code: def test_default(self, df):
      orient = "x"
      groupby = self.get_groupby(df, orient)
      res = Jitter()(df, groupby, orient, {})
      self.check_same(res, df, "y", "grp2", "width")
      self.check_pos(res, df, "x", 0.2 * df["width"])
      assert (res["x"] - df["x"]).abs().min() > 0
  
imports: from itertools import product
  import numpy
  import pandas
  from pandas.testing import assert_series_equal
  from numpy.testing import assert_array_equal, assert_array_almost_equal
  from seaborn._core.moves import Dodge, Jitter, Shift, Stack, Norm
  from seaborn._core.rules import categorical_order
  from seaborn._core.groupby import GroupBy
  import pytest
label_desc: Use image node_id 4 for calling the TestJitter obj's underlying member method code with example usage: obj.test_default(df) without return types