979 lines
34 KiB
C#
979 lines
34 KiB
C#
using Opc.Ua;
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using Shouldly;
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using Xunit;
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using ZB.MOM.WW.LmxOpcUa.Client.Shared.Models;
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using ZB.MOM.WW.LmxOpcUa.Client.Shared.Tests.Fakes;
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namespace ZB.MOM.WW.LmxOpcUa.Client.Shared.Tests;
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/// <summary>
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/// Verifies the shared OPC UA client service behaviors for connection management, browsing, subscriptions, history, alarms, and redundancy.
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/// </summary>
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public class OpcUaClientServiceTests : IDisposable
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{
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private readonly FakeApplicationConfigurationFactory _configFactory = new();
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private readonly FakeEndpointDiscovery _endpointDiscovery = new();
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private readonly OpcUaClientService _service;
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private readonly FakeSessionFactory _sessionFactory = new();
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public OpcUaClientServiceTests()
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{
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_service = new OpcUaClientService(_configFactory, _endpointDiscovery, _sessionFactory);
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}
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/// <summary>
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/// Releases the shared client service after each test so session and subscription state do not leak between scenarios.
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/// </summary>
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public void Dispose()
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{
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_service.Dispose();
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}
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private ConnectionSettings ValidSettings(string url = "opc.tcp://localhost:4840")
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{
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return new ConnectionSettings
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{
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EndpointUrl = url,
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SessionTimeoutSeconds = 60
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};
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}
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// --- Connection tests ---
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/// <summary>
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/// Verifies that a valid connection request returns populated connection metadata and marks the client as connected.
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/// </summary>
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[Fact]
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public async Task ConnectAsync_ValidSettings_ReturnsConnectionInfo()
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{
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var info = await _service.ConnectAsync(ValidSettings());
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info.ShouldNotBeNull();
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info.EndpointUrl.ShouldBe("opc.tcp://localhost:4840");
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_service.IsConnected.ShouldBeTrue();
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_service.CurrentConnectionInfo.ShouldBe(info);
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}
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/// <summary>
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/// Verifies that invalid connection settings fail validation before any OPC UA session is created.
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/// </summary>
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[Fact]
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public async Task ConnectAsync_InvalidSettings_ThrowsBeforeCreatingSession()
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{
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var settings = new ConnectionSettings { EndpointUrl = "" };
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await Should.ThrowAsync<ArgumentException>(() => _service.ConnectAsync(settings));
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_sessionFactory.CreateCallCount.ShouldBe(0);
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_service.IsConnected.ShouldBeFalse();
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}
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/// <summary>
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/// Verifies that server and security details from the session are copied into the exposed connection info.
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/// </summary>
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[Fact]
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public async Task ConnectAsync_PopulatesConnectionInfo()
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{
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var session = new FakeSessionAdapter
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{
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ServerName = "MyServer",
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SecurityMode = "Sign",
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SecurityPolicyUri = "http://opcfoundation.org/UA/SecurityPolicy#Basic256Sha256",
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SessionId = "ns=0;i=999",
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SessionName = "TestSession"
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};
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_sessionFactory.EnqueueSession(session);
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var info = await _service.ConnectAsync(ValidSettings());
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info.ServerName.ShouldBe("MyServer");
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info.SecurityMode.ShouldBe("Sign");
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info.SecurityPolicyUri.ShouldBe("http://opcfoundation.org/UA/SecurityPolicy#Basic256Sha256");
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info.SessionId.ShouldBe("ns=0;i=999");
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info.SessionName.ShouldBe("TestSession");
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}
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/// <summary>
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/// Verifies that connection-state transitions are raised for the connecting and connected phases.
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/// </summary>
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[Fact]
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public async Task ConnectAsync_RaisesConnectionStateChangedEvents()
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{
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var events = new List<ConnectionStateChangedEventArgs>();
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_service.ConnectionStateChanged += (_, e) => events.Add(e);
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await _service.ConnectAsync(ValidSettings());
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events.Count.ShouldBe(2);
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events[0].OldState.ShouldBe(ConnectionState.Disconnected);
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events[0].NewState.ShouldBe(ConnectionState.Connecting);
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events[1].OldState.ShouldBe(ConnectionState.Connecting);
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events[1].NewState.ShouldBe(ConnectionState.Connected);
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}
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/// <summary>
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/// Verifies that a failed session creation leaves the client in the disconnected state.
