Adding Tests and Refactoring

Functional Tests for RazorPages added

tests/FunctionalTests/WebRazorPages/HomePageOnGet.cs

@@ -0,0 +1,29 @@
+using Microsoft.eShopWeb.RazorPages;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace FunctionalTests.WebRazorPages
+{
+    public class HomePageOnGet : IClassFixture<CustomWebRazorPagesApplicationFactory<Startup>>
+    {
+        public HomePageOnGet(CustomWebRazorPagesApplicationFactory<Startup> factory)
+        {
+            Client = factory.CreateClient();
+        }
+
+        public HttpClient Client { get; }
+
+        [Fact]
+        public async Task ReturnsHomePageWithProductListing()
+        {
+            // Arrange & Act
+            var response = await Client.GetAsync("/");
+            response.EnsureSuccessStatusCode();
+            var stringResponse = await response.Content.ReadAsStringAsync();
+
+            // Assert
+            Assert.Contains(".NET Bot Black Sweatshirt", stringResponse);
+        }
+    }
+}