DATAMONGO-909 - Compound index on inherited class should be created correctly.

With the overhaul of the index creation done in DATAMONGO-899 the CompoundIndex annotation is not longer just looked up at the concrete type but rather all its interfaces and super classes. So we just added an additional test to verify this behaviour.

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/core/index/MongoPersistentEntityIndexResolverUnitTests.java

@@ -295,10 +295,29 @@ public class MongoPersistentEntityIndexResolverUnitTests {
 			assertThat(indexDefinition.getIndexKeys(), equalTo(new BasicDBObjectBuilder().add("foo", 1).add("bar", -1).get()));
 		}
 
+		/**
+		 * @see DATAMONGO-909
+		 */
+		@Test
+		public void compoundIndexOnSuperClassResolvedCorrectly() {
+
+			List<IndexDefinitionHolder> indexDefinitions = prepareMappingContextAndResolveIndexForType(IndexDefinedOnSuperClass.class);
+
+			IndexDefinition indexDefinition = indexDefinitions.get(0).getIndexDefinition();
+			assertThat(indexDefinition.getIndexOptions(),
+					equalTo(new BasicDBObjectBuilder().add("name", "compound_index").add("unique", true).add("dropDups", true)
+							.add("sparse", true).add("background", true).add("expireAfterSeconds", 10L).get()));
+			assertThat(indexDefinition.getIndexKeys(), equalTo(new BasicDBObjectBuilder().add("foo", 1).add("bar", -1).get()));
+		}
+
 		@Document(collection = "CompoundIndexOnLevelZero")
 		@CompoundIndexes({ @CompoundIndex(name = "compound_index", def = "{'foo': 1, 'bar': -1}", background = true,
 				dropDups = true, expireAfterSeconds = 10, sparse = true, unique = true) })
 		static class CompoundIndexOnLevelZero {}
+
+		static class IndexDefinedOnSuperClass extends CompoundIndexOnLevelZero {
+
+		}
 	}
 
 	public static class MixedIndexResolutionTests {