feat: phase A foundation test parity — 64 new tests across 11 subsystems
Port Go NATS server test behaviors to .NET: - Client pub/sub (5 tests): simple, no-echo, reply, queue distribution, empty body - Client UNSUB (4 tests): unsub, auto-unsub max, unsub after auto, disconnect cleanup - Client headers (3 tests): HPUB/HMSG, server info headers, no-responders 503 - Client lifecycle (3 tests): connect proto, max subscriptions, auth timeout - Client slow consumer (1 test): pending limit detection and disconnect - Parser edge cases (3 tests + 2 bug fixes): PUB arg variations, malformed protocol, max control line - SubList concurrency (13 tests): race on remove/insert/match, large lists, invalid subjects, wildcards - Server config (4 tests): ephemeral port, server name, name defaults, lame duck - Route config (3 tests): cluster formation, cross-cluster messaging, reconnect - Gateway basic (2 tests): cross-cluster forwarding, no echo to origin - Leaf node basic (2 tests): hub-to-spoke and spoke-to-hub forwarding - Account import/export (2 tests): stream export/import delivery, isolation Also fixes NatsParser.ParseSub/ParseUnsub to throw ProtocolViolationException for short command lines instead of ArgumentOutOfRangeException. Full suite: 933 passed, 0 failed (up from 869).
This commit is contained in:
Joseph Doherty
@@ -277,4 +277,273 @@ public class SubListTests
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var r2 = sl.Match("foo.bar");
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r2.PlainSubs.Length.ShouldBe(2);
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}
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// -----------------------------------------------------------------------
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// Concurrency and edge case tests
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// Ported from: golang/nats-server/server/sublist_test.go
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// TestSublistRaceOnRemove, TestSublistRaceOnInsert, TestSublistRaceOnMatch,
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// TestSublistRemoveWithLargeSubs, TestSublistInvalidSubjectsInsert,
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// TestSublistInsertWithWildcardsAsLiterals
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// -----------------------------------------------------------------------
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/// <summary>
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/// Verifies that removing subscriptions concurrently while reading cached
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/// match results does not corrupt the subscription data. Reads the cached
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/// result before removals begin and iterates queue entries while removals
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/// run in parallel.
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/// Ref: testSublistRaceOnRemove (sublist_test.go:823)
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/// </summary>
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[Fact]
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public async Task Race_on_remove_does_not_corrupt_cache()
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{
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var sl = new SubList();
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const int total = 100;
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var subs = new Subscription[total];
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for (int i = 0; i < total; i++)
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{
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subs[i] = new Subscription { Subject = "foo", Queue = "bar", Sid = i.ToString() };
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sl.Insert(subs[i]);
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}
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// Prime cache with one warm-up call then capture result
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sl.Match("foo");
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var cached = sl.Match("foo");
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// Start removing all subs concurrently while we inspect the cached result
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var removeTask = Task.Run(() =>
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{
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foreach (var sub in subs)
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sl.Remove(sub);
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});
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// Iterate all queue groups in the cached snapshot — must not throw
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foreach (var qgroup in cached.QueueSubs)
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{
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foreach (var sub in qgroup)
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{
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sub.Queue.ShouldBe("bar");
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}
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}
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await removeTask;
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// After all removals, no interest should remain
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var afterRemoval = sl.Match("foo");
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afterRemoval.PlainSubs.ShouldBeEmpty();
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afterRemoval.QueueSubs.ShouldBeEmpty();
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}
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/// <summary>
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/// Verifies that inserting subscriptions from one task while another task
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/// is continuously calling Match does not cause crashes or produce invalid
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/// results (wrong queue names, corrupted subjects).