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/// </summary>
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[Fact]
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public async Task ConnectAsync_SessionFactoryFails_TransitionsToDisconnected()
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{
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_sessionFactory.ThrowOnCreate = true;
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var events = new List<ConnectionStateChangedEventArgs>();
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_service.ConnectionStateChanged += (_, e) => events.Add(e);
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await Should.ThrowAsync<InvalidOperationException>(() => _service.ConnectAsync(ValidSettings()));
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_service.IsConnected.ShouldBeFalse();
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events.Last().NewState.ShouldBe(ConnectionState.Disconnected);
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}
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/// <summary>
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/// Verifies that username and password settings are passed through to the session-creation pipeline.
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/// </summary>
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[Fact]
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public async Task ConnectAsync_WithUsername_PassesThroughToFactory()
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{
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var settings = ValidSettings();
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settings.Username = "admin";
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settings.Password = "secret";
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await _service.ConnectAsync(settings);
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_configFactory.LastSettings!.Username.ShouldBe("admin");
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_configFactory.LastSettings!.Password.ShouldBe("secret");
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}
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// --- Disconnect tests ---
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/// <summary>
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/// Verifies that disconnect closes the active session and clears exposed connection state.
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/// </summary>
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[Fact]
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public async Task DisconnectAsync_WhenConnected_ClosesSession()
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{
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await _service.ConnectAsync(ValidSettings());
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var session = _sessionFactory.CreatedSessions[0];
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await _service.DisconnectAsync();
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session.Closed.ShouldBeTrue();
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_service.IsConnected.ShouldBeFalse();
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_service.CurrentConnectionInfo.ShouldBeNull();
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}
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/// <summary>
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/// Verifies that disconnect is safe to call when no server session is active.
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/// </summary>
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[Fact]
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public async Task DisconnectAsync_WhenNotConnected_IsIdempotent()
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{
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await _service.DisconnectAsync(); // Should not throw
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_service.IsConnected.ShouldBeFalse();
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}
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/// <summary>
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/// Verifies that repeated disconnect calls do not throw after cleanup has already run.
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/// </summary>
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[Fact]
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public async Task DisconnectAsync_CalledTwice_IsIdempotent()
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{
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await _service.ConnectAsync(ValidSettings());
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await _service.DisconnectAsync();
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await _service.DisconnectAsync(); // Should not throw
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}
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// --- Read tests ---
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/// <summary>
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/// Verifies that a connected client can read the current value of a node through the session adapter.
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/// </summary>
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[Fact]
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public async Task ReadValueAsync_WhenConnected_ReturnsValue()
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{
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var session = new FakeSessionAdapter
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{
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ReadResponse = new DataValue(new Variant(42), StatusCodes.Good)
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};
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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var result = await _service.ReadValueAsync(new NodeId("ns=2;s=MyNode"));
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result.Value.ShouldBe(42);
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session.ReadCount.ShouldBe(1);
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}
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/// <summary>
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/// Verifies that reads are rejected when the client is not connected to a server.
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/// </summary>
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[Fact]
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public async Task ReadValueAsync_WhenDisconnected_Throws()
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{
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await Should.ThrowAsync<InvalidOperationException>(() =>
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_service.ReadValueAsync(new NodeId("ns=2;s=MyNode")));
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}
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/// <summary>
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/// Verifies that session-level read failures are surfaced to callers instead of being swallowed.
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/// </summary>
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[Fact]
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public async Task ReadValueAsync_SessionThrows_PropagatesException()
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{
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var session = new FakeSessionAdapter { ThrowOnRead = true };
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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await Should.ThrowAsync<ServiceResultException>(() =>
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_service.ReadValueAsync(new NodeId("ns=2;s=MyNode")));
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}
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// --- Write tests ---
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/// <summary>
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/// Verifies that writes succeed through the session adapter when the client is connected.
