Initialize encoder fuzz ServiceMessageContext (OPC 10000-6)

fuzzing/Opc.Ua.Encoders.Fuzz.Tests/EncoderTests.cs

@@ -42,9 +42,15 @@ public class EncoderTests : FuzzTargetTestsBase
 
         protected override Type FuzzableCodeType => typeof(FuzzableCode);
 
-        protected override void OnFuzzTargetSetup(ITelemetryContext telemetry)
+        [Test]
+        public void MessageContextIsInitializedWithoutTestSetup()
         {
-            FuzzableCode.MessageContext = ServiceMessageContext.Create(telemetry);
+            ServiceMessageContext firstContext = FuzzableCode.MessageContext;
+            ServiceMessageContext secondContext = FuzzableCode.MessageContext;
+
+            Assert.That(firstContext, Is.Not.Null);
+            Assert.That(firstContext, Is.SameAs(secondContext));
+            Assert.That(firstContext.Factory, Is.Not.Null);
         }
     }
 }

fuzzing/Opc.Ua.Encoders.Fuzz.Tests/Issue3546RoundTripTests.cs

@@ -29,7 +29,6 @@
 
 using System.IO;
 using NUnit.Framework;
-using Opc.Ua.Tests;
 
 namespace Opc.Ua.Fuzzing
 {
@@ -58,13 +57,6 @@ public class Issue3546RoundTripTests
     {
         private static readonly uint[] s_arrayDimensions = [1u, 2u];
 
-        [SetUp]
-        public void Setup()
-        {
-            ITelemetryContext telemetry = NUnitTelemetryContext.Create();
-            FuzzableCode.MessageContext = ServiceMessageContext.Create(telemetry);
-        }
-
         [Test]
         public void DataTypeNodeWithReferencesRoundTripsCleanly()
         {

fuzzing/Opc.Ua.Encoders.Fuzz.Tools/Encoders.Testcases.cs

@@ -47,11 +47,10 @@ public enum TestCaseEncoders
         /// Run the encoder test cases
         /// </summary>
         /// <param name="workPath"></param>
-        /// <param name="telemetry">The telemetry context to use to create obvservability instruments</param>
+        /// <param name="telemetry">Unused; retained for the common fuzz-tool signature.</param>
         public static void Run(string workPath, ITelemetryContext telemetry)
         {
-            // Create the Testcases for the binary decoder.
-            FuzzableCode.MessageContext = ServiceMessageContext.Create(telemetry);
+            _ = telemetry;
             string pathSuffix = GetTestcaseEncoderSuffix(TestCaseEncoders.Binary);
             string pathTarget = workPath + pathSuffix + Path.DirectorySeparatorChar;
             Directory.CreateDirectory(pathTarget);

fuzzing/Opc.Ua.Encoders.Fuzz/FuzzableCode.cs

@@ -29,13 +29,15 @@
 
 using System;
 using System.IO;
+using Microsoft.Extensions.Logging.Abstractions;
 using Opc.Ua.Bindings;
 
 namespace Opc.Ua.Fuzzing
 {
     public static partial class FuzzableCode
     {
-        public static ServiceMessageContext MessageContext { get; set; }
+        public static ServiceMessageContext MessageContext { get; } =
+            ServiceMessageContext.Create(new FuzzTelemetryContext());
 
         /// <summary>
         /// Print information about the fuzzer target.
@@ -70,5 +72,13 @@ private static MemoryStream PrepareArraySegmentStream(Stream stream)
 
             return memoryStream;
         }
+
+        private sealed class FuzzTelemetryContext : TelemetryContextBase
+        {
+            public FuzzTelemetryContext()
+                : base(NullLoggerFactory.Instance)
+            {
+            }
+        }
     }
 }