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Add integration test harness: OpcUaServiceBuilder + OpcUaServerFixture

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OpcUaServiceBuilder provides fluent API for constructing OpcUaService
with dependency overrides (IMxProxy, IGalaxyRepository, IMxAccessClient).
WithMxAccessClient skips the STA thread and COM interop entirely.

OpcUaServerFixture wraps the service lifecycle with automatic port
allocation (atomic counter starting at 16000), guaranteed cleanup via
IAsyncLifetime, and factory methods for common test scenarios:
- WithFakes() — FakeMxProxy + FakeGalaxyRepository with standard data
- WithFakeMxAccessClient() — bypasses COM, fastest for most tests

Also adds TestData helper with reusable hierarchy/attributes matching
gr/layout.md, and 5 fixture tests verifying startup, shutdown, port
isolation, and address space building.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Joseph Doherty
2026-03-25 06:22:31 -04:00
parent a0edac81fb
commit 44177acf64
5 changed files with 385 additions and 6 deletions
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27
src/ZB.MOM.WW.LmxOpcUa.Host/OpcUaService.cs
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@@ -22,11 +22,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
private readonly AppConfiguration _config;
private readonly IMxProxy? _mxProxy;
private readonly IGalaxyRepository? _galaxyRepository;
private readonly IMxAccessClient? _mxAccessClientOverride;
private readonly bool _hasMxAccessClientOverride;
private CancellationTokenSource? _cts;
private PerformanceMetrics? _metrics;
private StaComThread? _staThread;
private MxAccessClient? _mxAccessClient;
private IMxAccessClient? _mxAccessClientForWiring;
private ChangeDetectionService? _changeDetection;
private OpcUaServerHost? _serverHost;
private LmxNodeManager? _nodeManager;
@@ -59,11 +62,14 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
/// <summary>
/// Test constructor. Accepts injected dependencies.
/// </summary>
internal OpcUaService(AppConfiguration config, IMxProxy? mxProxy, IGalaxyRepository? galaxyRepository)
internal OpcUaService(AppConfiguration config, IMxProxy? mxProxy, IGalaxyRepository? galaxyRepository,
IMxAccessClient? mxAccessClientOverride = null, bool hasMxAccessClientOverride = false)
{
_config = config;
_mxProxy = mxProxy;
_galaxyRepository = galaxyRepository;
_mxAccessClientOverride = mxAccessClientOverride;
_hasMxAccessClientOverride = hasMxAccessClientOverride;
}
public void Start()
@@ -87,7 +93,16 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
_metrics = new PerformanceMetrics();
// Step 5: Create MxAccessClient → Connect
if (_mxProxy != null)
if (_hasMxAccessClientOverride)
{
// Test path: use injected IMxAccessClient directly (skips STA thread + COM)
_mxAccessClientForWiring = _mxAccessClientOverride;
if (_mxAccessClientForWiring != null && _mxAccessClientForWiring.State != ConnectionState.Connected)
{
_mxAccessClientForWiring.ConnectAsync(_cts.Token).GetAwaiter().GetResult();
}
}
else if (_mxProxy != null)
{
try
{
@@ -121,8 +136,8 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
}
// Step 8: Create OPC UA server host + node manager
IMxAccessClient mxClient = _mxAccessClient ?? (IMxAccessClient)new NullMxAccessClient();
_serverHost = new OpcUaServerHost(_config.OpcUa, mxClient, _metrics);
var effectiveMxClient = (IMxAccessClient?)_mxAccessClient ?? _mxAccessClientForWiring ?? new NullMxAccessClient();
_serverHost = new OpcUaServerHost(_config.OpcUa, effectiveMxClient, _metrics);
// Step 9-10: Query hierarchy, start server, build address space
if (_galaxyRepository != null && _galaxyStats.DbConnected)
@@ -170,7 +185,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
// Step 13: Dashboard
_healthCheck = new HealthCheckService();
_statusReport = new StatusReportService(_healthCheck, _config.Dashboard.RefreshIntervalSeconds);
_statusReport.SetComponents(_mxAccessClient, _metrics, _galaxyStats, _serverHost);
_statusReport.SetComponents(effectiveMxClient, _metrics, _galaxyStats, _serverHost);
if (_config.Dashboard.Enabled)
{
@@ -253,7 +268,7 @@ namespace ZB.MOM.WW.LmxOpcUa.Host
}
// Accessors for testing
internal IMxAccessClient? MxClient => _mxAccessClient;
internal IMxAccessClient? MxClient => (IMxAccessClient?)_mxAccessClient ?? _mxAccessClientForWiring;
internal PerformanceMetrics? Metrics => _metrics;
internal OpcUaServerHost? ServerHost => _serverHost;
internal LmxNodeManager? NodeManagerInstance => _nodeManager;