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/// </summary>
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[Fact]
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public async Task WriteValueAsync_WhenConnected_WritesValue()
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{
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var session = new FakeSessionAdapter
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{
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ReadResponse = new DataValue(new Variant(0), StatusCodes.Good),
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WriteResponse = StatusCodes.Good
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};
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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var result = await _service.WriteValueAsync(new NodeId("ns=2;s=MyNode"), 42);
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result.ShouldBe(StatusCodes.Good);
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session.WriteCount.ShouldBe(1);
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}
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/// <summary>
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/// Verifies that string inputs are coerced to the node's current data type before writing.
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/// </summary>
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[Fact]
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public async Task WriteValueAsync_StringValue_CoercesToTargetType()
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{
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var session = new FakeSessionAdapter
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{
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ReadResponse = new DataValue(new Variant(0), StatusCodes.Good) // int type
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};
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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await _service.WriteValueAsync(new NodeId("ns=2;s=MyNode"), "42");
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session.WriteCount.ShouldBe(1);
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session.ReadCount.ShouldBe(1); // Read for type inference
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}
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/// <summary>
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/// Verifies that non-string values are written directly without an extra type-inference read.
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/// </summary>
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[Fact]
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public async Task WriteValueAsync_NonStringValue_WritesDirectly()
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{
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var session = new FakeSessionAdapter();
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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await _service.WriteValueAsync(new NodeId("ns=2;s=MyNode"), 42);
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session.WriteCount.ShouldBe(1);
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session.ReadCount.ShouldBe(0); // No read for non-string values
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}
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/// <summary>
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/// Verifies that writes are rejected when the client is disconnected.
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/// </summary>
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[Fact]
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public async Task WriteValueAsync_WhenDisconnected_Throws()
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{
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await Should.ThrowAsync<InvalidOperationException>(() =>
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_service.WriteValueAsync(new NodeId("ns=2;s=MyNode"), 42));
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}
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// --- Browse tests ---
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/// <summary>
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/// Verifies that browse results are mapped into the client browse model used by CLI and UI consumers.
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/// </summary>
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[Fact]
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public async Task BrowseAsync_WhenConnected_ReturnsMappedResults()
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{
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var session = new FakeSessionAdapter
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{
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BrowseResponse =
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[
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new ReferenceDescription
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{
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NodeId = new ExpandedNodeId("ns=2;s=Child1"),
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DisplayName = new LocalizedText("Child1"),
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NodeClass = NodeClass.Variable
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}
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]
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};
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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var results = await _service.BrowseAsync();
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results.Count.ShouldBe(1);
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results[0].DisplayName.ShouldBe("Child1");
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results[0].NodeClass.ShouldBe("Variable");
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results[0].HasChildren.ShouldBeFalse(); // Variable nodes don't check HasChildren
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}
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/// <summary>
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/// Verifies that a null browse root defaults to the OPC UA Objects folder.
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/// </summary>
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[Fact]
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public async Task BrowseAsync_NullParent_UsesObjectsFolder()
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{
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var session = new FakeSessionAdapter
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{
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BrowseResponse = []
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};
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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await _service.BrowseAsync();
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session.BrowseCount.ShouldBe(1);
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}
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/// <summary>
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/// Verifies that object nodes trigger child-detection checks so the client can mark expandable branches.
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/// </summary>
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[Fact]
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public async Task BrowseAsync_ObjectNode_ChecksHasChildren()
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{
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var session = new FakeSessionAdapter
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{
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BrowseResponse =
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[
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new ReferenceDescription
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{
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NodeId = new ExpandedNodeId("ns=2;s=Folder1"),
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DisplayName = new LocalizedText("Folder1"),
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NodeClass = NodeClass.Object
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}
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],
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HasChildrenResponse = true
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};
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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var results = await _service.BrowseAsync();
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results[0].HasChildren.ShouldBeTrue();
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session.HasChildrenCount.ShouldBe(1);
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}
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/// <summary>
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/// Verifies that browse continuation points are followed so multi-page address-space branches are fully returned.
