code: def test_initial_value(self):
      with hk.variables():
          v = tf.Variable(tf.ones([]))
      self.assertIsInstance(v, hk.TensorVariable)
      self.assertAllEqual(v, 1)
      self.assertAllEqual(v.read_value(), 1)
      self.assertAllEqual(v.tensor_value, 1)
  
imports: from absl.testing import parameterized
  import sonnet
  from sonnet.src import test_utils
  from sonnet.src.functional import haiku
  import tensorflow
  import tree
label_desc: Use image node_id 1 for calling the TensorVariableTest obj's underlying member method code with example usage: obj.test_initial_value() without return types