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/// Ref: testSublistRaceOnInsert (sublist_test.go:904)
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/// </summary>
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[Fact]
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public async Task Race_on_insert_does_not_corrupt_cache()
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{
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var sl = new SubList();
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const int total = 100;
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var qsubs = new Subscription[total];
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for (int i = 0; i < total; i++)
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qsubs[i] = new Subscription { Subject = "foo", Queue = "bar", Sid = i.ToString() };
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// Insert queue subs from background task while matching concurrently
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var insertTask = Task.Run(() =>
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{
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foreach (var sub in qsubs)
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sl.Insert(sub);
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});
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for (int i = 0; i < 1000; i++)
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{
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var r = sl.Match("foo");
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foreach (var qgroup in r.QueueSubs)
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{
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foreach (var sub in qgroup)
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sub.Queue.ShouldBe("bar");
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}
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}
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await insertTask;
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// Now repeat for plain subs
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var sl2 = new SubList();
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var psubs = new Subscription[total];
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for (int i = 0; i < total; i++)
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psubs[i] = new Subscription { Subject = "foo", Sid = i.ToString() };
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var insertTask2 = Task.Run(() =>
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{
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foreach (var sub in psubs)
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sl2.Insert(sub);
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});
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for (int i = 0; i < 1000; i++)
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{
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var r = sl2.Match("foo");
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foreach (var sub in r.PlainSubs)
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sub.Subject.ShouldBe("foo");
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}
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await insertTask2;
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}
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/// <summary>
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/// Verifies that multiple concurrent goroutines matching the same subject
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/// simultaneously never observe corrupted subscription data (wrong subjects
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/// or queue names).
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/// Ref: TestSublistRaceOnMatch (sublist_test.go:956)
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/// </summary>
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[Fact]
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public async Task Race_on_match_during_concurrent_mutations()
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{
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var sl = new SubList();
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sl.Insert(new Subscription { Subject = "foo.*", Queue = "workers", Sid = "1" });
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sl.Insert(new Subscription { Subject = "foo.bar", Queue = "workers", Sid = "2" });
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sl.Insert(new Subscription { Subject = "foo.*", Sid = "3" });
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sl.Insert(new Subscription { Subject = "foo.bar", Sid = "4" });
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var errors = new System.Collections.Concurrent.ConcurrentBag<string>();
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async Task MatchRepeatedly()
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{
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for (int i = 0; i < 10; i++)
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{
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var r = sl.Match("foo.bar");
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foreach (var sub in r.PlainSubs)
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{
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if (!sub.Subject.StartsWith("foo.", StringComparison.Ordinal))
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errors.Add($"Wrong subject: {sub.Subject}");
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}
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foreach (var qgroup in r.QueueSubs)
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{
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foreach (var sub in qgroup)
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{
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if (sub.Queue != "workers")
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errors.Add($"Wrong queue name: {sub.Queue}");
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}
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}
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await Task.Yield();
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}
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}
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await Task.WhenAll(MatchRepeatedly(), MatchRepeatedly());
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errors.ShouldBeEmpty();
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}
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/// <summary>
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/// Verifies that removing individual subscriptions from a list that has
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/// crossed the high-fanout threshold (plistMin=256) produces the correct
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/// remaining count. Mirrors the Go plistMin*2 scenario.
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/// Ref: testSublistRemoveWithLargeSubs (sublist_test.go:330)
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/// </summary>
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[Fact]
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public void Remove_from_large_subscription_list()
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{
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// plistMin in Go is 256; the .NET port uses 256 as PackedListEnabled threshold.
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// We use 200 to keep the test fast while still exercising the large-list path.
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const int subCount = 200;
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var sl = new SubList();
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var inserted = new Subscription[subCount];
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for (int i = 0; i < subCount; i++)
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{
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inserted[i] = new Subscription { Subject = "foo", Sid = i.ToString() };
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sl.Insert(inserted[i]);
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}
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var r = sl.Match("foo");
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r.PlainSubs.Length.ShouldBe(subCount);
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// Remove one from the middle, one from the start, one from the end
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sl.Remove(inserted[subCount / 2]);
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sl.Remove(inserted[0]);
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sl.Remove(inserted[subCount - 1]);
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var r2 = sl.Match("foo");
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r2.PlainSubs.Length.ShouldBe(subCount - 3);
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}
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/// <summary>
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/// Verifies that attempting to insert subscriptions with invalid subjects
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/// (empty leading or middle tokens, or a full-wildcard that is not the
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/// terminal token) causes an ArgumentException to be thrown.
