Test serialization via REST test

Author: original-brownbear

rest-api-spec/src/main/resources/rest-api-spec/test/indices.stats/10_index.yml

@@ -47,7 +47,9 @@ setup:
   - match: { _shards.total: 18 }
   - is_true: _all
   - is_true: indices.test1
+  - is_true: indices.test1.uuid
   - is_true: indices.test2
+  - is_true: indices.test2.uuid
 
 
 ---

server/src/test/java/org/elasticsearch/action/admin/indices/stats/IndicesStatsTests.java

@@ -27,16 +27,12 @@
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
-import org.elasticsearch.common.xcontent.XContentParser;
-import org.elasticsearch.common.xcontent.json.JsonXContent;
 import org.elasticsearch.index.engine.CommitStats;
 import org.elasticsearch.index.engine.SegmentsStats;
 import org.elasticsearch.index.translog.Translog;
 import org.elasticsearch.test.ESSingleNodeTestCase;
 
-import java.io.IOException;
 import java.util.List;
-import java.util.Map;
 import java.util.concurrent.TimeUnit;
 
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
@@ -158,15 +154,10 @@ public void testRefreshListeners() throws Exception {
     }
 
     @SuppressWarnings("unchecked")
-    public void testUuidOnRootStatsIndices() throws IOException {
+    public void testUuidOnRootStatsIndices() {
         String uuid = createIndex("test").indexUUID();
         IndicesStatsResponse rsp = client().admin().indices().prepareStats().get();
-        try (XContentParser parser = createParser(JsonXContent.jsonXContent, rsp.toString())) {
-            assertEquals(
-                uuid,
-                ((Map<String, Object>)((Map<String,Object>) parser.map().get("indices")).get("test")).get("uuid")
-            );
-        }
+        assertEquals(uuid, rsp.getIndex("test").getUuid());
     }
 
     /**