Joseph Doherty
70 lines
3.1 KiB
C#
70 lines
3.1 KiB
C#
using Shouldly;
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using Xunit;
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using ZB.MOM.WW.OtOpcUa.Driver.AbCip;
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namespace ZB.MOM.WW.OtOpcUa.Driver.AbCip.Tests;
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/// <summary>
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/// A controller's <c>@tags</c> listing names each program (<c>Program:UN01_Press</c>, a system
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/// symbol) but none of its tags — those are listed only by <c>Program:<name>.@tags</c>.
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/// Seen live on a production press: the PackML state (<c>Program:UN01_Press.Out_eState</c>) and
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/// every alarm bit the Ignition project reads are program-scoped, and the browse showed none.
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/// </summary>
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[Trait("Category", "Unit")]
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public sealed class AbCipProgramScopeEnumerationTests
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{
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// Captured entries (CompactLogix 5069-L320ERS2 rev 34.11): WW_InCycle + the Program:UN01_Press entry
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// from @tags, and Out_eState from Program:UN01_Press.@tags.
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private const string ControllerListing =
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"AF010000C10001000000000000000000000000000A0057575F496E4379636C65" +
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"7900000068100000000000000000000000000000120050726F6772616D3A554E30315F5072657373";
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private const string Un01Listing = "1A000000C40004000000000000000000000000000A004F75745F655374617465";
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private static readonly AbCipTagCreateParams Params = new(
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Gateway: "10.0.0.5", Port: 44818, CipPath: "1,0", LibplctagPlcAttribute: "controllogix",
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TagName: "@tags", Timeout: TimeSpan.FromSeconds(2));
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/// <summary>The enumerator reads each program's own listing and yields its tags program-scoped.</summary>
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[Fact]
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public async Task Program_scoped_tags_are_enumerated_from_each_program_listing()
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{
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var reads = new List<string>();
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using var enumerator = new SymbolListingEnumerator((_, name, _) =>
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{
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reads.Add(name);
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return Task.FromResult(name switch
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{
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"@tags" => Convert.FromHexString(ControllerListing),
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"Program:UN01_Press.@tags" => Convert.FromHexString(Un01Listing),
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_ => throw new InvalidOperationException(name),
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});
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});
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var tags = new List<AbCipDiscoveredTag>();
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await foreach (var t in enumerator.EnumerateAsync(Params, TestContext.Current.CancellationToken))
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tags.Add(t);
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reads.ShouldBe(["@tags", "Program:UN01_Press.@tags"]);
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var outState = tags.Single(t => t.Name == "Out_eState");
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outState.ProgramScope.ShouldBe("UN01_Press");
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outState.DataType.ShouldBe(AbCipDataType.DInt);
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tags.ShouldContain(t => t.Name == "WW_InCycle" && t.ProgramScope == null);
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}
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/// <summary>One unreadable program listing does not cost the controller tags or other programs.</summary>
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[Fact]
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public async Task A_failing_program_listing_is_skipped()
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{
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using var enumerator = new SymbolListingEnumerator((_, name, _) => name == "@tags"
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? Task.FromResult(Convert.FromHexString(ControllerListing))
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: Task.FromException<byte[]>(new InvalidOperationException("ErrorNotFound")));
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var tags = new List<AbCipDiscoveredTag>();
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await foreach (var t in enumerator.EnumerateAsync(Params, TestContext.Current.CancellationToken))
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tags.Add(t);
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tags.ShouldContain(t => t.Name == "WW_InCycle");
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}
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}
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