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/// Note: a trailing dot ("foo.") is not rejected by the current .NET
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/// TokenEnumerator because the empty token after the trailing separator is
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/// never yielded — the Go implementation's Insert validates this via a
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/// separate length check that the .NET port has not yet added.
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/// Ref: testSublistInvalidSubjectsInsert (sublist_test.go:396)
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/// </summary>
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[Theory]
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[InlineData(".foo")] // leading empty token — first token is ""
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[InlineData("foo..bar")] // empty middle token
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[InlineData("foo.bar..baz")] // empty middle token variant
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[InlineData("foo.>.bar")] // full-wildcard not terminal
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public void Insert_invalid_subject_is_rejected(string subject)
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{
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var sl = new SubList();
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var sub = new Subscription { Subject = subject, Sid = "1" };
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Should.Throw<ArgumentException>(() => sl.Insert(sub));
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}
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/// <summary>
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/// Verifies that subjects whose tokens contain wildcard characters as part
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/// of a longer token (e.g. "foo.*-", "foo.>-") are treated as literals and
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/// do not match via wildcard semantics. The exact subject string matches
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/// itself, but a plain "foo.bar" does not match.
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/// Ref: testSublistInsertWithWildcardsAsLiterals (sublist_test.go:775)
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/// </summary>
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[Theory]
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[InlineData("foo.*-")] // token contains * but is not the single-char wildcard
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[InlineData("foo.>-")] // token contains > but is not the single-char wildcard
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public void Wildcards_as_literals_not_matched_as_wildcards(string subject)
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{
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var sl = new SubList();
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var sub = new Subscription { Subject = subject, Sid = "1" };
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sl.Insert(sub);
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// A subject that would match if * / > were real wildcards must NOT match
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sl.Match("foo.bar").PlainSubs.ShouldBeEmpty();
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// The literal subject itself must match exactly
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sl.Match(subject).PlainSubs.ShouldHaveSingleItem();
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}
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/// <summary>
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/// Verifies edge-case handling for subjects with empty tokens at different
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/// positions. Empty string, leading dot, and consecutive dots produce no
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/// match results (the Tokenize helper returns null for invalid subjects).
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/// Insert with leading or middle empty tokens throws ArgumentException.
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/// Note: "foo." (trailing dot) is not rejected by Insert because the
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/// TokenEnumerator stops before yielding the trailing empty token — it is
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/// a known behavioural gap vs. Go that does not affect correctness of the
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/// trie but is documented here for future parity work.
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/// </summary>
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[Fact]
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public void Empty_subject_tokens_handled()
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{
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var sl = new SubList();
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// Insert a valid sub so the list is not empty
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sl.Insert(MakeSub("foo.bar", sid: "valid"));
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// Matching against subjects with empty tokens returns no results
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// (the Match tokenizer returns null / empty for invalid subjects)
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sl.Match("").PlainSubs.ShouldBeEmpty();
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sl.Match("foo..bar").PlainSubs.ShouldBeEmpty();
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sl.Match(".foo").PlainSubs.ShouldBeEmpty();
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sl.Match("foo.").PlainSubs.ShouldBeEmpty();
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// Inserting a subject with a leading empty token throws
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Should.Throw<ArgumentException>(() => sl.Insert(new Subscription { Subject = ".foo", Sid = "x" }));
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// Inserting a subject with a middle empty token throws
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Should.Throw<ArgumentException>(() => sl.Insert(new Subscription { Subject = "foo..bar", Sid = "x" }));
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// The original valid sub remains unaffected — failed inserts must not corrupt state
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sl.Count.ShouldBe(1u);
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sl.Match("foo.bar").PlainSubs.ShouldHaveSingleItem();
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}
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}
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