64 lines
2.5 KiB
C#
64 lines
2.5 KiB
C#
using System;
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using System.Collections.Generic;
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using ArchestrA;
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using ZB.MOM.WW.LmxOpcUa.Historian.Aveva;
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using ZB.MOM.WW.LmxOpcUa.Host.Configuration;
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namespace ZB.MOM.WW.LmxOpcUa.Historian.Aveva.Tests
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{
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/// <summary>
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/// Fake Historian connection factory for tests. Controls whether connections
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/// succeed, fail, or timeout without requiring the real Historian SDK runtime.
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/// </summary>
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internal sealed class FakeHistorianConnectionFactory : IHistorianConnectionFactory
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{
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/// <summary>
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/// Exception thrown on every CreateAndConnect call unless a more specific rule in
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/// <see cref="ServerBehaviors"/> or <see cref="OnConnect"/> fires first.
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/// </summary>
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public Exception? ConnectException { get; set; }
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public int ConnectCallCount { get; private set; }
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public Action<int>? OnConnect { get; set; }
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/// <summary>
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/// Per-server-name override: if the requested <c>config.ServerName</c> has an entry
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/// whose value is non-null, that exception is thrown instead of the global
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/// <see cref="ConnectException"/>. Lets tests script cluster failover behavior like
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/// "node A always fails; node B always succeeds".
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/// </summary>
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public Dictionary<string, Exception?> ServerBehaviors { get; } =
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new Dictionary<string, Exception?>(StringComparer.OrdinalIgnoreCase);
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/// <summary>
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/// Ordered history of server names passed to CreateAndConnect so tests can assert the
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/// picker's iteration order and failover sequence.
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/// </summary>
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public List<string> ConnectHistory { get; } = new List<string>();
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public HistorianAccess CreateAndConnect(HistorianConfiguration config, HistorianConnectionType type)
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{
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ConnectCallCount++;
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ConnectHistory.Add(config.ServerName);
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if (ServerBehaviors.TryGetValue(config.ServerName, out var serverException) && serverException != null)
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throw serverException;
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if (OnConnect != null)
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{
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OnConnect(ConnectCallCount);
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}
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else if (ConnectException != null)
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{
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throw ConnectException;
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}
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// Return a HistorianAccess that is not actually connected.
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// ReadRawAsync etc. will fail when they try to use it, which exercises
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// the HandleConnectionError → reconnect path.
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return new HistorianAccess();
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}
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}
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}
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