code: def testShapeUknown(self):
      loc = tf1.placeholder_with_default(np.float32([0]), shape=[None])
      dist = det.VectorDeterministic(loc, validate_args=True)
      self.assertAllEqual(dist.event_shape_tensor().shape, [1])
  
imports: from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.distributions import deterministic
  from tensorflow_probability.python.distributions import gamma
  from tensorflow_probability.python.distributions import kullback_leibler
  from tensorflow_probability.python.distributions import mvn_diag
  from tensorflow_probability.python.internal import tensorshape_util
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 3 for calling the VectorDeterministicTest obj's underlying member method code with example usage: obj.testShapeUknown() without return types