test(fetching): Request for an empty set should return an empty set

Issue #21 - 1

Author: jaredcnance

test/JsonApiDotNetCoreExampleTests/Acceptance/Spec/FetchingDataTests.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Http;
+using System.Threading.Tasks;
+using DotNetCoreDocs;
+using DotNetCoreDocs.Writers;
+using JsonApiDotNetCore.Serialization;
+using JsonApiDotNetCore.Services;
+using JsonApiDotNetCoreExample;
+using JsonApiDotNetCoreExample.Data;
+using JsonApiDotNetCoreExample.Models;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.TestHost;
+using Newtonsoft.Json;
+using Xunit;
+
+namespace JsonApiDotNetCoreExampleTests.Acceptance.Spec
+{
+    [Collection("WebHostCollection")]
+    public class FetchingDataTests
+    {
+        private DocsFixture<Startup, JsonDocWriter> _fixture;
+        private IJsonApiContext _jsonApiContext;
+
+        public FetchingDataTests(DocsFixture<Startup, JsonDocWriter> fixture)
+        {
+            _fixture = fixture;
+            _jsonApiContext = fixture.GetService<IJsonApiContext>();
+        }
+
+        [Fact]
+        public async Task Request_ForEmptyCollection_Returns_EmptyDataCollection()
+        {
+            // arrange
+            var context = _fixture.GetService<AppDbContext>();
+            context.TodoItems.RemoveRange(context.TodoItems);
+            await context.SaveChangesAsync();
+
+            var builder = new WebHostBuilder()
+                .UseStartup<Startup>();
+            var httpMethod = new HttpMethod("GET");
+            var route = "/api/v1/todo-items";
+            var server = new TestServer(builder);
+            var client = server.CreateClient();
+            var request = new HttpRequestMessage(httpMethod, route);
+            var expectedBody = JsonConvert.SerializeObject(new {
+                data = new List<object>()
+            });
+
+            // act
+            var response = await client.SendAsync(request);
+            var body = await response.Content.ReadAsStringAsync();
+            var deserializedBody = JsonApiDeSerializer.DeserializeList<TodoItem>(body, _jsonApiContext);
+
+            // assert
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+            Assert.Equal("application/vnd.api+json", response.Content.Headers.ContentType.ToString());
+            Assert.Empty(deserializedBody);
+            Assert.Equal(expectedBody, body);
+
+            context.Dispose();
+        }
+    }
+}