code: def test_dump(self):
      # test dump
      self.assertEqual(
          {
              "sentence1": "我喜欢这本书。",
              "sentence2": "这本书是我讨厌的。",
              "y": "0",
              "sample_id": None,
          },
          csm_sample.dump(),
      )
  
imports: import unittest
  from textflint.input.component.sample.smcn_sample import *
label_desc: Use image node_id 2 for calling the TestSMSample obj's underlying member method code with example usage: obj.test_dump() without return types