assertEquals(beforeRelease - 1, transport.getUsageCount());
        }

        @Test
        @DisplayName("release should throw exception when usage count would go negative")
        void shouldThrowOnNegativeUsage() {
            transport.release(); // Make it 0
            assertThrows(RuntimeCIFSException.class, transport::release);
        }

        @Test
        @DisplayName("close should call release")