@Test
public void testDetermineSourceOffsets() throws IOException, URISyntaxException {

    final File f1_BT_io_file = getSecondNcFile("F1_BT_io.nc");
    final NetcdfFile f1_BT_io_netcdfFile = NetcdfFileOpener.open(f1_BT_io_file);
    assertNotNull(f1_BT_io_netcdfFile);
    final Variable f1_BT_io_variable = f1_BT_io_netcdfFile.getVariables().get(0);
    assertArrayEquals(new int[]{0}, NcFileStitcher.determineSourceOffsets(1800000, f1_BT_io_variable));
    final File met_tx_file = getFirstNcFile("met_tx.nc");
    final NetcdfFile met_tx_netcdfFile = NetcdfFileOpener.open(met_tx_file);
    assertNotNull(met_tx_netcdfFile);
    final Variable u_wind_tx_variable = met_tx_netcdfFile.getVariables().get(11);
    assertArrayEquals(new int[]{0, 260000, 520000, 780000, 1040000},
                      NcFileStitcher.determineSourceOffsets(260000, u_wind_tx_variable));
}