// test offset only gets applied once
  public void testWrapOnce() throws IOException {
    String filename = TestAll.cdmUnitTestDir + "ncml/coords/testCoordScaling.ncml";
    System.out.printf("%s%n", filename);
    NetcdfDataset ncd = ucar.nc2.dataset.NetcdfDataset.openDataset(filename);
    Variable v = ncd.findCoordinateAxis("Longitude");
    assert v != null;
    assert v instanceof CoordinateAxis1D;

    // if offset is applied twice, the result is not in +-180 range
    Array data = v.read();
    NCdumpW.printArray(data);
    IndexIterator ii = data.getIndexIterator();
    while (ii.hasNext()) {
      assert Math.abs(ii.getDoubleNext()) < 180 : ii.getDoubleCurrent();
    }
  }
  public void testAggCoordVar3(NetcdfFile ncfile) throws IOException {
    Variable time = ncfile.findVariable("time");
    assert null != time;
    assert time.getShortName().equals("time");
    assert time.getRank() == 1 : time.getRank();
    assert time.getShape()[0] == 3;
    assert time.getDataType() == DataType.DOUBLE : time.getDataType();

    assert time.getDimension(0) == ncfile.findDimension("time");

    Array data = time.read();

    assert (data instanceof ArrayDouble);
    IndexIterator dataI = data.getIndexIterator();
    double val = dataI.getDoubleNext();
    assert Misc.closeEnough(val, 0.0) : val;
    assert Misc.closeEnough(dataI.getDoubleNext(), 10.0) : dataI.getDoubleCurrent();
    assert Misc.closeEnough(dataI.getDoubleNext(), 99.0) : dataI.getDoubleCurrent();
  }