Joseph Doherty
53 lines
2.2 KiB
C#
53 lines
2.2 KiB
C#
using Shouldly;
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using Xunit;
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using ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.Cip;
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namespace ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.Tests.Cip;
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public sealed class MultipleServicePacketTests
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{
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[Fact]
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public void Msp_offsets_are_measured_from_the_count_field()
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{
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var a = new byte[] { 0x4C, 0x02, 0x91, 0x01, 0x41, 0x00, 0x01, 0x00 };
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var b = new byte[] { 0x4C, 0x02, 0x91, 0x01, 0x42, 0x00, 0x01, 0x00 };
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Convert.ToHexString(MultipleServicePacket.Build([a, b])).ShouldBe(
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"0A02200224010200" + "0600" + "0E00" + Convert.ToHexString(a) + Convert.ToHexString(b));
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MultipleServicePacket.BuildSize([8, 8]).ShouldBe(6 + 2 + 4 + 16);
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}
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[Fact]
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public void BuildSize_equals_built_length()
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{
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byte[][] reqs = [new byte[7], new byte[20], new byte[1]];
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MultipleServicePacket.Build(reqs).Length.ShouldBe(MultipleServicePacket.BuildSize([7, 20, 1]));
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}
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[Fact]
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public void Parse_splits_replies()
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{
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// outer reply data: count 2, offsets 6 and 14, reply1 (8 bytes), reply2 (6 bytes)
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var r1 = Convert.FromHexString("CC000000C400" + "0100"); // DINT-typed read reply, 8 bytes
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var r2 = Convert.FromHexString("CD000000" + "0000"); // write ok + 2 extra bytes
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var data = Convert.FromHexString("0200" + "0600" + "0E00").Concat(r1).Concat(r2).ToArray();
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var outer = new CipReply(0x0A, 0, [], data);
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var replies = MultipleServicePacket.Parse(outer, 2);
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replies.Count.ShouldBe(2);
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replies[0].Service.ShouldBe((byte)0x4C);
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Convert.ToHexString(replies[0].Data.ToArray()).ShouldBe("C4000100");
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replies[1].Service.ShouldBe((byte)0x4D);
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}
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[Fact]
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public void Parse_embedded_error_status_is_kept_per_reply()
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{
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var r1 = Convert.FromHexString("CC000400");
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var data = Convert.FromHexString("0100" + "0400").Concat(r1).ToArray();
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MultipleServicePacket.Parse(new CipReply(0x0A, 0x1E, [], data), 1)[0].GeneralStatus.ShouldBe((byte)0x04);
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}
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[Fact]
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public void Parse_wrong_count_throws() =>
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Should.Throw<AbTransportException>(() =>
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MultipleServicePacket.Parse(new CipReply(0x0A, 0, [], Convert.FromHexString("0100" + "0400" + "CC000000")), 2));
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}
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