code: def testOnpInterop(self):
      x_np = onp.sum(np.ones([1, 2]) + onp.ones([2, 1]))
      x_onp = onp.sum(onp.ones([1, 2]) + onp.ones([2, 1]))
      self.assertAllClose(x_onp, x_np)
  
imports: import numpy
  import tensorflow.compat.v2
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops.numpy_ops import np_math_ops
label_desc: Use image node_id 4 for calling the ReadmeTest obj's underlying member method code with example usage: obj.testOnpInterop() without return types