@Test public void testMapEntryEquality() { BankParticipantCodeStructure entry = new BankParticipantCodeStructure("1", "2"); BankParticipantCodeStructure entry2 = new BankParticipantCodeStructure("1", "2"); BankParticipantCodeStructure entry3 = new BankParticipantCodeStructure("2", "3"); assertEquals(entry, entry2); assertFalse(entry.equals(entry3)); Set<BankParticipantCodeStructure> set = new HashSet<>(); set.add(entry); set.add(entry2); set.add(entry3); assertEquals(2, set.size()); }