code: def test_unit(self, data, locs):
      unit = cat.UnitData(data)
      assert list(unit._mapping.keys()) == data
      assert list(unit._mapping.values()) == locs
  
imports: import warnings
  import pytest
  import numpy
  import matplotlib
  from matplotlib.axes import Axes
  import matplotlib.pyplot
  import matplotlib.category
  from matplotlib.testing.decorators import check_figures_equal
label_desc: Use image node_id 1 for calling the TestUnitData obj's underlying member method code with example usage: obj.test_unit(data, locs) without return types