class_docstr: Test cases for einsum op.
code: def testMatMul(self):
      for dtype in self.float_types:
          self._testBinary(
              lambda x, y: special_math_ops.einsum("ij,jk->ik", x, y),
              np.array([[-0.25]], dtype=dtype),
              np.array([[8]], dtype=dtype),
              expected=np.array([[-2]], dtype=dtype),
          )
  
file_path: tensorflow-upstream/tensorflow/compiler/tests/einsum_op_test.py
imports: import numpy
  from tensorflow.compiler.tests import xla_test
  from tensorflow.python.framework import dtypes
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import special_math_ops
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 3 for calling the EinsumOpTest obj's underlying member method code with example usage: obj.testMatMul() without return types