Unit Tests for hot spots (#1454)

* Add TaxInfoTests

* Add UserTests

* Add SendServicTests

* Added IconFetchingServicesTests

* Add endline

test/Icons.Test/Services/IconFetchingServiceTests.cs

@@ -0,0 +1,53 @@
+using System.Threading.Tasks;
+using Bit.Icons.Services;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
+using Xunit;
+
+namespace Bit.Icons.Test.Services
+{
+    public class IconFetchingServiceTests
+    {
+        [Theory]
+        [InlineData("www.google.com")] // https site
+        [InlineData("neverssl.com")] // http site
+        [InlineData("ameritrade.com")]
+        [InlineData("icloud.com")]
+        [InlineData("bofa.com")]
+        public async Task GetIconAsync_Success(string domain)
+        {
+            var sut = new IconFetchingService(GetLogger());
+            var result = await sut.GetIconAsync(domain);
+
+            Assert.NotNull(result);
+            Assert.NotNull(result.Icon);
+        }
+
+        [Theory]
+        [InlineData("1.1.1.1")]
+        [InlineData("")]
+        [InlineData("localhost")]
+        public async Task GetIconAsync_ReturnsNull(string domain)
+        {
+            var sut = new IconFetchingService(GetLogger());
+            var result = await sut.GetIconAsync(domain);
+
+            Assert.Null(result);
+        }
+
+        private static ILogger<IconFetchingService> GetLogger()
+        {
+            var services = new ServiceCollection();
+            services.AddLogging(b =>
+            {
+                b.ClearProviders();
+                b.AddDebug();
+            });
+
+            var provider = services.BuildServiceProvider();
+
+            return provider.GetRequiredService<ILogger<IconFetchingService>>();
+        }
+    }
+}