code: def testNotFullySpecifiedTask(self):
      a = constant_op.constant(1)
      b = constant_op.constant(2)
      with ops.device("/job:worker"):
          c = a + b
      self.assertIn("/job:worker/replica:0/task:0", c.device)
  
imports: from absl.testing import parameterized
  from tensorflow.python.eager import context
  from tensorflow.python.eager import def_function
  from tensorflow.python.eager import remote
  from tensorflow.python.eager import test
  from tensorflow.python.framework import config
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import errors
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import random_ops
label_desc: Use image node_id 2 for calling the ClusterPlacementTest obj's underlying member method code with example usage: obj.testNotFullySpecifiedTask() without return types