code: def test_viewer_update_list(self):
      table = Table({"a": [1, 2, 3]})
      viewer = PerspectiveViewer()
      viewer.load(table)
      viewer.update([{"a": 4}, {"a": 5}, {"a": 6}])
      assert table.size() == 6
      assert viewer.table.size() == 6
      assert viewer.table.view().to_dict() == {"a": [1, 2, 3, 4, 5, 6]}
  
imports: import numpy
  import pandas
  from perspective import PerspectiveViewer, Table
label_desc: Use image node_id 15 for calling the TestViewer obj's underlying member method code with example usage: obj.test_viewer_update_list() without return types