text: from continual import TensorPlaceholder
  
  
  def test_TensorPlaceholder():
      # No shape
      tp = TensorPlaceholder()
      assert tp.size() == tuple()
      assert len(tp) == 0
  
      # Shape
      tp = TensorPlaceholder(shape=(1, 2, 3))
      assert tp.size() == (1, 2, 3)
      assert len(tp) == 0
  