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/// </summary>
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[Fact]
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public async Task BrowseAsync_WithContinuationPoint_FollowsIt()
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{
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var session = new FakeSessionAdapter
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{
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BrowseResponse =
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[
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new ReferenceDescription
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{
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NodeId = new ExpandedNodeId("ns=2;s=A"),
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DisplayName = new LocalizedText("A"),
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NodeClass = NodeClass.Variable
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}
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],
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BrowseContinuationPoint = [1, 2, 3],
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BrowseNextResponse =
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[
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new ReferenceDescription
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{
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NodeId = new ExpandedNodeId("ns=2;s=B"),
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DisplayName = new LocalizedText("B"),
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NodeClass = NodeClass.Variable
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}
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],
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BrowseNextContinuationPoint = null
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};
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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var results = await _service.BrowseAsync();
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results.Count.ShouldBe(2);
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session.BrowseNextCount.ShouldBe(1);
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}
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/// <summary>
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/// Verifies that browse requests are rejected when the client is disconnected.
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/// </summary>
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[Fact]
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public async Task BrowseAsync_WhenDisconnected_Throws()
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{
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await Should.ThrowAsync<InvalidOperationException>(() => _service.BrowseAsync());
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}
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// --- Subscribe tests ---
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/// <summary>
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/// Verifies that subscribing to a node creates a monitored item on a data-change subscription.
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/// </summary>
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[Fact]
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public async Task SubscribeAsync_CreatesSubscription()
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{
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var session = new FakeSessionAdapter();
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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await _service.SubscribeAsync(new NodeId("ns=2;s=MyNode"), 500);
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session.CreatedSubscriptions.Count.ShouldBe(1);
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session.CreatedSubscriptions[0].AddDataChangeCount.ShouldBe(1);
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}
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/// <summary>
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/// Verifies that duplicate subscribe requests for the same node do not create duplicate monitored items.
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/// </summary>
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[Fact]
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public async Task SubscribeAsync_DuplicateNode_IsIdempotent()
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{
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var session = new FakeSessionAdapter();
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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await _service.SubscribeAsync(new NodeId("ns=2;s=MyNode"));
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await _service.SubscribeAsync(new NodeId("ns=2;s=MyNode")); // duplicate
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session.CreatedSubscriptions[0].AddDataChangeCount.ShouldBe(1);
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}
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/// <summary>
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/// Verifies that data-change notifications from the subscription are raised through the shared client event.
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/// </summary>
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[Fact]
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public async Task SubscribeAsync_RaisesDataChangedEvent()
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{
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var fakeSub = new FakeSubscriptionAdapter();
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var session = new FakeSessionAdapter { NextSubscription = fakeSub };
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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DataChangedEventArgs? received = null;
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_service.DataChanged += (_, e) => received = e;
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await _service.SubscribeAsync(new NodeId("ns=2;s=MyNode"), 500);
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// Simulate data change
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var handle = fakeSub.ActiveHandles.First();
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fakeSub.SimulateDataChange(handle, new DataValue(new Variant(99), StatusCodes.Good));
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received.ShouldNotBeNull();
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received!.NodeId.ShouldBe("ns=2;s=MyNode");
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received.Value.Value.ShouldBe(99);
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}
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/// <summary>
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/// Verifies that unsubscribing removes the corresponding monitored item from the active subscription.
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/// </summary>
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[Fact]
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public async Task UnsubscribeAsync_RemovesMonitoredItem()
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{
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var fakeSub = new FakeSubscriptionAdapter();
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var session = new FakeSessionAdapter { NextSubscription = fakeSub };
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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await _service.SubscribeAsync(new NodeId("ns=2;s=MyNode"));
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await _service.UnsubscribeAsync(new NodeId("ns=2;s=MyNode"));
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fakeSub.RemoveCount.ShouldBe(1);
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}
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/// <summary>
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/// Verifies that unsubscribing an unknown node is treated as a safe no-op.
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/// </summary>
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[Fact]
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public async Task UnsubscribeAsync_WhenNotSubscribed_DoesNotThrow()
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{
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var session = new FakeSessionAdapter();
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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await _service.UnsubscribeAsync(new NodeId("ns=2;s=NotSubscribed"));
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// Should not throw
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}
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/// <summary>
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/// Verifies that data subscriptions cannot be created while the client is disconnected.
