSeconds(30),
default);
compressed.ShouldNotBeEmpty();
}
// ──────────────────────────────────────────────────────────────────────────
// Test 8 — snapshot of an empty stream produces a valid archive
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/jetstream_api.go:jsStreamSnapshotT — empty stream is a valid snapshot.
[Fact]
public async Task CreateTarSnapshot_empty_stream()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle("EMPTY");
var compressed = await svc.CreateTarSnapshotAsync(handle, default);
compressed.ShouldNotBeEmpty();
var (_, names) = await DecompressAndListEntries(compressed);
names.ShouldContain("stream.json");
names.Where(n => n.StartsWith("messages/")).ShouldBeEmpty();
}
// ──────────────────────────────────────────────────────────────────────────
// Test 9 — round-trip preserves message subjects
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/jetstream_api.go — snapshot/restore is lossless for subjects.
[Fact]
public async Task Roundtrip_snapshot_preserves_message_subjects()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle("SUBJECTS");
var subjects = new[] { "alpha.1", "beta.2", "gamma.3" };
foreach (var s in subjects)
await StoreAsync(handle, s, $"payload for {s}");
var compressed = await svc.CreateTarSnapshotAsync(handle, default);
// Restore to a fresh store.
var newConfig = new StreamConfig { Name = "SUBJECTS" };
IStreamStore newStore = new MemStore(newConfig);
var newHandle = new StreamHandle(newConfig, newStore);
await svc.RestoreTarSnapshotAsync(newHandle, compressed, default);
var restored = await newStore.ListAsync(default);
var restoredSubjects = restored.Select(m => m.Subject).OrderBy(x => x).ToArray();
var expectedSubjects = subjects.OrderBy(x => x).ToArray();
restoredSubjects.ShouldBe(expectedSubjects);
}
// ──────────────────────────────────────────────────────────────────────────
// Test 10 — round-trip preserves message payloads
// ──────────────────────────────────────────────────────────────────────────
// Go ref: server/jetstream_api.go — snapshot/restore is lossless for payload bytes.
[Fact]
public async Task Roundtrip_snapshot_preserves_message_payloads()
{
var svc = new StreamSnapshotService();
var handle = MakeHandle("PAYLOADS");
var payloads = new[] { "hello world"u8.ToArray(), new byte[] { 0, 1, 2, 3, 255 } };
await handle.Store.AppendAsync("p.1", payloads[0], default);
await handle.Store.AppendAsync("p.2", payloads[1], default);
var compressed = await svc.CreateTarSnapshotAsync(handle, default);
// Restore to a fresh store.
var newConfig = new StreamConfig { Name = "PAYLOADS" };
IStreamStore newStore = new MemStore(newConfig);
var newHandle = new StreamHandle(newConfig, newStore);
await svc.RestoreTarSnapshotAsync(newHandle, compressed, default);
var restored = (await newStore.ListAsync(default)).OrderBy(m => m.Sequence).ToList();
restored.Count.ShouldBe(2);
restored[0].Payload.ToArray().ShouldBe(payloads[0]);
restored[1].Payload.ToArray().ShouldBe(payloads[1]);
}
}