docstr: Test string series
docstr_tok: ["Test","string","series"]
code: def test_series_dtype_1(self):
      """
      Test string series
      """
      s = pd.Series(["a", "b", "c", "d", "e"])
  
      assert series_dtype(s) == VarType.TYPE_CAT
  
imports: import unittest
  import numpy
  import pandas
  from shapash.report.common import VarType, series_dtype, numeric_is_continuous, get_callable, display_value, replace_dict_values
label_desc: Use image node_id 1 for calling the TestCommon obj's underlying member method code with example usage: obj.test_series_dtype_1() without return types