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test/LinkMobility.Tests/Helpers/HttpMessageHandlerMock.cs

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+using System.Linq;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using Moq.Protected;
+
+namespace LinkMobility.Tests.Helpers
+{
+	internal class HttpMessageHandlerMock
+	{
+		public HttpMessageHandlerMock()
+		{
+			Mock = new();
+
+			Mock.Protected()
+				.Setup<Task<HttpResponseMessage>>("SendAsync", ItExpr.IsAny<HttpRequestMessage>(), ItExpr.IsAny<CancellationToken>())
+				.Callback<HttpRequestMessage, CancellationToken>(async (request, cancellationToken) =>
+				{
+					var callback = new HttpRequestMessageCallback
+					{
+						HttpMethod = request.Method,
+						Url = request.RequestUri.ToString(),
+						Headers = request.Headers.ToDictionary(h => h.Key, h => string.Join(", ", h.Value))
+					};
+
+					if (request.Content != null)
+					{
+						callback.ContentRaw = await request.Content.ReadAsByteArrayAsync(cancellationToken);
+						callback.Content = await request.Content.ReadAsStringAsync(cancellationToken);
+					}
+
+					RequestCallbacks.Add(callback);
+				})
+				.ReturnsAsync(Responses.Dequeue);
+		}
+
+		public List<HttpRequestMessageCallback> RequestCallbacks { get; } = [];
+
+		public Queue<HttpResponseMessage> Responses { get; } = new();
+
+		public Mock<HttpClientHandler> Mock { get; }
+	}
+
+	internal class HttpRequestMessageCallback
+	{
+		public HttpMethod HttpMethod { get; set; }
+
+		public string Url { get; set; }
+
+		public Dictionary<string, string> Headers { get; set; }
+
+		public byte[] ContentRaw { get; set; }
+
+		public string Content { get; set; }
+	}
+}