return new SmbRandomAccessFile(file, mode, SmbConstants.DEFAULT_SHARING, unshared);
    }

    @Test
    @DisplayName("Constructor: invalid mode throws IllegalArgumentException")
    void constructor_invalidMode_throws() {
        SmbFile file = mock(SmbFile.class);
        assertThrows(IllegalArgumentException.class, () -> new SmbRandomAccessFile(file, "badmode"));
    }

    @Test