static void doOne(
      String dir, String filename, int ngrids, int ncoordSys, int ncoordAxes, int nVertCooordAxes)
      throws Exception {
    System.out.println("test read GridDataset = " + dir + filename);
    ucar.nc2.dt.grid.GridDataset gridDs = GridDataset.open(dir + filename);

    int countGrids = gridDs.getGrids().size();
    int countCoordAxes = gridDs.getNetcdfDataset().getCoordinateAxes().size();
    int countCoordSys = gridDs.getNetcdfDataset().getCoordinateSystems().size();

    // count vertical axes
    int countVertCooordAxes = 0;
    List axes = gridDs.getNetcdfDataset().getCoordinateAxes();
    for (int i = 0; i < axes.size(); i++) {
      CoordinateAxis axis = (CoordinateAxis) axes.get(i);
      AxisType t = axis.getAxisType();
      if ((t == AxisType.GeoZ) || (t == AxisType.Height) || (t == AxisType.Pressure))
        countVertCooordAxes++;
    }

    Iterator iter = gridDs.getGridsets().iterator();
    while (iter.hasNext()) {
      GridDataset.Gridset gridset = (GridDataset.Gridset) iter.next();
      GridCoordSys gcs = gridset.getGeoCoordSys();
      // if (gcs.hasTimeAxis())
      //  System.out.println(" "+gcs.isDate()+" "+gcs.getName());
    }

    if (showCount) {
      System.out.println(" grids=" + countGrids + ((ngrids < 0) ? " *" : ""));
      System.out.println(" coordSys=" + countCoordSys + ((ncoordSys < 0) ? " *" : ""));
      System.out.println(" coordAxes=" + countCoordAxes + ((ncoordAxes < 0) ? " *" : ""));
      System.out.println(" vertAxes=" + countVertCooordAxes + ((nVertCooordAxes < 0) ? " *" : ""));
    }

    if (ngrids >= 0) assert ngrids == countGrids : "Grids " + ngrids + " != " + countGrids;
    // if (ncoordSys >= 0)
    //  assert ncoordSys == countCoordSys : "CoordSys " + ncoordSys + " != " + countCoordSys;
    // if (ncoordAxes >= 0)
    //  assert ncoordAxes == countCoordAxes : "CoordAxes " + ncoordAxes + " != " + countCoordAxes;
    if (nVertCooordAxes >= 0)
      assert nVertCooordAxes == countVertCooordAxes
          : "VertAxes " + nVertCooordAxes + " != " + countVertCooordAxes;

    gridDs.close();
  }