Make testing name scheme consistent (#395)

* Updating CahceHelperTests names

* Updating OrdersTests names

* Removing tests for "Include" functionality as it lives in a NuGet Package now

* Updating Integration Test anems

tests/UnitTests/MediatorHandlers/OrdersTests/GetOrderDetails.cs

@@ -0,0 +1,51 @@
+using Ardalis.Specification;
+using Microsoft.eShopWeb.ApplicationCore.Entities.OrderAggregate;
+using Microsoft.eShopWeb.ApplicationCore.Interfaces;
+using Microsoft.eShopWeb.Web.Features.OrderDetails;
+using Moq;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace Microsoft.eShopWeb.UnitTests.MediatorHandlers.OrdersTests
+{
+    public class GetOrderDetails
+    {
+        private readonly Mock<IOrderRepository> _mockOrderRepository;
+
+        public GetOrderDetails()
+        {
+            var item = new OrderItem(new CatalogItemOrdered(1, "ProductName", "URI"), 10.00m, 10);
+            var address = new Address(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>(), It.IsAny<string>());
+            Order order = new Order("buyerId", address, new List<OrderItem> { item });
+
+            _mockOrderRepository = new Mock<IOrderRepository>();
+            _mockOrderRepository.Setup(x => x.ListAsync(It.IsAny<ISpecification<Order>>())).ReturnsAsync(new List<Order> { order });
+        }
+
+        [Fact]
+        public async Task NotBeNullIfOrderExists()
+        {
+            var request = new eShopWeb.Web.Features.OrderDetails.GetOrderDetails("SomeUserName", 0);
+
+            var handler = new GetOrderDetailsHandler(_mockOrderRepository.Object);
+
+            var result = await handler.Handle(request, CancellationToken.None);
+
+            Assert.NotNull(result);
+        }
+
+        [Fact]
+        public async Task BeNullIfOrderNotFound()
+        {
+            var request = new eShopWeb.Web.Features.OrderDetails.GetOrderDetails("SomeUserName", 100);
+
+            var handler = new GetOrderDetailsHandler(_mockOrderRepository.Object);
+
+            var result = await handler.Handle(request, CancellationToken.None);
+
+            Assert.Null(result);
+        }
+    }
+}