code: def test_widget_client_replace(self, rename_libraries):
      import perspective
  
      assert perspective.is_libpsp() is False
      data = {"a": np.arange(0, 50)}
      new_data = {"a": [1]}
      widget = perspective.PerspectiveWidget(data)
      mocked_post = partial(
          mock_post, assert_msg={"cmd": "replace", "data": new_data}
      )
      widget.post = MethodType(mocked_post, widget)
      widget.replace(new_data)
      assert widget._data is new_data
  
imports: import os
  import pytest
  import sys
  import numpy
  import pandas
  from datetime import date, datetime
  from functools import partial
  from types import MethodType
label_desc: Use image node_id 22 for calling the TestClient obj's underlying member method code with example usage: obj.test_widget_client_replace(rename_libraries) without return types