code: def test_xlnet_qa(self):
      self.model_tester.set_seed()
      config_and_inputs = self.model_tester.prepare_config_and_inputs()
      self.model_tester.create_and_check_xlnet_qa(*config_and_inputs)
  
imports: import random
  import unittest
  from transformers import XLNetConfig, is_torch_available
  from transformers.testing_utils import require_torch, slow, torch_device
  from ...generation.test_utils import GenerationTesterMixin
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, ids_tensor, random_attention_mask
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 12 for calling the XLNetModelTest obj's underlying member method code with example usage: obj.test_xlnet_qa() without return types