code: def test_1d_array(self):
      r_f, y_true = self._get_raw_data()
      raw_feature = np.asarray(r_f)
  
      target = _get_raw_MetricFrame()
      result = target._process_features("CF", raw_feature, y_true)
      self._common_validations(result, "CF0")
  
imports: import numpy
  import pandas
  import pytest
  import fairlearn.metrics
  from .utils import _get_raw_MetricFrame
label_desc: Use image node_id 6 for calling the TestSingleFeature obj's underlying member method code with example usage: obj.test_1d_array() without return types