feat(drivers): shared EquipmentTagRefResolver (by-name + parse-on-miss + cache)

2026-06-13 11:07:23 -04:00
parent 6b041c6daa
commit eaa335d779
2 changed files with 100 additions and 0 deletions
@@ -0,0 +1,54 @@
+using Shouldly;
+using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
+using Xunit;
+
+namespace ZB.MOM.WW.OtOpcUa.Core.Abstractions.Tests;
+
+public class EquipmentTagRefResolverTests
+{
+    private sealed record Def(string Id);
+
+    private static EquipmentTagRefResolver<Def> Make(
+        Dictionary<string, Def> byName, Func<string, Def?> parse)
+        => new(r => byName.TryGetValue(r, out var d) ? d : null, parse);
+
+    [Fact]
+    public void Legacy_name_resolves_via_byName()
+    {
+        var r = Make(new() { ["Temp"] = new Def("Temp") }, _ => null);
+        r.TryResolve("Temp", out var def).ShouldBeTrue();
+        def!.Id.ShouldBe("Temp");
+    }
+
+    [Fact]
+    public void Equipment_ref_resolves_via_parse_and_is_cached()
+    {
+        var calls = 0;
+        var r = Make(new(), reference => { calls++; return reference.StartsWith("{") ? new Def(reference) : null; });
+        r.TryResolve("{\"a\":1}", out var d1).ShouldBeTrue();
+        r.TryResolve("{\"a\":1}", out var d2).ShouldBeTrue();
+        d1!.Id.ShouldBe("{\"a\":1}");
+        calls.ShouldBe(1);
+    }
+
+    [Fact]
+    public void Garbage_ref_returns_false_and_caches_negative()
+    {
+        var calls = 0;
+        var r = Make(new(), _ => { calls++; return null; });
+        r.TryResolve("nope", out _).ShouldBeFalse();
+        r.TryResolve("nope", out _).ShouldBeFalse();
+        calls.ShouldBe(1);
+    }
+
+    [Fact]
+    public void Clear_drops_transient_cache()
+    {
+        var calls = 0;
+        var r = Make(new(), reference => { calls++; return new Def(reference); });
+        r.TryResolve("{\"a\":1}", out _).ShouldBeTrue();
+        r.Clear();
+        r.TryResolve("{\"a\":1}", out _).ShouldBeTrue();
+        calls.ShouldBe(2);
+    }
+}