code: def test_accessor_works(self):
      register_series_accessor("test")(CustomAccessor)
  
      s = ps.Series([1, 2])
      assert s.test.obj is s
      assert s.test.prop == "item"
      assert s.test.method() == "item"
  
imports: import contextlib
  import numpy
  import pandas
  from pyspark import pandas
  from pyspark.testing.pandasutils import assert_produces_warning, ComparisonTestBase
  from pyspark.pandas.extensions import register_dataframe_accessor, register_series_accessor, register_index_accessor
label_desc: Use image node_id 7 for calling the ExtensionTestsMixin obj's underlying member method code with example usage: obj.test_accessor_works() without return types