Showcase what happens in #1528 when no default index is set

Author: Mpdreamz

src/Tests/Nest.Tests.Unit/Nest.Tests.Unit.csproj

@@ -410,13 +410,17 @@
     <Compile Include="QueryParsers\Visitor\DslPrettyPrintVisitor.cs" />
     <Compile Include="QueryParsers\Visitor\VisitorDemoUseCase.cs" />
     <Compile Include="QueryParsers\Visitor\VisitorTests.cs" />
+    <None Include="Reproduce\Issue1528.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Include="Reproduce\Issue1464.json">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
     <Compile Include="Reproduce\Reproduce1396Tests.cs" />
     <Compile Include="Reproduce\Reproduce1199Tests.cs" />
     <Compile Include="Reproduce\Reproduce1146Tests.cs" />
     <Compile Include="Reproduce\Reproduce1440Tests.cs" />
+    <Compile Include="Reproduce\Reproduce1528Tests.cs" />
     <Compile Include="Reproduce\Reproduce1464Tests.cs" />
     <Compile Include="Reproduce\Reproduce629Tests.cs" />
     <Compile Include="Reproduce\Reproduce1187Tests.cs" />

src/Tests/Nest.Tests.Unit/Reproduce/Issue1528.json

@@ -0,0 +1,10 @@
+{ "index" :  {"_index":"default-index", "_type":"mytype","_id":"my_id_0"} }
+{"name":"my_id_0"}
+{ "index" :  {"_index":"default-index", "_type":"mytype","_id":"my_id_1"} }
+{"name":"my_id_1"}
+{ "index" :  {"_index":"default-index", "_type":"mytype","_id":"my_id_2"} }
+{"name":"my_id_2"}
+{ "index" :  {"_index":"default-index", "_type":"mytype","_id":"my_id_3"} }
+{"name":"my_id_3"}
+{ "index" :  {"_index":"default-index", "_type":"mytype","_id":"my_id_4"} }
+{"name":"my_id_4"}

src/Tests/Nest.Tests.Unit/Reproduce/Reproduce1528Tests.cs

@@ -0,0 +1,62 @@
+using Elasticsearch.Net;
+using Newtonsoft.Json;
+using NUnit.Framework;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using System.Threading.Tasks;
+using Elasticsearch.Net.Connection;
+
+namespace Nest.Tests.Unit.Reproduce
+{
+	[TestFixture]
+	public class Reproduce1528Tests : BaseJsonTests
+	{
+		[ElasticType(Name ="mytype", IdProperty ="Name")]
+		public class MyClass
+		{
+			public string Name { get; set; }
+		}
+
+
+		[Test]
+		public void Issue1528()
+		{
+			var settings = new ConnectionSettings(defaultIndex: "default-index");
+			var client = new ElasticClient(settings, new InMemoryConnection(settings));
+			var descriptor = new BulkDescriptor();
+
+			foreach (var i in Enumerable.Range(0, 5))
+			{
+				descriptor.Index<MyClass>(op => op
+					.Document(new MyClass { Name = "my_id_" + i })
+				);
+			}
+			var result = client.Bulk(descriptor);
+			var jsonRequest = result.ConnectionStatus.Request;
+			this.BulkJsonEquals(jsonRequest.Utf8String(), MethodBase.GetCurrentMethod());
+		}
+
+		[Test]
+		public void Issue1528_NoDefaultIndex()
+		{
+			var settings = new ConnectionSettings();
+			var client = new ElasticClient(settings, new InMemoryConnection(settings));
+			var descriptor = new BulkDescriptor();
+
+			foreach (var i in Enumerable.Range(0, 5))
+			{
+				descriptor.Index<MyClass>(op => op
+					.Document(new MyClass { Name = "my_id_" + i })
+				);
+			}
+			Assert.Throws<NullReferenceException>(()=>{
+				client.Bulk(descriptor);
+			});
+		}
+
+	}
+}