Adding functional tests (#197)

* Working on login tests

* Testing login with an integration test

Working on login functional test.

* Got functional login test working

tests/FunctionalTests/Web/Controllers/AccountControllerSignIn.cs

@@ -0,0 +1,60 @@
+using Microsoft.AspNetCore.Mvc.Testing;
+using Microsoft.eShopWeb.Web;
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace Microsoft.eShopWeb.FunctionalTests.Web.Controllers
+{
+    public class AccountControllerSignIn : IClassFixture<CustomWebApplicationFactory<Startup>>
+    {
+        public AccountControllerSignIn(CustomWebApplicationFactory<Startup> factory)
+        {
+            Client = factory.CreateClient(new WebApplicationFactoryClientOptions
+            {
+                AllowAutoRedirect = false
+            });
+        }
+
+        public HttpClient Client { get; }
+
+        [Fact]
+        public async Task ReturnsSignInScreenOnGet()
+        {
+            var response = await Client.GetAsync("/account/sign-in");
+            response.EnsureSuccessStatusCode();
+            var stringResponse = await response.Content.ReadAsStringAsync();
+
+            Assert.Contains("demouser@microsoft.com", stringResponse);
+        }
+
+        // TODO: Finish this test.
+        [Fact]
+        public async Task ReturnsSuccessfulSignInOnPostWithValidCredentials()
+        {
+            //var response = await Client.GetAsync("/account/sign-in");
+            //response.EnsureSuccessStatusCode();
+            //var stringResponse = await response.Content.ReadAsStringAsync();
+            // TODO: Get the token from a Get call
+            // Ref: https://buildmeasurelearn.wordpress.com/2016/11/23/handling-asp-net-mvcs-anti-forgery-tokens-when-load-testing-with-jmeter/
+
+
+            var keyValues = new List<KeyValuePair<string, string>>();
+            keyValues.Add(new KeyValuePair<string, string>("Email", "demouser@microsoft.com"));
+            keyValues.Add(new KeyValuePair<string, string>("Password", "Pass@word1"));
+
+            keyValues.Add(new KeyValuePair<string, string>("__RequestVerificationToken", "CfDJ8Obhlq65OzlDkoBvsSX0tgyXhgITd4pD1OocDNYfbIeOkBMVLl3SmcZjyHLFqAlfvNOcWnV73G520010NOL1VaHRODGXZxTNjkIOjOi36YW3Fs5Bb9K9baf0hLFrmFI4P1w-64FURukDzaWRGl0Tzw0"));
+            var formContent = new FormUrlEncodedContent(keyValues);
+
+            var response = await Client.PostAsync("/account/sign-in", formContent);
+            //response.EnsureSuccessStatusCode();
+            var stringResponse = await response.Content.ReadAsStringAsync();
+
+            Assert.Equal(HttpStatusCode.Redirect, response.StatusCode);
+            Assert.Equal(new System.Uri("/", UriKind.Relative), response.Headers.Location);
+        }
+    }
+}