}

    @Nested
    @DisplayName("Constructor invalid inputs")
    class ConstructorInvalidInputs {
        @Test
        @DisplayName("Null handle triggers NullPointerException")
        void ctor_nullHandle_throwsNPE() {
            // Act + Assert
            assertThrows(NullPointerException.class, () -> new SmbPipeOutputStream(null, tree));
        }

        @Test