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/// </summary>
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[Fact]
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public async Task SubscribeAsync_WhenDisconnected_Throws()
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{
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await Should.ThrowAsync<InvalidOperationException>(() =>
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_service.SubscribeAsync(new NodeId("ns=2;s=MyNode")));
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}
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// --- Alarm subscription tests ---
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/// <summary>
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/// Verifies that alarm subscription requests create an event monitored item on the session.
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/// </summary>
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[Fact]
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public async Task SubscribeAlarmsAsync_CreatesEventSubscription()
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{
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var session = new FakeSessionAdapter();
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_sessionFactory.EnqueueSession(session);
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await _service.ConnectAsync(ValidSettings());
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await _service.SubscribeAlarmsAsync();
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session.CreatedSubscriptions.Count.ShouldBe(1);
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session.CreatedSubscriptions[0].AddEventCount.ShouldBe(1);
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}
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/// <summary>
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/// Verifies that duplicate alarm-subscription requests do not create duplicate event subscriptions.
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/// </summary>
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[Fact]
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public async Task SubscribeAlarmsAsync_Duplicate_IsIdempotent()
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{
|
|
var session = new FakeSessionAdapter();
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
await _service.SubscribeAlarmsAsync();
|
|
await _service.SubscribeAlarmsAsync(); // duplicate
|
|
|
|
session.CreatedSubscriptions.Count.ShouldBe(1);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that OPC UA event notifications are mapped into the shared client alarm event model.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task SubscribeAlarmsAsync_RaisesAlarmEvent()
|
|
{
|
|
var fakeSub = new FakeSubscriptionAdapter();
|
|
var session = new FakeSessionAdapter { NextSubscription = fakeSub };
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
AlarmEventArgs? received = null;
|
|
_service.AlarmEvent += (_, e) => received = e;
|
|
|
|
await _service.SubscribeAlarmsAsync();
|
|
|
|
// Simulate alarm event with proper field count
|
|
var handle = fakeSub.ActiveHandles.First();
|
|
var fields = new EventFieldList
|
|
{
|
|
EventFields =
|
|
[
|
|
new Variant(new byte[] { 1, 2, 3 }), // 0: EventId
|
|
new Variant(ObjectTypeIds.AlarmConditionType), // 1: EventType
|
|
new Variant("Source1"), // 2: SourceName
|
|
new Variant(DateTime.UtcNow), // 3: Time
|
|
new Variant(new LocalizedText("High temp")), // 4: Message
|
|
new Variant((ushort)500), // 5: Severity
|
|
new Variant("HighTemp"), // 6: ConditionName
|
|
new Variant(true), // 7: Retain
|
|
new Variant(false), // 8: AckedState
|
|
new Variant(true), // 9: ActiveState
|
|
new Variant(true), // 10: EnabledState
|
|
new Variant(false)
|
|
]
|
|
};
|
|
fakeSub.SimulateEvent(handle, fields);
|
|
|
|
received.ShouldNotBeNull();
|
|
received!.SourceName.ShouldBe("Source1");
|
|
received.ConditionName.ShouldBe("HighTemp");
|
|
received.Severity.ShouldBe((ushort)500);
|
|
received.Message.ShouldBe("High temp");
|
|
received.Retain.ShouldBeTrue();
|
|
received.ActiveState.ShouldBeTrue();
|
|
