code: def test_raise(self):
      try:
          self.reader.read(self.data_file, fmt="bla bla")
      except ValueError:
          assert True
  
file_path: cornac/tests/cornac/data/test_reader.py
imports: import unittest
  from cornac.data import Reader
  from cornac.data.reader import read_text
label_desc: Use image node_id 2 for calling the TestReader obj's underlying member method code with example usage: obj.test_raise() without return types