Add logging to test and retries to test http client

test/dotnet-serve.Tests/DotNetServe.cs

@@ -39,6 +39,10 @@ private DotNetServe(Process process, int port, ITestOutputHelper output)
 
         public void Start()
         {
+            if (_output != null)
+            {
+                _output.WriteLine($"Starting: {_process.StartInfo.FileName} {_process.StartInfo.Arguments}");
+            }
             _process.Start();
             _process.BeginOutputReadLine();
             _process.BeginErrorReadLine();

test/dotnet-serve.Tests/HttpClientExtensions.cs

@@ -0,0 +1,37 @@
+// Copyright (c) Nate McMaster.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using McMaster.Extensions.CommandLineUtils;
+using Xunit.Abstractions;
+
+namespace McMaster.DotNet.Serve.Tests
+{
+    static class HttpClientExtensions
+    {
+        public static async Task<string> GetStringWithRetriesAsync(this HttpClient client, string uri, int retries = 5)
+        {
+            while (retries > 0)
+            {
+                retries--;
+                try
+                {
+                    return await client.GetStringAsync(uri);
+                }
+                catch
+                {
+                    await Task.Delay(TimeSpan.FromMilliseconds(100));
+                }
+            }
+
+            throw new TimeoutException("Failed to connect to " + uri);
+        }
+    }
+}
+

test/dotnet-serve.Tests/RazorTests.cs

@@ -26,7 +26,7 @@ public async Task ItCanLoadSimpleRazorPage()
                     output: _output,
                     enableRazor: true))
             {
-                var result = await serve.Client.GetStringAsync("/");
+                var result = await serve.Client.GetStringWithRetriesAsync("/", retries: 5);
                 Assert.Contains("<li>Item 2</li>", result);
             }
         }