@Test
void testUnsupportedUnsignedFixedPointLengthThrows() {

	FixedPoint invalidDataType = mockFixedPoint(false, 11); // 11 byte data is not supported
       HdfFileChannel hdfFc = mock(HdfFileChannel.class);
       assertThrows(HdfTypeException.class, () -> invalidDataType.fillData(longBuffer, dims, hdfFc));
       verifyNoInteractions(hdfFc);
}