Imported Upstream version 6.10.0.76

Former-commit-id: 7f253ed035f518a4ffbc5ce16f84e5a63ffcd26e

mcs/class/System.Net.Http/Test/System.Net.Http/HttpClientHandlerTests.Android.cs

@@ -0,0 +1,77 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Text;
+using System.Net.Http;
+using System.Reflection;
+
+using NUnit.Framework;
+
+namespace System.Net.Http.Tests
+{
+	[TestFixture]
+	public class HttpClientHandlerTestsAndroid
+	{
+		static Type GetInnerHandlerType (HttpClient httpClient)
+		{
+			BindingFlags bflasgs = BindingFlags.Instance | BindingFlags.NonPublic;
+			FieldInfo handlerField = typeof (HttpMessageInvoker).GetField("_handler", bflasgs);
+			Assert.IsNotNull (handlerField);
+			object handler = handlerField.GetValue (httpClient);
+			FieldInfo innerHandlerField = handler.GetType ().GetField ("_delegatingHandler", bflasgs);
+			Assert.IsNotNull (handlerField);
+			object innerHandler = innerHandlerField.GetValue (handler);
+			return innerHandler.GetType ();
+		}
+
+		[Test]
+		public void TestEnvVarSwitchForInnerHttpHandler ()
+		{
+#if !MONODROID
+			return;
+#endif
+			const string xaHandlerKey = "XA_HTTP_CLIENT_HANDLER_TYPE";
+			var prevHandler = Environment.GetEnvironmentVariable (xaHandlerKey);
+
+			// ""
+			Environment.SetEnvironmentVariable (xaHandlerKey, "");
+			var httpClient1 = new HttpClient ();
+			Assert.AreEqual ("SocketsHttpHandler", GetInnerHandlerType (httpClient1).Name);
+
+			var handler2 = new HttpClientHandler ();
+			var httpClient2 = new HttpClient (handler2);
+			Assert.AreEqual ("SocketsHttpHandler", GetInnerHandlerType (httpClient2).Name);
+
+			// "System.Net.Http.MonoWebRequestHandler"
+			Environment.SetEnvironmentVariable (xaHandlerKey, "System.Net.Http.MonoWebRequestHandler");
+			var httpClient3 = new HttpClient ();
+			Assert.AreEqual ("MonoWebRequestHandler", GetInnerHandlerType (httpClient3).Name);
+
+			var handler4 = new HttpClientHandler ();
+			var httpClient4 = new HttpClient (handler4);
+			Assert.AreEqual ("MonoWebRequestHandler", GetInnerHandlerType (httpClient4).Name);
+
+			// "System.Net.Http.MonoWebRequestHandler, System.Net.Http"
+			Environment.SetEnvironmentVariable (xaHandlerKey, "System.Net.Http.MonoWebRequestHandler, System.Net.Http");
+			var httpClient5 = new HttpClient ();
+			Assert.AreEqual ("MonoWebRequestHandler", GetInnerHandlerType (httpClient5).Name);
+
+			var handler6 = new HttpClientHandler ();
+			var httpClient6 = new HttpClient (handler6);
+			Assert.AreEqual ("MonoWebRequestHandler", GetInnerHandlerType (httpClient6).Name);
+
+			// "System.Net.Http.HttpClientHandler"
+			Environment.SetEnvironmentVariable (xaHandlerKey, "System.Net.Http.HttpClientHandler");
+			var httpClient7 = new HttpClient ();
+			Assert.AreEqual ("SocketsHttpHandler", GetInnerHandlerType (httpClient7).Name);
+
+			var handler8 = new HttpClientHandler ();
+			var httpClient8 = new HttpClient (handler8);
+			Assert.AreEqual ("SocketsHttpHandler", GetInnerHandlerType (httpClient8).Name);
+
+			Environment.SetEnvironmentVariable (xaHandlerKey, prevHandler);
+		}
+	}
+}