comply to 1.99.7 index operations reponses (#56)

* comply to 1.99.7 index operations reponses

* comply to 1.99.7 index create and delete response

Author: DvirDukhan

src/main/java/com/redislabs/redisgraph/Statistics.java

@@ -8,7 +8,8 @@ public interface Statistics {
 	 */
 	enum Label{
 		LABELS_ADDED("Labels added"),
-		INDICES_ADDED("Indices added"),
+		INDICES_ADDED("Indices created"),
+		INDICES_DELETED("Indices deleted"),
 		NODES_CREATED("Nodes created"),
 		NODES_DELETED("Nodes deleted"),
 		RELATIONSHIPS_DELETED("Relationships deleted"),
@@ -54,6 +55,8 @@ public static Label getEnum(String value) {
 	int nodesDeleted();
 
 	int indicesAdded();
+
+	int indicesDeleted();
 
 	int labelsAdded();
 

src/main/java/com/redislabs/redisgraph/impl/resultset/StatisticsImpl.java

@@ -93,6 +93,9 @@ public int indicesAdded() {
    }
 
 
+	@Override
+	public int indicesDeleted() {return getIntValue(Label.INDICES_DELETED);}
+
 	/**
 	 *
 	 * @return number of labels added after query execution

src/test/java/com/redislabs/redisgraph/RedisGraphAPITest.java

@@ -15,7 +15,6 @@
 import org.junit.*;
 
 import com.redislabs.redisgraph.Statistics.Label;
-import org.junit.rules.ExpectedException;
 
 import static com.redislabs.redisgraph.Header.ResultSetColumnTypes.*;
 
@@ -157,6 +156,16 @@ public void testIndex() {
         Assert.assertNotNull(createNonExistingIndexResult.getStatistics().getStringValue(Label.INDICES_ADDED));
         Assert.assertEquals(1, createNonExistingIndexResult.getStatistics().indicesAdded());
 
+        ResultSet createExistingIndexResult = api.query("social", "CREATE INDEX ON :person(age)");
+        Assert.assertFalse(createExistingIndexResult.hasNext());
+        Assert.assertNotNull(createExistingIndexResult.getStatistics().getStringValue(Label.INDICES_ADDED));
+        Assert.assertEquals(0, createExistingIndexResult.getStatistics().indicesAdded());
+
+        ResultSet deleteExistingIndexResult = api.query("social", "DROP INDEX ON :person(age)");
+        Assert.assertFalse(deleteExistingIndexResult.hasNext());
+        Assert.assertNotNull(deleteExistingIndexResult.getStatistics().getStringValue(Label.INDICES_DELETED));
+        Assert.assertEquals(1, deleteExistingIndexResult.getStatistics().indicesDeleted());
+
     }
 
     @Test