ds.SetDescription("RasterAttributeTable");
if (!ds.GetDescription().equals("RasterAttributeTable"))
throw new RuntimeException();
ds.SetMetadataItem("key", "value");
if (!ds.GetMetadataItem("key").equals("value"))
throw new RuntimeException();
Vector v = ds.GetMetadata_List();
if (!((String)v.elementAt(0)).equals("key=value"))