Игнорировать регистр букв

src/main/java/kinosearch/kinosearch3/base/MongoDBRepository.java

@@ -25,7 +25,7 @@ public class MongoDBRepository implements BaseRepository {
     public List<CinemaDocument> findByTitle(String title) {
         Query query = new Query();
         final String regex = String.format(".*%s.*", Pattern.quote(title));
-        query.addCriteria(Criteria.where("title").regex(regex));
+        query.addCriteria(Criteria.where("title").regex(regex, "i"));
         logger.debug("query: {}", query.toString());
         return mongoOperations.find(query, CinemaDocument.class);
     }