assertEquals(1, pool.failCounts.get("10.0.0.2"));
    }

    @ParameterizedTest
    @ValueSource(ints = { 0, -1 })
    @DisplayName("Should default to port 445 when port <= 0")
    void testDefaultPort(int invalidPort) throws Exception {
        // Given: Create a new pool for this test to ensure isolation
        SmbTransportPoolImpl testPool = new SmbTransportPoolImpl();