Adding Tests and Refactoring

Functional Tests for RazorPages added

tests/UnitTests/ApplicationCore/Entities/BasketTests/AddItem.cs

@@ -5,7 +5,7 @@ using Xunit;
 
 namespace UnitTests.ApplicationCore.Entities.BasketTests
 {
-    public class AddItem
+    public class Total
     {
         private int _testCatalogItemId = 123;
         private decimal _testUnitPrice = 1.23m;

tests/UnitTests/ApplicationCore/Entities/OrderTests/Total.cs

@@ -0,0 +1,41 @@
+using ApplicationCore.Entities.OrderAggregate;
+using System.Collections.Generic;
+using UnitTests.Builders;
+using Xunit;
+
+namespace UnitTests.ApplicationCore.Entities.OrderTests
+{
+    public class Total
+    {
+        private decimal _testUnitPrice = 42m;
+
+        [Fact]
+        public void IsZeroForNewOrder()
+        {
+            var order = new OrderBuilder().WithNoItems();
+
+            Assert.Equal(0, order.Total());
+        }
+
+        [Fact]
+        public void IsCorrectGiven1Item()
+        {
+            var builder = new OrderBuilder();
+            var items = new List<OrderItem>
+            {
+                new OrderItem(builder.TestCatalogItemOrdered, _testUnitPrice, 1)
+            };
+            var order = new OrderBuilder().WithItems(items);
+            Assert.Equal(_testUnitPrice, order.Total());
+        }
+
+        [Fact]
+        public void IsCorrectGiven3Items()
+        {
+            var builder = new OrderBuilder();
+            var order = builder.WithDefaultValues();
+
+            Assert.Equal(builder.TestUnitPrice * builder.TestUnits, order.Total());
+        }
+    }
+}

tests/UnitTests/Builders/OrderBuilder.cs

@@ -1,7 +1,5 @@
 using ApplicationCore.Entities.OrderAggregate;
-using System;
 using System.Collections.Generic;
-using System.Text;
 
 namespace UnitTests.Builders
 {
@@ -34,5 +32,17 @@ namespace UnitTests.Builders
             _order = new Order(TestBuyerId, new AddressBuilder().WithDefaultValues(), itemList);
             return _order;
         }
+
+        public Order WithNoItems()
+        {
+            _order = new Order(TestBuyerId, new AddressBuilder().WithDefaultValues(), new List<OrderItem>());
+            return _order;
+        }
+
+        public Order WithItems(List<OrderItem> items)
+        {
+            _order = new Order(TestBuyerId, new AddressBuilder().WithDefaultValues(), items);
+            return _order;
+        }
     }
 }