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BrokerApiTest/Helper/TestLogger.cs

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+namespace BrokerTest.Helper;
+
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+
+using Xunit.Abstractions;
+
+public class TestLogger<T> : ILogger<T>, IDisposable
+{
+	private readonly List<string> m_logs = [];
+	private readonly ITestOutputHelper m_output;
+
+	public TestLogger(ITestOutputHelper output)
+	{
+		m_output = output;
+	}
+
+	public IDisposable? BeginScope<TState>(TState state) where TState : notnull
+	{
+		return null;
+	}
+
+	public bool IsEnabled(LogLevel logLevel) => true;
+
+	public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception,
+		Func<TState, Exception?, string> formatter)
+	{
+		var message = formatter(state, exception);
+		m_logs.Add(message);
+		m_output.WriteLine(message);
+	}
+
+	public IEnumerable<string> Logs => m_logs;
+
+	public void Dispose() => m_logs.Clear();
+}