Added a new test for the fetch strategies

Author: johelvisguzman

test/DotNetToolkit.Repository.Test/Data/TestEntity.cs

@@ -0,0 +1,26 @@
+namespace DotNetToolkit.Repository.Test.Data
+{
+    public class Customer
+    {
+        public int Id { get; set; }
+        public string Name { get; set; }
+        public CustomerAddress Address { get; set; }
+        public CustomerPhone Phone { get; set; }
+    }
+
+    public class CustomerPhone
+    {
+        public int Id { get; set; }
+        public string PhoneNumber { get; set; }
+        public Customer Customer { get; set; }
+    }
+
+    public class CustomerAddress
+    {
+        public int Id { get; set; }
+        public string Street { get; set; }
+        public string City { get; set; }
+        public string State { get; set; }
+        public Customer Customer { get; set; }
+    }
+}

test/DotNetToolkit.Repository.Test/FetchStrategyTests.cs

@@ -0,0 +1,35 @@
+namespace DotNetToolkit.Repository.Test
+{
+    using Data;
+    using FetchStrategies;
+    using Xunit;
+
+    public class FetchStrategyTests
+    {
+        [Fact]
+        public void Include()
+        {
+            var strategy = new FetchStrategy<Customer>()
+                .Include(x => x.Address)
+                .Include(x => x.Phone)
+                .Include(x => x.Phone.Customer);
+
+            Assert.Contains("Address", strategy.IncludePaths);
+            Assert.Contains("Phone", strategy.IncludePaths);
+            Assert.Contains("Phone.Customer", strategy.IncludePaths);
+        }
+
+        [Fact]
+        public void Include_Property_Names()
+        {
+            var strategy = new FetchStrategy<Customer>()
+                .Include("Address")
+                .Include("Phone")
+                .Include("Phone.Customer");
+
+            Assert.Contains("Address", strategy.IncludePaths);
+            Assert.Contains("Phone", strategy.IncludePaths);
+            Assert.Contains("Phone.Customer", strategy.IncludePaths);
+        }
+    }
+}