Joseph Doherty
64 lines
2.7 KiB
C#
64 lines
2.7 KiB
C#
using Shouldly;
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using Xunit;
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namespace ZB.MOM.WW.OtOpcUa.Driver.Modbus.Tests;
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/// <summary>
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/// CONV-4 (Modbus leg) — Modbus keys per-host resilience per SLAVE UNIT
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/// (<c>host:port/unitN</c>). An equipment tag must carry its own <c>unitId</c> so multi-unit
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/// equipment tags key their own breaker; <see cref="ModbusDriver.ResolveHost"/> must resolve
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/// the equipment ref through the resolver rather than only matching authored names. Scope:
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/// <c>unitId</c> ONLY — the parser's other strictness gaps are R2-11's.
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/// </summary>
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[Trait("Category", "Unit")]
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public sealed class ModbusUnitIdResolveHostTests
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{
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private sealed class NoopTransport : IModbusTransport
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{
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public Task ConnectAsync(CancellationToken ct) => Task.CompletedTask;
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public Task<byte[]> SendAsync(byte unitId, byte[] pdu, CancellationToken ct)
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=> Task.FromResult(new byte[] { 0x03, 0x00 });
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public ValueTask DisposeAsync() => ValueTask.CompletedTask;
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}
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private static ModbusDriver NewDriver() => new(
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new ModbusDriverOptions { Host = "10.0.0.1", Port = 502, UnitId = 1, Probe = new ModbusProbeOptions { Enabled = false } },
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"modbus-1", _ => new NoopTransport());
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/// <summary>The parser reads an optional unitId into the transient definition.</summary>
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[Fact]
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public void Parser_reads_optional_unitId()
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{
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var json = """{"region":"HoldingRegisters","address":0,"dataType":"Int16","unitId":7}""";
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ModbusEquipmentTagParser.TryParse(json, out var def).ShouldBeTrue();
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def.UnitId.ShouldBe((byte)7);
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}
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/// <summary>An absent unitId leaves the definition on the driver-level default (null override).</summary>
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[Fact]
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public void Parser_absent_unitId_is_null()
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{
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var json = """{"region":"HoldingRegisters","address":0,"dataType":"Int16"}""";
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ModbusEquipmentTagParser.TryParse(json, out var def).ShouldBeTrue();
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def.UnitId.ShouldBeNull();
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}
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/// <summary>An equipment ref carrying a unitId keys its own per-unit host name.</summary>
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[Fact]
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public void EquipmentTag_WithUnitId_ResolvesPerUnitHostName()
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{
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var drv = NewDriver();
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var json = """{"region":"HoldingRegisters","address":0,"dataType":"Int16","unitId":7}""";
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drv.ResolveHost(json).ShouldBe("10.0.0.1:502/unit7");
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}
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/// <summary>An equipment ref without a unitId keys the driver-level unit host name.</summary>
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[Fact]
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public void EquipmentTag_WithoutUnitId_KeysDriverDefaultUnit()
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{
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var drv = NewDriver();
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var json = """{"region":"HoldingRegisters","address":0,"dataType":"Int16"}""";
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drv.ResolveHost(json).ShouldBe("10.0.0.1:502/unit1");
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}
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}
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