received.AckedState.ShouldBeFalse();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that removing alarm monitoring deletes the underlying event subscription.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task UnsubscribeAlarmsAsync_DeletesSubscription()
|
|
{
|
|
var fakeSub = new FakeSubscriptionAdapter();
|
|
var session = new FakeSessionAdapter { NextSubscription = fakeSub };
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
await _service.SubscribeAlarmsAsync();
|
|
await _service.UnsubscribeAlarmsAsync();
|
|
|
|
fakeSub.Deleted.ShouldBeTrue();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that removing alarms is safe even when no alarm subscription exists.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task UnsubscribeAlarmsAsync_WhenNoSubscription_DoesNotThrow()
|
|
{
|
|
var session = new FakeSessionAdapter();
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
await _service.UnsubscribeAlarmsAsync(); // Should not throw
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that condition refresh requests are forwarded to the active alarm subscription.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task RequestConditionRefreshAsync_CallsAdapter()
|
|
{
|
|
var fakeSub = new FakeSubscriptionAdapter();
|
|
var session = new FakeSessionAdapter { NextSubscription = fakeSub };
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
await _service.SubscribeAlarmsAsync();
|
|
await _service.RequestConditionRefreshAsync();
|
|
|
|
fakeSub.ConditionRefreshCalled.ShouldBeTrue();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that condition refresh fails fast when no alarm subscription is active.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task RequestConditionRefreshAsync_NoAlarmSubscription_Throws()
|
|
{
|
|
var session = new FakeSessionAdapter();
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
await Should.ThrowAsync<InvalidOperationException>(() =>
|
|
_service.RequestConditionRefreshAsync());
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that alarm subscriptions cannot be created while disconnected.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task SubscribeAlarmsAsync_WhenDisconnected_Throws()
|
|
{
|
|
await Should.ThrowAsync<InvalidOperationException>(() =>
|
|
_service.SubscribeAlarmsAsync());
|
|
}
|
|
|
|
// --- History read tests ---
|
|
|
|
/// <summary>
|
|
/// Verifies that raw history reads return the session-provided values.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task HistoryReadRawAsync_ReturnsValues()
|
|
{
|
|
var expectedValues = new List<DataValue>
|
|
{
|
|
new(new Variant(1.0), StatusCodes.Good),
|
|
new(new Variant(2.0), StatusCodes.Good)
|
|
};
|
|
var session = new FakeSessionAdapter { HistoryReadRawResponse = expectedValues };
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
var results = await _service.HistoryReadRawAsync(
|
|
new NodeId("ns=2;s=Temp"), DateTime.UtcNow.AddHours(-1), DateTime.UtcNow);
|
|
|
|
results.Count.ShouldBe(2);
|
|
session.HistoryReadRawCount.ShouldBe(1);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that raw history reads are rejected while disconnected.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task HistoryReadRawAsync_WhenDisconnected_Throws()
|
|
{
|
|
await Should.ThrowAsync<InvalidOperationException>(() =>
|
|
_service.HistoryReadRawAsync(new NodeId("ns=2;s=Temp"), DateTime.UtcNow.AddHours(-1), DateTime.UtcNow));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that raw-history failures from the session are propagated to callers.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task HistoryReadRawAsync_SessionThrows_PropagatesException()
|
|
{
|
|
var session = new FakeSessionAdapter { ThrowOnHistoryReadRaw = true };
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
await Should.ThrowAsync<ServiceResultException>(() =>
|
|
_service.HistoryReadRawAsync(new NodeId("ns=2;s=Temp"), DateTime.UtcNow.AddHours(-1), DateTime.UtcNow));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that aggregate history reads return the processed values from the session adapter.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task HistoryReadAggregateAsync_ReturnsValues()
|
|
{
|
|
var expectedValues = new List<DataValue>
|
|
{
|
|
new(new Variant(1.5), StatusCodes.Good)
|
|
};
|
|
