Merge branch 'master' of github.com:elastic/elasticsearch-net

Author: Mpdreamz

src/Nest/Aggregations/Metric/ExtendedStats/ExtendedStatsAggregation.cs

@@ -4,19 +4,31 @@ namespace Nest
 {
 	[JsonObject(MemberSerialization = MemberSerialization.OptIn)]
 	[ContractJsonConverter(typeof(AggregationJsonConverter<ExtendedStatsAggregation>))]
-	public interface IExtendedStatsAggregation : IMetricAggregation { }
+	public interface IExtendedStatsAggregation : IMetricAggregation
+	{
+		[JsonProperty("sigma")]
+		double Sigma { get; set; }
+	}
 
 	public class ExtendedStatsAggregation : MetricAggregationBase, IExtendedStatsAggregation
 	{
 		internal ExtendedStatsAggregation() { }
 
 		public ExtendedStatsAggregation(string name, Field field) : base(name, field) { }
 
+		public double Sigma { get; set; }
+
 		internal override void WrapInContainer(AggregationContainer c) => c.ExtendedStats = this;
 	}
 
-	public class ExtendedStatsAggregationDescriptor<T> 
+	public class ExtendedStatsAggregationDescriptor<T>
 		: MetricAggregationDescriptorBase<ExtendedStatsAggregationDescriptor<T>, IExtendedStatsAggregation, T>
-			, IExtendedStatsAggregation 
-		where T : class { }
-}
+			, IExtendedStatsAggregation
+		where T : class
+	{
+		double IExtendedStatsAggregation.Sigma { get; set; }
+
+		public ExtendedStatsAggregationDescriptor<T> Sigma(double sigma) =>
+			Assign(a => a.Sigma = sigma);
+	}
+}

src/Tests/Aggregations/Metric/ExtendedStats/ExtendedStatsAggregationUsageTests.cs

@@ -21,7 +21,8 @@ public ExtendedStatsAggregationUsageTests(ReadOnlyCluster i, EndpointUsage usage
 				{
 					extended_stats = new
 					{
-						field = "numberOfCommits"
+						field = "numberOfCommits",
+						sigma = 1d
 					}
 				}
 			}
@@ -31,13 +32,14 @@ public ExtendedStatsAggregationUsageTests(ReadOnlyCluster i, EndpointUsage usage
 			.Aggregations(a => a
 				.ExtendedStats("commit_stats", es => es
 					.Field(p => p.NumberOfCommits)
+					.Sigma(1)
 				)
 			);
 
 		protected override SearchRequest<Project> Initializer =>
 			new SearchRequest<Project>
 			{
-				Aggregations = new ExtendedStatsAggregation("commit_stats", Field<Project>(p => p.NumberOfCommits))
+				Aggregations = new ExtendedStatsAggregation("commit_stats", Field<Project>(p => p.NumberOfCommits)) {  Sigma = 1 }
 			};
 
 		protected override void ExpectResponse(ISearchResponse<Project> response)