code: def testScalars(self):
      with self.session():
          with self.test_scope():
              s0 = constant_op.constant(2, dtypes.int32)
              s1 = constant_op.constant(3, dtypes.int32)
              s2 = constant_op.constant(5, dtypes.int32)
              packed = array_ops_stack.stack([s0, s1, s2])
              ans = self.evaluate(packed)
              self.assertAllEqual(ans, [2, 3, 5])
  
imports: import numpy
  from tensorflow.compiler.tests import xla_test
  from tensorflow.python import pywrap_sanitizers
  from tensorflow.python.framework import constant_op
  from tensorflow.python.framework import dtypes
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import array_ops_stack
  from tensorflow.python.ops import gen_array_ops
  from tensorflow.python.ops import gradients_impl
  from tensorflow.python.ops import math_ops
  from tensorflow.python.platform import googletest
label_desc: Use image node_id 2 for calling the PackTest obj's underlying member method code with example usage: obj.testScalars() without return types