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test: lock parser span-retention behavior

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This commit is contained in:
Joseph Doherty
2026-03-13 09:51:17 -04:00
parent 0be321fa53
commit 98cbdbdeb8
3 changed files with 202 additions and 0 deletions
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36
tests/NATS.Server.Core.Tests/ParserTests.cs
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@@ -61,6 +61,16 @@ public class ParserTests
Encoding.ASCII.GetString(cmds[0].Payload.ToArray()).ShouldContain("verbose");
}
[Fact]
public async Task Parse_CONNECT_preserves_json_payload_bytes()
{
const string json = "{\"verbose\":false,\"echo\":true}";
var cmds = await ParseAsync($"CONNECT {json}\r\n");
cmds.ShouldHaveSingleItem();
cmds[0].Type.ShouldBe(CommandType.Connect);
Encoding.ASCII.GetString(cmds[0].Payload.Span).ShouldBe(json);
}
[Fact]
public async Task Parse_SUB_without_queue()
{
@@ -144,6 +154,31 @@ public class ParserTests
cmds[0].Payload.ToArray().ShouldBeEmpty();
}
[Fact]
public async Task Parse_split_PUB_payload_across_reads()
{
var pipe = new Pipe();
var parser = new NatsParser(maxPayload: NatsProtocol.MaxPayloadSize);
await pipe.Writer.WriteAsync(Encoding.ASCII.GetBytes("PUB foo 5\r\nHe"));
var first = await pipe.Reader.ReadAsync();
var firstBuffer = first.Buffer;
parser.TryParse(ref firstBuffer, out _).ShouldBeFalse();
pipe.Reader.AdvanceTo(firstBuffer.Start, firstBuffer.End);
await pipe.Writer.WriteAsync(Encoding.ASCII.GetBytes("llo\r\n"));
pipe.Writer.Complete();
var second = await pipe.Reader.ReadAsync();
var secondBuffer = second.Buffer;
parser.TryParse(ref secondBuffer, out var cmd).ShouldBeTrue();
cmd.Type.ShouldBe(CommandType.Pub);
cmd.Subject.ShouldBe("foo");
Encoding.ASCII.GetString(cmd.Payload.Span).ShouldBe("Hello");
pipe.Reader.AdvanceTo(secondBuffer.Start, secondBuffer.End);
}
[Fact]
public async Task Parse_case_insensitive()
{
@@ -173,6 +208,7 @@ public class ParserTests
var cmds = await ParseAsync("INFO {\"server_id\":\"test\"}\r\n");
cmds.ShouldHaveSingleItem();
cmds[0].Type.ShouldBe(CommandType.Info);
Encoding.ASCII.GetString(cmds[0].Payload.Span).ShouldBe("{\"server_id\":\"test\"}");
}
// Mirrors Go TestParsePubArg: verifies subject, optional reply, and payload size