void testHashCodeConsistency() {
            assertEquals(data1.hashCode(), data2.hashCode());
        }

        @Test
        @DisplayName("Should not be equal to null")
        void testNotEqualToNull() {
            assertNotEquals(data1, null);
        }

        @Test
        @DisplayName("Should not be equal to different type")
        void testNotEqualToDifferentType() {