void testIsResponseAsyncFalse() {
            testRequest.setAsyncId(0);
            assertFalse(testRequest.isResponseAsync());
        }

        @Test
        @DisplayName("isResponseAsync should return true when asyncId is not 0")
        void testIsResponseAsyncTrue() {
            testRequest.setAsyncId(12345L);
            assertTrue(testRequest.isResponseAsync());
        }

        return this.asyncId;
    }

    /**
     * Sets the asynchronous identifier for this message.
     *
     * @param asyncId
     *            the asyncId to set
     */
    public final void setAsyncId(final long asyncId) {
        this.asyncId = asyncId;
    }

    /**
     * Gets the credit count for this message.
     *
     * @return the credit
     */
    public final int getCredit() {

        }

        @Test
        @DisplayName("Should get and set async ID")
        void testAsyncIdProperty() {
            assertEquals(0, testMessage.getAsyncId());
            testMessage.setAsyncId(67890L);
            assertEquals(67890L, testMessage.getAsyncId());
        }

        @Test
        @DisplayName("Should get and set credit")
        void testCreditProperty() {