code: def test_values_interleave_non_unique_cols(self):
      df = DataFrame(
          [[Timestamp("20130101"), 3.5], [Timestamp("20130102"), 4.5]],
          columns=["x", "x"],
          index=[1, 2],
      )
  
      df_unique = df.copy()
      df_unique.columns = ["x", "y"]
      assert df_unique.values.shape == df.values.shape
      tm.assert_numpy_array_equal(df_unique.values[0], df.values[0])
      tm.assert_numpy_array_equal(df_unique.values[1], df.values[1])
  
file_path: pandas/pandas/tests/frame/methods/test_values.py
imports: import numpy
  import pytest
  from pandas import DataFrame, NaT, Series, Timestamp, date_range, period_range
  import pandas._testing
label_desc: Use image node_id 9 for calling the TestDataFrameValues obj's underlying member method code with example usage: obj.test_values_interleave_non_unique_cols() without return types