Fix ElasticSearch Fetch of List Property Values

diff --git a/nuxeo-features/nuxeo-elasticsearch/nuxeo-elasticsearch-core/src/test/java/org/nuxeo/elasticsearch/test/nxql/TestCompareCoreWithES.java b/nuxeo-features/nuxeo-elasticsearch
/nuxeo-elasticsearch-core/src/test/java/org/nuxeo/elasticsearch/test/nxql/TestCompareCoreWithES.java                                                                                    
index 1ff2360..42636a5 100644                                                                                                                                                           
--- a/nuxeo-features/nuxeo-elasticsearch/nuxeo-elasticsearch-core/src/test/java/org/nuxeo/elasticsearch/test/nxql/TestCompareCoreWithES.java
+++ b/nuxeo-features/nuxeo-elasticsearch/nuxeo-elasticsearch-core/src/test/java/org/nuxeo/elasticsearch/test/nxql/TestCompareCoreWithES.java
@@ -22,6 +22,7 @@ import java.util.concurrent.TimeUnit;
 
 import javax.inject.Inject;
 
+import org.apache.commons.lang.ArrayUtils;
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
@@ -77,6 +78,8 @@ public class TestCompareCoreWithES {
             doc.setPropertyValue("dc:title", "File" + i);
             doc.setPropertyValue("dc:nature", "Nature" + i);
             doc.setPropertyValue("dc:rights", "Rights" + i % 2);
+            doc.setPropertyValue("dc:subjects",
+                    (i % 2 == 0) ? new String[] {"Subjects1"} : new String[] {"Subjects1", "Subjects2"});
             doc = session.createDocument(doc);
         }
         for (int i = 5; i < 10; i++) {
@@ -135,6 +138,9 @@ public class TestCompareCoreWithES {
                 nameOrTitle = doc.getTitle();
             }
             sb.append(nameOrTitle);
+            sb.append("[" + doc.getPropertyValue("dc:nature") + "]");
+            sb.append("[" + doc.getPropertyValue("dc:rights") + "]");
+            sb.append("[" + ArrayUtils.toString(doc.getPropertyValue("dc:subjects")) + "]");
             sb.append(",");
         }
         return sb.toString();
@@ -153,16 +159,22 @@ public class TestCompareCoreWithES {
     protected void compareESAndCore(String nxql) throws Exception {
 
         DocumentModelList coreResult = session.query(nxql);
-        DocumentModelList esResult = ess.query(new NxQueryBuilder(session).nxql(nxql).limit(20));
-        try {
-            assertSameDocumentLists(coreResult, esResult);
-        } catch (AssertionError e) {
-            System.out.println("Error while executing " + nxql);
-            System.out.println("Core result : ");
-            dump(coreResult);
-            System.out.println("elasticsearch result : ");
-            dump(esResult);
-            throw e;
+        NxQueryBuilder nxQueryBuilder = new NxQueryBuilder(session).nxql(nxql).limit(20);
+        for (int i = 0; i < 2; i++) {
+            if (i == 1) {
+                nxQueryBuilder = nxQueryBuilder.fetchFromElasticsearch();
+            }
+            DocumentModelList esResult = ess.query(nxQueryBuilder);
+            try {
+                assertSameDocumentLists(coreResult, esResult);
+            } catch (AssertionError e) {
+                System.out.println("Error while executing " + nxql);
+                System.out.println("Core result : ");
+                dump(coreResult);
+                System.out.println("elasticsearch result : ");
+                dump(esResult);
+                throw e;
+            }
         }
     }