add acceptance test for deeply nested inclusions

Author: jaredcnance

test/JsonApiDotNetCoreExampleTests/Acceptance/Spec/DeeplyNestedInclusionTests.cs

@@ -0,0 +1,57 @@
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Bogus;
+using JsonApiDotNetCoreExample;
+using JsonApiDotNetCoreExample.Data;
+using JsonApiDotNetCoreExample.Models;
+using Microsoft.AspNetCore.Hosting;
+using Newtonsoft.Json;
+using Xunit;
+using Person = JsonApiDotNetCoreExample.Models.Person;
+
+namespace JsonApiDotNetCoreExampleTests.Acceptance.Spec
+{
+    [Collection("WebHostCollection")]
+    public class DeeplyNestedInclusionTests
+    {
+        private TestFixture<TestStartup> _fixture;
+
+        public DeeplyNestedInclusionTests(TestFixture<TestStartup> fixture)
+        {
+            _fixture = fixture;
+        }
+
+        [Fact]
+        public async Task Can_Include_Nested_Relationships()
+        {
+            // arrange
+            const string route = "/api/v1/todo-items?include=collection.owner";
+
+            var todoItem = new TodoItem {
+                Collection = new TodoItemCollection {
+                    Owner = new Person()
+                }
+            };
+        
+            var context = _fixture.GetService<AppDbContext>();
+            context.TodoItems.RemoveRange(context.TodoItems);
+            context.TodoItems.Add(todoItem);
+            await context.SaveChangesAsync();
+
+            // act
+            var response = await _fixture.Client.GetAsync(route);
+
+            // assert
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+
+            var body = await response.Content.ReadAsStringAsync();
+            var todoItems = _fixture.DeSerializer.DeserializeList<TodoItem>(body);
+
+            var responseTodoItem = Assert.Single(todoItems);
+            Assert.NotNull(responseTodoItem);
+            Assert.NotNull(responseTodoItem.Collection);
+            Assert.NotNull(responseTodoItem.Collection.Owner);
+        }
+    }
+}