Adding functional tests using WebApplicationFactory

tests/FunctionalTests/Web/Controllers/CatalogControllerIndex.cs

@@ -0,0 +1,70 @@
+using Infrastructure.Data;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.eShopWeb;
+using System.Linq;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Xunit;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using Infrastructure.Identity;
+using Microsoft.AspNetCore.Identity;
+using System;
+
+namespace FunctionalTests.Web.Controllers
+{
+public class CatalogControllerIndex : IClassFixture<WebApplicationFactory<Startup>>
+{
+public CatalogControllerIndex(WebApplicationFactory<Startup> fixture)
+{
+    var factory = fixture.Factories.FirstOrDefault() ?? fixture.WithWebHostBuilder(ConfigureWebHostBuilder);
+    Client = factory.CreateClient();
+    var host = factory.Server?.Host;
+    SeedData(host);
+}
+
+private void SeedData(IWebHost host)
+{
+    if(host == null) { throw new ArgumentNullException("host"); }
+    using (var scope = host.Services.CreateScope())
+    {
+        var services = scope.ServiceProvider;
+        var loggerFactory = services.GetRequiredService<ILoggerFactory>();
+        try
+        {
+            var catalogContext = services.GetRequiredService<CatalogContext>();
+            CatalogContextSeed.SeedAsync(catalogContext, loggerFactory)
+    .Wait();
+
+            var userManager = services.GetRequiredService<UserManager<ApplicationUser>>();
+            AppIdentityDbContextSeed.SeedAsync(userManager).Wait();
+        }
+        catch (Exception ex)
+        {
+            var logger = loggerFactory.CreateLogger<CatalogControllerIndex>();
+            logger.LogError(ex, "An error occurred seeding the DB.");
+        }
+    }
+}
+
+private static void ConfigureWebHostBuilder(IWebHostBuilder builder)
+{
+    builder.UseEnvironment("Testing");
+}
+
+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);
+        }
+    }
+}