feat(historian-gateway): read cutover — AddServerHistorian builds GatewayHistorianDataSource

Claude-Session: https://claude.ai/code/session_012SDSQ3AcaXqPcBtDESBRii
2026-06-26 17:07:59 -04:00
parent 1d5fa8230e
commit 36f7c3c5bf
7 changed files with 213 additions and 9 deletions
@@ -0,0 +1,32 @@
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging.Abstractions;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Runtime.Historian;
+
+namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Gateway.Tests;
+
+/// <summary>
+/// Read-cutover seam tests (T10). Both assert offline construction only — the package client builds
+/// its <c>GrpcChannel</c> lazily, so neither the adapter ctor nor the factory dials the gateway. A
+/// bogus/unreachable endpoint must therefore construct without throwing or performing network I/O.
+/// </summary>
+public sealed class HistorianGatewayClientAdapterTests
+{
+    [Fact]
+    public void Adapter_constructs_from_options_without_dialing()
+    {
+        // Constructing the channel must not perform network I/O (lazy connect).
+        var opts = new ServerHistorianOptions { Enabled = true, Endpoint = "https://localhost:5222", ApiKey = "histgw_x_y" };
+        using var adapter = HistorianGatewayClientAdapter.Create(opts, NullLoggerFactory.Instance);
+        Assert.NotNull(adapter);
+    }
+
+    [Fact]
+    public void Factory_builds_GatewayHistorianDataSource()
+    {
+        var opts = new ServerHistorianOptions { Enabled = true, Endpoint = "https://localhost:5222", ApiKey = "histgw_x_y" };
+        using var services = new ServiceCollection().BuildServiceProvider();
+        var dataSource = GatewayHistorian.CreateDataSource(opts, services);
+        Assert.IsType<GatewayHistorianDataSource>(dataSource);
+    }
+}
@@ -13,6 +13,8 @@
        <PackageReference Include="xunit.v3"/>
        <PackageReference Include="Shouldly"/>
        <PackageReference Include="Microsoft.NET.Test.Sdk"/>
+        <!-- ServiceCollection + BuildServiceProvider for the CreateDataSource factory test. -->
+        <PackageReference Include="Microsoft.Extensions.DependencyInjection"/>
        <PackageReference Include="xunit.runner.visualstudio">
            <PrivateAssets>all</PrivateAssets>
            <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>