Joseph Doherty
75 lines
3.2 KiB
C#
75 lines
3.2 KiB
C#
using System.Buffers.Binary;
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using System.Text;
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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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using ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.Logix;
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using ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.Tests.Captures;
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namespace ZB.MOM.WW.OtOpcUa.Driver.Ab.Transport.Tests.Logix;
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public sealed class SymbolObjectServicesTests
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{
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private static readonly string[] ExpectedNames =
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["Motor_Run", "Line1_Count", "Pump_1_Speed", "TestArray", "TestString", "TestSINT", "TestBOOL", "TestREAL", "TestDINT"];
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[Fact]
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public void Request_matches_capture()
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{
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// libplctag requests attributes 2,7,8,1 in that order -- same as the brief; no change needed.
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var cap = CaptureFile.CipPayload(CaptureFile.Load("logix-tags-listing.hex").First(f => f.FromClient));
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SymbolObjectServices.GetInstanceAttributeList(null, 0).ShouldBe(cap);
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}
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[Fact]
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public void Request_with_program_scope_and_start_instance() =>
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Convert.ToHexString(SymbolObjectServices.GetInstanceAttributeList("Main", 0x0102)).ShouldBe(
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"550A" + "910C" + Convert.ToHexString(Encoding.ASCII.GetBytes("Program:Main"))
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+ "206B2500" + "0201" + "0400" + "0200" + "0700" + "0800" + "0100");
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[Fact]
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public void Captured_reply_entries_have_the_decoder_layout()
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{
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var reply = CipReply.Parse(CaptureFile.CipPayload(CaptureFile.Load("logix-tags-listing.hex").First(f => !f.FromClient)));
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var (entries, last, more) = SymbolObjectServices.ParseListingReply(reply);
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more.ShouldBeFalse();
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last.ShouldBe(9u);
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var names = new List<string>();
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var pos = 0;
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uint expectedInstance = 1;
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while (pos < entries.Length)
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{
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BinaryPrimitives.ReadUInt32LittleEndian(entries.AsSpan(pos)).ShouldBe(expectedInstance++);
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var nameLen = BinaryPrimitives.ReadUInt16LittleEndian(entries.AsSpan(pos + 20));
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names.Add(Encoding.ASCII.GetString(entries, pos + 22, nameLen));
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pos += 22 + nameLen;
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}
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names.ShouldBe(ExpectedNames);
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}
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[Fact]
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public void More_flag_follows_status_0x06()
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{
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var entry = Convert.FromHexString("05000000" + "C400" + "0400" + "00000000" + "00000000" + "00000000" + "0100" + "41");
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var reply = new CipReply(0x55, 0x06, [], entry);
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var (entries, last, more) = SymbolObjectServices.ParseListingReply(reply);
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more.ShouldBeTrue(); last.ShouldBe(5u); entries.ShouldBe(entry);
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}
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[Fact]
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public void Failure_status_throws() =>
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Should.Throw<AbTransportException>(() =>
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SymbolObjectServices.ParseListingReply(new CipReply(0x55, 0x04, [], ReadOnlyMemory<byte>.Empty)));
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[Fact]
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public void Start_instance_above_16_bits_uses_32_bit_segment() =>
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Convert.ToHexString(SymbolObjectServices.GetInstanceAttributeList(null, 0x12345)).ShouldBe(
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"5504" + "206B" + "2600" + "45230100" + "0400" + "0200" + "0700" + "0800" + "0100");
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[Fact]
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public void More_with_no_entries_throws() =>
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Should.Throw<AbTransportException>(() =>
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SymbolObjectServices.ParseListingReply(new CipReply(0x55, 0x06, [], ReadOnlyMemory<byte>.Empty)))
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.Status.ShouldBe(AbStatus.BadReply);
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}
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