57 lines
1.9 KiB
C#
57 lines
1.9 KiB
C#
using System.Buffers;
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using System.Text;
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using NATS.Server.Protocol;
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namespace NATS.Server.Core.Tests.ProtocolParity;
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public class ProtocolParserSnippetGapParityTests
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{
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[Fact]
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public void ProtoSnippet_returns_empty_quotes_when_start_is_out_of_range()
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{
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var bytes = "PING"u8.ToArray();
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var snippet = NatsParser.ProtoSnippet(bytes.Length, 2, bytes);
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snippet.ShouldBe("\"\"");
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}
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[Fact]
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public void ProtoSnippet_limits_to_requested_window_and_quotes_output()
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{
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var bytes = "ABCDEFGHIJ"u8.ToArray();
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var snippet = NatsParser.ProtoSnippet(2, 4, bytes);
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snippet.ShouldBe("\"CDEF\"");
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}
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[Fact]
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public void ProtoSnippet_matches_go_behavior_when_max_runs_past_buffer_end()
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{
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var bytes = "ABCDE"u8.ToArray();
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var snippet = NatsParser.ProtoSnippet(0, 32, bytes);
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snippet.ShouldBe("\"ABCD\"");
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}
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[Fact]
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public void Parse_exceeding_max_control_line_includes_snippet_context_in_error()
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{
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var parser = new NatsParser();
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var longSubject = new string('a', NatsProtocol.MaxControlLineSize + 1);
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var input = Encoding.ASCII.GetBytes($"PUB {longSubject} 0\r\n\r\n");
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ReadOnlySequence<byte> buffer = new(input);
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var ex = Should.Throw<ProtocolViolationException>(() => parser.TryParse(ref buffer, out _));
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ex.Message.ShouldContain("Maximum control line exceeded");
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ex.Message.ShouldContain("snip=");
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}
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[Fact]
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public void Parse_invalid_payload_trailer_preserves_existing_error_message()
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{
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var parser = new NatsParser();
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var input = Encoding.ASCII.GetBytes("PUB foo 5\r\nHelloXX");
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ReadOnlySequence<byte> buffer = new(input);
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var ex = Should.Throw<ProtocolViolationException>(() => parser.TryParse(ref buffer, out _));
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ex.Message.ShouldBe("Expected \\r\\n after payload");
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}
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}
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