var session = new FakeSessionAdapter { HistoryReadAggregateResponse = expectedValues };
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
var results = await _service.HistoryReadAggregateAsync(
|
|
new NodeId("ns=2;s=Temp"), DateTime.UtcNow.AddHours(-1), DateTime.UtcNow,
|
|
AggregateType.Average);
|
|
|
|
results.Count.ShouldBe(1);
|
|
session.HistoryReadAggregateCount.ShouldBe(1);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that aggregate history reads are rejected while disconnected.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task HistoryReadAggregateAsync_WhenDisconnected_Throws()
|
|
{
|
|
await Should.ThrowAsync<InvalidOperationException>(() =>
|
|
_service.HistoryReadAggregateAsync(
|
|
new NodeId("ns=2;s=Temp"), DateTime.UtcNow.AddHours(-1), DateTime.UtcNow,
|
|
AggregateType.Average));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that aggregate-history failures from the session are propagated to callers.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task HistoryReadAggregateAsync_SessionThrows_PropagatesException()
|
|
{
|
|
var session = new FakeSessionAdapter { ThrowOnHistoryReadAggregate = true };
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
await Should.ThrowAsync<ServiceResultException>(() =>
|
|
_service.HistoryReadAggregateAsync(
|
|
new NodeId("ns=2;s=Temp"), DateTime.UtcNow.AddHours(-1), DateTime.UtcNow,
|
|
AggregateType.Average));
|
|
}
|
|
|
|
// --- Redundancy tests ---
|
|
|
|
/// <summary>
|
|
/// Verifies that redundancy mode, service level, and server URIs are read from the standard OPC UA redundancy nodes.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task GetRedundancyInfoAsync_ReturnsInfo()
|
|
{
|
|
var session = new FakeSessionAdapter
|
|
{
|
|
ReadResponseFunc = nodeId =>
|
|
{
|
|
if (nodeId == VariableIds.Server_ServerRedundancy_RedundancySupport)
|
|
return new DataValue(new Variant((int)RedundancySupport.Warm), StatusCodes.Good);
|
|
if (nodeId == VariableIds.Server_ServiceLevel)
|
|
return new DataValue(new Variant((byte)200), StatusCodes.Good);
|
|
if (nodeId == VariableIds.Server_ServerRedundancy_ServerUriArray)
|
|
return new DataValue(new Variant(["urn:server1", "urn:server2"]), StatusCodes.Good);
|
|
if (nodeId == VariableIds.Server_ServerArray)
|
|
return new DataValue(new Variant(["urn:server1"]), StatusCodes.Good);
|
|
return new DataValue(StatusCodes.BadNodeIdUnknown);
|
|
}
|
|
};
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
var info = await _service.GetRedundancyInfoAsync();
|
|
|
|
info.Mode.ShouldBe("Warm");
|
|
info.ServiceLevel.ShouldBe((byte)200);
|
|
info.ServerUris.ShouldBe(["urn:server1", "urn:server2"]);
|
|
info.ApplicationUri.ShouldBe("urn:server1");
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that missing optional redundancy arrays do not prevent a redundancy snapshot from being returned.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task GetRedundancyInfoAsync_MissingOptionalArrays_ReturnsGracefully()
|
|
{
|
|
var readCallIndex = 0;
|
|
var session = new FakeSessionAdapter
|
|
{
|
|
ReadResponseFunc = nodeId =>
|
|
{
|
|
if (nodeId == VariableIds.Server_ServerRedundancy_RedundancySupport)
|
|
return new DataValue(new Variant((int)RedundancySupport.None), StatusCodes.Good);
|
|
if (nodeId == VariableIds.Server_ServiceLevel)
|
|
return new DataValue(new Variant((byte)100), StatusCodes.Good);
|
|
// Throw for optional reads
|
|
throw new ServiceResultException(StatusCodes.BadNodeIdUnknown);
|
|
}
|
|
};
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
var info = await _service.GetRedundancyInfoAsync();
|
|
|
|
info.Mode.ShouldBe("None");
|
|
info.ServiceLevel.ShouldBe((byte)100);
|
|
info.ServerUris.ShouldBeEmpty();
|
|
info.ApplicationUri.ShouldBeEmpty();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that redundancy inspection is rejected while disconnected.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task GetRedundancyInfoAsync_WhenDisconnected_Throws()
|
|
{
|
|
await Should.ThrowAsync<InvalidOperationException>(() =>
|
|
_service.GetRedundancyInfoAsync());
|
|
}
|
|
|
|
// --- Failover tests ---
|
|
|
|
/// <summary>
|
|
/// Verifies that a keep-alive failure moves the client to a configured failover endpoint.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task KeepAliveFailure_TriggersFailover()
