Add test demonstrating equals with address

src/Services/Ordering/Ordering.UnitTests/Domain/AddressTest.cs

@@ -0,0 +1,30 @@
+using Microsoft.eShopOnContainers.Services.Ordering.Domain.AggregatesModel.OrderAggregate;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Xunit;
+
+namespace Ordering.UnitTests.Domain
+{
+    public class AddressTest
+    {
+        [Fact]
+        public void equal_addresses_should_be_equal()
+        {
+            // Arrange
+            var left = CreateValidAddress();
+            var right = CreateValidAddress();
+
+            // Act and Assert
+            Assert.Equal(left, right);
+            Assert.True(left == right);
+        }
+
+        private Address CreateValidAddress() => new Address(
+                street: "FakeStreet",
+                city: "FakeCity",
+                state: "FakeState",
+                country: "FakeCountry",
+                zipcode: "FakeZipCode");
+    }
+}