### Question:
Ch3BandReader extends PlainBandReader { boolean createFillValueLine(int frameIndicator) { return MetopReader.isChannel3a(frameIndicator) ^ channel == AvhrrConstants.CH_3A; } Ch3BandReader(int channel, AvhrrFile metopFile, ImageInputStream inputStream); @Override void readBandRasterData(int sourceOffsetX, int sourceOffsetY, int sourceWidth, int sourceHeight, int sourceStepX, int sourceStepY, ProductData destBuffer, ProgressMonitor pm);  }### Answer:
@Test public void testCreateFillValueLine() { final int ch3a_flag = 1; final int ch3b_flag = 0; assertTrue(readerCh_3A.createFillValueLine(ch3b_flag)); assertFalse(readerCh_3A.createFillValueLine(ch3a_flag)); assertTrue(readerCh_3B.createFillValueLine(ch3a_flag)); assertFalse(readerCh_3B.createFillValueLine(ch3b_flag)); }