Unit testing update (#199)

CryptoExchange.Net/Testing/Implementations/TestRequest.cs

@@ -0,0 +1,50 @@
+using CryptoExchange.Net.Interfaces;
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace CryptoExchange.Net.Testing.Implementations
+{
+    internal class TestRequest : IRequest
+    {
+        private readonly TestResponse _response;
+
+        public string Accept { set { } }
+
+        public string? Content { get; private set; }
+
+        public HttpMethod Method { get; set; }
+
+        public Uri Uri { get; set; }
+
+        public int RequestId { get; set; }
+
+#pragma warning disable CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
+        public TestRequest(TestResponse response)
+#pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
+        {
+            _response = response;
+        }
+
+        public void AddHeader(string key, string value)
+        {
+        }
+
+        public Dictionary<string, IEnumerable<string>> GetHeaders() => new();
+
+        public Task<IResponse> GetResponseAsync(CancellationToken cancellationToken) => Task.FromResult<IResponse>(_response);
+
+        public void SetContent(byte[] data)
+        {
+            Content = Encoding.UTF8.GetString(data);
+        }
+
+        public void SetContent(string data, string contentType)
+        {
+            Content = data;
+        }
+    }
+}