class_docstr: Based on the pandas conversion and factorization tests:
  
  ref: /pandas/tseries/tests/test_converter.py
       /pandas/tests/test_algos.py:TestFactorize
class_docstr_tok: ["Based","on","the","pandas","conversion","and","factorization","tests",":","ref",":","\/pandas\/tseries\/tests\/test_converter.py","\/pandas\/tests\/test_algos.py",":","TestFactorize"]
code: def test_convert_one_string(self, value):
      assert self.cc.convert(value, self.unit, self.ax) == 0
  
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 3 for calling the TestStrCategoryConverter obj's underlying member method code with example usage: obj.test_convert_one_string(value) without return types