code: def test_validate_format(self):
      self.assertEqual("UIR", validate_format("UIR", ["UIR"]))
      self.assertEqual("UIRT", validate_format("UIRT", ["UIRT"]))
  
      try:
          validate_format("iur", ["UIR"])
      except ValueError:
          assert True
  
imports: import unittest
  import numpy
  import numpy.testing
  import scipy.sparse
  from cornac.utils.common import sigmoid
  from cornac.utils.common import safe_indexing
  from cornac.utils.common import validate_format
  from cornac.utils.common import scale
  from cornac.utils.common import clip
  from cornac.utils.common import excepts
  from cornac.utils.common import intersects
  from cornac.utils.common import estimate_batches
  from cornac.utils.common import get_rng
  from cornac.utils.common import normalize
label_desc: Use image node_id 7 for calling the TestCommon obj's underlying member method code with example usage: obj.test_validate_format() without return types