Use Razor component in StandaloneApp sample

samples/StandaloneApp/Home.cshtml

@@ -0,0 +1 @@
+Hello, world!

samples/StandaloneApp/Index.cshtml

@@ -1,2 +0,0 @@
-<h1>Hello, world!</h1>
-Hello from the Razor component.

samples/StandaloneApp/Program.cs

@@ -2,8 +2,6 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using Microsoft.Blazor.Browser.Rendering;
-using Microsoft.Blazor.Components;
-using Microsoft.Blazor.RenderTree;
 
 namespace StandaloneApp
 {
@@ -12,15 +10,7 @@ namespace StandaloneApp
         public static void Main(string[] args)
         {
             new BrowserRenderer()
-                .AddComponent("app", new PlaceholderComponent());
-        }
-
-        private class PlaceholderComponent : IComponent
-        {
-            public void BuildRenderTree(RenderTreeBuilder builder)
-            {
-                builder.AddText("Hello from the placeholder component.");
-            }
+                .AddComponent("app", new Home());
         }
     }
 }

src/Microsoft.Blazor.Build/Core/RazorCompilation/RazorCompiler.cs

@@ -90,6 +90,11 @@ namespace Microsoft.Blazor.Build.Core.RazorCompilation
                     ? baseNamespace
                     : $"{baseNamespace}.{itemNamespace}";
 
+                // TODO: Pass through info about whether this is a design-time build, and if so,
+                // just emit enough of a stub class that intellisense will show the correct type
+                // name and any public members. Don't need to actually emit all the RenderTreeBuilder
+                // invocations.
+
                 var engine = new BlazorRazorEngine();
 
                 var sourceDoc = RazorSourceDocument.ReadFrom(inputFileContents, inputFilePath);

test/Microsoft.Blazor.E2ETest/Tests/StandaloneAppTest.cs

@@ -3,6 +3,9 @@
 
 using Microsoft.Blazor.E2ETest.Infrastructure;
 using Microsoft.Blazor.E2ETest.Infrastructure.ServerFixtures;
+using OpenQA.Selenium;
+using OpenQA.Selenium.Support.UI;
+using System;
 using Xunit;
 
 namespace Microsoft.Blazor.E2ETest.Tests
@@ -13,13 +16,27 @@ namespace Microsoft.Blazor.E2ETest.Tests
         public StandaloneAppTest(BrowserFixture browserFixture, DevHostServerFixture<StandaloneApp.Program> serverFixture)
             : base(browserFixture, serverFixture)
         {
+            Navigate("/", noReload: true);
+            WaitUntilLoaded();
         }
 
         [Fact]
         public void HasTitle()
         {
-            Navigate("/");
             Assert.Equal("Blazor standalone", Browser.Title);
         }
+
+        [Fact]
+        public void HasBodyText()
+        {
+            var bodyText = Browser.FindElement(By.TagName("body")).Text;
+            Assert.Equal("Hello, world!", bodyText);
+        }
+
+        private void WaitUntilLoaded()
+        {
+            new WebDriverWait(Browser, TimeSpan.FromSeconds(30)).Until(
+                driver => driver.FindElement(By.TagName("app")).Text != "Loading...");
+        }
     }
 }