Added filter test method for OperationService

opp/jdbc-repo-impl/src/main/java/JDBCRepository.java

@@ -326,11 +326,16 @@ class JDBCRepository implements Repository
    * Adds each found Operation to the list.
    * @param filter the filter
    * @return the matching entries
+   * TODO Ask how to remove "Optional[]" from filter.date()
    */
   @Override
   public List<Operation> findOperations(Operation.Filter filter) {
 
-    var sql = "SELECT * FROM operations WHERE date = " + filter.date() + ";";
+    var sql = "SELECT * FROM operations WHERE date = " +
+            sqlValue(filter.date()).
+                    replace("Optional", "").
+                    replace("[", "").
+                    replace("]", "") + ";";
 
     try (
             var resultSet =

opp/jdbc-repo-impl/src/test/java/Tests.java

@@ -106,4 +106,14 @@ public final class Tests
 
     System.out.println(operation);
   }
+
+  @Test
+  public void testGetOperations() {
+    Operation.Filter filter = new Operation.Filter(Optional.of(LocalDate.of(2024, 05, 24)));
+
+    List<Operation> operations = opService.getOperations(filter);
+
+    for (Operation operation : operations)
+      System.out.println(operation);
+  }
 }