Adding test case for inner hits fix

Signed-off-by: Ankit Jain <[email protected]>

rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/400_inner_hits.yml

@@ -0,0 +1,65 @@
+setup:
+  - do:
+      indices.create:
+        index: test_1
+        body:
+          settings:
+            number_of_replicas: 0
+          mappings:
+            properties:
+              list_id:
+                type: integer
+              names:
+                type: nested
+                properties:
+                  full_name:
+                    type: text
+
+  - do:
+      bulk:
+        refresh: true
+        body:
+          - index:
+              _index: test_1
+              _id:    1
+          - list_id: 1
+            names:
+              - full_name: John Doe
+              - full_name: John Micheal Doe
+          - index:
+              _index: test_1
+              _id:    2
+          - list_id: 2
+            names:
+              - full_name: Jane Doe
+              - full_name: Jane Michelle Doe
+
+---
+"Include inner hits in top hits":
+  - do:
+      search:
+        rest_total_hits_as_int: true
+        body:
+          query:
+            nested:
+              path: names
+              query:
+                match:
+                  names.full_name: Doe
+              inner_hits: { }
+          size: 0
+          aggs:
+            lists:
+              terms:
+                field: list_id
+              aggs:
+                top_result:
+                  top_hits:
+                    size: 10
+
+  - length: { hits.hits: 0 }
+  - length: { aggregations.lists.buckets: 2 }
+  - length: { aggregations.lists.buckets.0.top_result.hits.hits: 1 }
+  - length: { aggregations.lists.buckets.0.top_result.hits.hits.0.inner_hits.names.hits.hits: 2 }
+  - length: { aggregations.lists.buckets.1.top_result.hits.hits: 1 }
+  - length: { aggregations.lists.buckets.1.top_result.hits.hits.0.inner_hits.names.hits.hits: 2 }