test(opcuaclient.browser): opc-plc integration round-trip

ZB.MOM.WW.OtOpcUa.slnx

@@ -101,6 +101,7 @@
     <Project Path="tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Tests/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Tests.csproj" />
     <Project Path="tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.IntegrationTests/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.IntegrationTests.csproj" />
     <Project Path="tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.Tests/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.Tests.csproj" />
+    <Project Path="tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.IntegrationTests/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.IntegrationTests.csproj" />
   </Folder>
   <Folder Name="/tests/Drivers/Driver CLIs/">
     <Project Path="tests/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.Cli.Common.Tests/ZB.MOM.WW.OtOpcUa.Driver.Cli.Common.Tests.csproj" />

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.IntegrationTests/BrowseRoundTripTests.cs

@@ -0,0 +1,53 @@
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Commons.Browsing;
+using ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser;
+
+namespace ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.IntegrationTests;
+
+/// <summary>
+///     End-to-end test against opc-plc Docker fixture. Validates that NodeId strings returned
+///     by RootAsync/ExpandAsync round-trip cleanly through ExpandAsync — the regression test
+///     for namespace-stable address encoding.
+/// </summary>
+[Trait("Category", "Integration"), Trait("Fixture", "opc-plc")]
+public class BrowseRoundTripTests
+{
+    [Fact]
+    public async Task Three_level_expand_round_trips_resolve_back()
+    {
+        var endpoint = Environment.GetEnvironmentVariable("OPCUA_SIM_ENDPOINT")
+                       ?? "opc.tcp://10.100.0.35:50000";
+        // Numeric ordinals because the production browser uses default System.Text.Json
+        // without a JsonStringEnumConverter (SecurityPolicy.None=0, SecurityMode.None=0,
+        // AuthType.Anonymous=0).
+        var json = $$"""
+            {
+                "EndpointUrl":"{{endpoint}}",
+                "SecurityPolicy":0,"SecurityMode":0,"AuthType":0,
+                "SessionTimeout":"00:01:00","Timeout":"00:00:10","PerEndpointConnectTimeout":"00:00:10"
+            }
+            """;
+
+        var browser = new OpcUaClientDriverBrowser();
+        await using var session = await browser.OpenAsync(json, TestContext.Current.CancellationToken);
+
+        var roots = await session.RootAsync(TestContext.Current.CancellationToken);
+        var current = roots.FirstOrDefault(n => n.HasChildrenHint);
+        current.ShouldNotBeNull("expected at least one Folder under ObjectsFolder on opc-plc");
+
+        // Drill down up to 2 more levels by alternately expanding the first Folder
+        for (var depth = 0; depth < 2; depth++)
+        {
+            var next = await session.ExpandAsync(current!.NodeId, TestContext.Current.CancellationToken);
+            var step = next.FirstOrDefault(n => n.HasChildrenHint);
+            if (step is null) break;
+            current = step;
+        }
+
+        // Round-trip the leaf-most reachable folder string — must resolve back through the
+        // namespace map, prove the nsu= encoding survives.
+        var children = await session.ExpandAsync(current!.NodeId, TestContext.Current.CancellationToken);
+        children.ShouldNotBeNull();
+    }
+}

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.IntegrationTests/ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.IntegrationTests.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net10.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <IsPackable>false</IsPackable>
+        <IsTestProject>true</IsTestProject>
+        <RootNamespace>ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.IntegrationTests</RootNamespace>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="xunit.v3"/>
+        <PackageReference Include="Shouldly"/>
+        <PackageReference Include="Microsoft.NET.Test.Sdk"/>
+        <PackageReference Include="xunit.runner.visualstudio">
+            <PrivateAssets>all</PrivateAssets>
+            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\..\src\Drivers\ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser\ZB.MOM.WW.OtOpcUa.Driver.OpcUaClient.Browser.csproj" />
+        <ProjectReference Include="..\..\..\src\Core\ZB.MOM.WW.OtOpcUa.Commons\ZB.MOM.WW.OtOpcUa.Commons.csproj" />
+    </ItemGroup>
+
+</Project>