|
|
{
|
|
var session1 = new FakeSessionAdapter { EndpointUrl = "opc.tcp://primary:4840" };
|
|
var session2 = new FakeSessionAdapter { EndpointUrl = "opc.tcp://backup:4840" };
|
|
_sessionFactory.EnqueueSession(session1);
|
|
_sessionFactory.EnqueueSession(session2);
|
|
|
|
var settings = ValidSettings("opc.tcp://primary:4840");
|
|
settings.FailoverUrls = ["opc.tcp://backup:4840"];
|
|
|
|
var stateChanges = new List<ConnectionStateChangedEventArgs>();
|
|
_service.ConnectionStateChanged += (_, e) => stateChanges.Add(e);
|
|
|
|
await _service.ConnectAsync(settings);
|
|
|
|
// Simulate keep-alive failure
|
|
session1.SimulateKeepAlive(false);
|
|
|
|
// Give async failover time to complete
|
|
await Task.Delay(200);
|
|
|
|
// Should have reconnected
|
|
stateChanges.ShouldContain(e => e.NewState == ConnectionState.Reconnecting);
|
|
stateChanges.ShouldContain(e => e.NewState == ConnectionState.Connected &&
|
|
e.EndpointUrl == "opc.tcp://backup:4840");
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that connection metadata is refreshed to reflect the newly active failover endpoint.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task KeepAliveFailure_UpdatesConnectionInfo()
|
|
{
|
|
var session1 = new FakeSessionAdapter { EndpointUrl = "opc.tcp://primary:4840" };
|
|
var session2 = new FakeSessionAdapter
|
|
{
|
|
EndpointUrl = "opc.tcp://backup:4840",
|
|
ServerName = "BackupServer"
|
|
};
|
|
_sessionFactory.EnqueueSession(session1);
|
|
_sessionFactory.EnqueueSession(session2);
|
|
|
|
var settings = ValidSettings("opc.tcp://primary:4840");
|
|
settings.FailoverUrls = ["opc.tcp://backup:4840"];
|
|
|
|
await _service.ConnectAsync(settings);
|
|
session1.SimulateKeepAlive(false);
|
|
await Task.Delay(200);
|
|
|
|
_service.CurrentConnectionInfo!.EndpointUrl.ShouldBe("opc.tcp://backup:4840");
|
|
_service.CurrentConnectionInfo.ServerName.ShouldBe("BackupServer");
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the client falls back to disconnected when every failover endpoint is unreachable.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task KeepAliveFailure_AllEndpointsFail_TransitionsToDisconnected()
|
|
{
|
|
var session1 = new FakeSessionAdapter();
|
|
_sessionFactory.EnqueueSession(session1);
|
|
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
// After the first session, make factory fail
|
|
_sessionFactory.ThrowOnCreate = true;
|
|
session1.SimulateKeepAlive(false);
|
|
await Task.Delay(200);
|
|
|
|
_service.IsConnected.ShouldBeFalse();
|
|
}
|
|
|
|
// --- Dispose tests ---
|
|
|
|
/// <summary>
|
|
/// Verifies that dispose releases the underlying session and clears exposed connection state.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task Dispose_CleansUpResources()
|
|
{
|
|
var session = new FakeSessionAdapter();
|
|
_sessionFactory.EnqueueSession(session);
|
|
await _service.ConnectAsync(ValidSettings());
|
|
|
|
_service.Dispose();
|
|
|
|
session.Disposed.ShouldBeTrue();
|
|
_service.CurrentConnectionInfo.ShouldBeNull();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that dispose is safe to call even when no connection was established.
|
|
/// </summary>
|
|
[Fact]
|
|
public void Dispose_WhenNotConnected_DoesNotThrow()
|
|
{
|
|
_service.Dispose(); // Should not throw
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that public operations reject use after the shared client has been disposed.
|
|
/// </summary>
|
|
[Fact]
|
|
public async Task OperationsAfterDispose_Throw()
|
|
{
|
|
_service.Dispose();
|
|
|
|
await Should.ThrowAsync<ObjectDisposedException>(() =>
|
|
_service.ConnectAsync(ValidSettings()));
|
|
await Should.ThrowAsync<ObjectDisposedException>(() =>
|
|
_service.ReadValueAsync(new NodeId("ns=2;s=X")));
|
|
}
|
|
|
|
// --- Factory tests ---
|
|
|
|
/// <summary>
|
|
/// Verifies that the factory creates a usable shared OPC UA client service instance.
|
|
/// </summary>
|
|
[Fact]
|
|
public void OpcUaClientServiceFactory_CreatesService()
|
|
{
|
|
var factory = new OpcUaClientServiceFactory();
|
|
var service = factory.Create();
|
|
service.ShouldNotBeNull();
|
|
service.ShouldBeAssignableTo<IOpcUaClientService>();
|
|
service.Dispose();
|
|
}
|
|
}
|