Added unit test for TryGetBasicAuthCredentials extension method and minor code tidy.

src/Umbraco.Tests.UnitTests/Umbraco.Web.Common/Extensions/HttpContextExtensionTests.cs

@@ -0,0 +1,42 @@
+// Copyright (c) Umbraco.
+// See LICENSE for more details.
+
+using System;
+using System.Text;
+using Microsoft.AspNetCore.Http;
+using NUnit.Framework;
+using Umbraco.Extensions;
+
+namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Web.Common.Extensions
+{
+    [TestFixture]
+    public class HttpContextExtensionTests
+    {
+        [Test]
+        public void TryGetBasicAuthCredentials_WithoutHeader_ReturnsFalse()
+        {
+            var httpContext = new DefaultHttpContext();
+
+            var result = httpContext.TryGetBasicAuthCredentials(out string _, out string _);
+
+            Assert.IsFalse(result);
+        }
+
+        [Test]
+        public void TryGetBasicAuthCredentials_WithHeader_ReturnsTrueWithCredentials()
+        {
+            const string Username = "fred";
+            const string Password = "test";
+
+            var httpContext = new DefaultHttpContext();
+            var credentials = Convert.ToBase64String(Encoding.ASCII.GetBytes($"{Username}:{Password}"));
+            httpContext.Request.Headers.Add("Authorization", $"Basic {credentials}");
+
+            bool result = httpContext.TryGetBasicAuthCredentials(out string username, out string password);
+
+            Assert.IsTrue(result);
+            Assert.AreEqual(Username, username);
+            Assert.AreEqual(Password, password);
+        }
+    }
+}