assertEquals(-1, Config.getInt(testProperties, "test.invalid.int"));
    }

    @Test
    @DisplayName("Should get long property with default value")
    void testGetLongWithDefault() {
        assertEquals(1234567890123L, Config.getLong(testProperties, "test.long", 0L));
        assertEquals(987654321L, Config.getLong(testProperties, "nonexistent.long", 987654321L));
    }

    @Test