684254ad86
Add GatewayCommands static class with wire-format byte sequences (GINFO, GS+, GS-, GMODE, GMSG, GPING, GPONG) and FormatSub/FormatUnsub/FormatMode/ParseCommandType helpers matching Go's gateway.go protocol constants. Add GatewayCommandType enum. 10 tests covering all wire formats and command parsing.
100 lines
3.4 KiB
C#
100 lines
3.4 KiB
C#
using System.Text;
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using NATS.Server.Gateways;
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using Shouldly;
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namespace NATS.Server.Tests.Gateways;
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// Go reference: gateway.go:90-120 — gateway protocol constants and command formatting.
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public class GatewayCommandTests
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{
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[Fact]
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public void FormatSub_produces_correct_wire_format()
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{
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// Go reference: gateway.go — RS+ propagation, sendGatewaySubsToGateway
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var bytes = GatewayCommands.FormatSub("$G", "orders.>");
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var line = Encoding.UTF8.GetString(bytes);
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line.ShouldBe("GS+ $G orders.>\r\n");
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}
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[Fact]
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public void FormatUnsub_produces_correct_wire_format()
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{
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// Go reference: gateway.go — RS- propagation, sendGatewayUnsubToGateway
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var bytes = GatewayCommands.FormatUnsub("$G", "orders.>");
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var line = Encoding.UTF8.GetString(bytes);
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line.ShouldBe("GS- $G orders.>\r\n");
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}
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[Fact]
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public void FormatMode_optimistic_produces_O()
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{
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// Go reference: gateway.go — GMODE command, "O" = Optimistic mode
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var bytes = GatewayCommands.FormatMode("$G", GatewayInterestMode.Optimistic);
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var line = Encoding.UTF8.GetString(bytes);
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line.ShouldBe("GMODE $G O\r\n");
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}
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[Fact]
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public void FormatMode_interest_only_produces_I()
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{
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// Go reference: gateway.go — GMODE command, "I" = InterestOnly mode
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var bytes = GatewayCommands.FormatMode("$G", GatewayInterestMode.InterestOnly);
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var line = Encoding.UTF8.GetString(bytes);
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line.ShouldBe("GMODE $G I\r\n");
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}
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[Fact]
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public void ParseCommandType_identifies_sub()
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{
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// Go reference: gateway.go — processGatewayMsg dispatch on GS+
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var line = Encoding.UTF8.GetBytes("GS+ ACC foo.bar\r\n");
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var result = GatewayCommands.ParseCommandType(line);
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result.ShouldBe(GatewayCommandType.Sub);
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}
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[Fact]
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public void ParseCommandType_identifies_unsub()
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{
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// Go reference: gateway.go — processGatewayMsg dispatch on GS-
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var line = Encoding.UTF8.GetBytes("GS- ACC foo.bar\r\n");
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var result = GatewayCommands.ParseCommandType(line);
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result.ShouldBe(GatewayCommandType.Unsub);
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}
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[Fact]
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public void ParseCommandType_identifies_ping()
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{
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// Go reference: gateway.go — keepalive GPING command
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var result = GatewayCommands.ParseCommandType(GatewayCommands.Ping);
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result.ShouldBe(GatewayCommandType.Ping);
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}
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[Fact]
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public void ParseCommandType_identifies_pong()
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{
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// Go reference: gateway.go — keepalive GPONG response
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var result = GatewayCommands.ParseCommandType(GatewayCommands.Pong);
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result.ShouldBe(GatewayCommandType.Pong);
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}
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[Fact]
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public void ParseCommandType_returns_null_for_unknown()
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{
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// Unrecognized commands should return null for graceful handling
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var line = Encoding.UTF8.GetBytes("UNKNOWN something\r\n");
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var result = GatewayCommands.ParseCommandType(line);
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result.ShouldBeNull();
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}
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[Fact]
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public void Wire_format_constants_end_correctly()
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{
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// Go reference: gateway.go — all gateway commands use CRLF line endings
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var crlf = new byte[] { (byte)'\r', (byte)'\n' };
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GatewayCommands.Ping.TakeLast(2).ShouldBe(crlf);
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GatewayCommands.Pong.TakeLast(2).ShouldBe(crlf);
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GatewayCommands.Crlf.ShouldBe(crlf);
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}
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}
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