fix overal bg_count now gets returned for sig_terms

Author: Mpdreamz

src/Nest/Aggregations/AggregateJsonConverter.cs

@@ -33,6 +33,7 @@ private static class Parser
 			public const string DocCountErrorUpperBound = "doc_count_error_upper_bound";
 			public const string Count = "count";
 			public const string DocCount = "doc_count";
+			public const string BgCount = "bg_count";
 			public const string Bounds = "bounds";
 			public const string Hits = "hits";
 			public const string Location = "location";
@@ -301,11 +302,20 @@ private IAggregate GetSingleBucketAggregate(JsonReader reader, JsonSerializer se
 			var docCount = (reader.Value as long?).GetValueOrDefault(0);
 			var bucket = new SingleBucketAggregate {DocCount = docCount};
 			reader.Read();
+			long? bgCount = null;
+			if ((string)reader.Value == Parser.BgCount)
+			{
+				reader.Read();
+				bgCount = (reader.Value as long?).GetValueOrDefault(0);
+				reader.Read();
+
+			}
 			if (reader.TokenType == JsonToken.PropertyName && (string) reader.Value == Parser.Buckets)
 			{
 				var b = this.GetMultiBucketAggregate(reader, serializer) as BucketAggregate;
 				return new BucketAggregate
 				{
+					BgCount = bgCount,
 					DocCount = docCount,
 					Items = b.Items
 				};

src/Nest/Aggregations/AggregationsHelper.cs

@@ -112,6 +112,7 @@ public SignificantTermsAggregate SignificantTerms(string key)
 				? null
 				: new SignificantTermsAggregate
 				{
+					BgCount = bucket.BgCount,
 					DocCount = bucket.DocCount,
 					Buckets = bucket.Items.OfType<SignificantTermsBucket>().ToList(),
 					Meta = bucket.Meta

src/Nest/Aggregations/Bucket/BucketAggregate.cs

@@ -36,5 +36,6 @@ public class BucketAggregate : IAggregate
 		public long? SumOtherDocCount { get; set; }
 		public IReadOnlyDictionary<string, object> Meta { get; set; } = EmptyReadOnly<string, object>.Dictionary;
 		public long DocCount { get; set; }
+		public long? BgCount { get; set; }
 	}
 }

src/Nest/Aggregations/Bucket/SignificantTerms/SignificantTermsAggregate.cs

@@ -11,5 +11,6 @@ public SignificantTermsAggregate() { }
 		public SignificantTermsAggregate(IDictionary<string, IAggregate> aggregations) : base(aggregations) { }
 
 		public long DocCount { get; set; }
+		public long? BgCount { get; set; }
 	}
 }

src/Tests/Aggregations/Bucket/Sampler/SamplerAggregationUsageTests.cs

@@ -69,6 +69,8 @@ protected override void ExpectResponse(ISearchResponse<Project> response)
 			sample.Should().NotBeNull();
 			var sigTags = sample.SignificantTerms("significant_names");
 			sigTags.Should().NotBeNull();
+			sigTags.BgCount.Should().BeGreaterThan(0);
+			sigTags.DocCount.Should().BeGreaterThan(0);
 		}
 	}
 }

src/Tests/tests.default.yaml

@@ -5,7 +5,7 @@
 # tracked by git).
 
 # mode either u (unit test), i (integration test) or m (mixed mode)
-mode: u
+mode: i
 # the elasticsearch version that should be started
 # Can be a snapshot version of sonatype or "latest" to get the latest snapshot of sonatype
 elasticsearch_version: 5.5.0