code: def test_one_operand_11(self):
      r = self.rng()
      x = r.randn(3, 3, 4)
      s = "iij->i"
      self._check(s, x)
  
imports: from collections import defaultdict
  from functools import partial
  import itertools
  import numpy
  from absl.testing import absltest
  from absl.testing import parameterized
  import jax
  from jax import dtypes
  from jax import lax
  import jax.numpy
  import jax._src.test_util
  from jax import config
label_desc: Use image node_id 20 for calling the EinsumTest obj's underlying member method code with example usage: obj.test_one_operand_11() without return types