void testCreditChargeProperty() {
            assertEquals(0, testMessage.getCreditCharge());
        }

        @Test
        @DisplayName("Should get and set read size")
        void testReadSizeProperty() {
            testMessage.setReadSize(1024);
            // No getter for readSize, but it's used internally in decode
        }

        @Test
        @DisplayName("Should check if async")