code: def test_failures(self):
      # every test should fail
      for shape, pattern in [
          ([1, 2, 3, 4], "a b c"),
          ([1, 2, 3, 4], "2 a b c"),
          ([1, 2, 3, 4], "a b c ()"),
          ([1, 2, 3, 4], "a b c d e"),
          ([1, 2, 3, 4], "a b c d e ..."),
          ([1, 2, 3, 4], "a b c ()"),
      ]:
          with pytest.raises(RuntimeError):
              x = numpy.ones(shape)
              parse_shape(self.backend.from_numpy(x), pattern)
  
imports: import sys
  import unittest
  from doctest import testmod
  from typing import Dict, List, Optional
  import numpy
  import pytest
  from parameterized import parameterized, parameterized_class
  import einops
  import einops.layers
  import einops.parsing
  from einops._backends import AbstractBackend
  from einops.einops import rearrange, parse_shape, _optimize_transformation
  from .None import collect_test_backends, is_backend_tested
label_desc: Use image node_id 9 for calling the TestParseShapeImperative obj's underlying member method code with example usage: obj.test_failures() without return types