class_docstr: Most tests done in the base class LinearOperatorDerivedClassTest.
code: def test_scalar_row_col_raises(self):
      with self.assertRaisesRegex(
          ValueError, "must have at least 1 dimension"
      ):
          linear_operator_toeplitz.LinearOperatorToeplitz(1.0, 1.0)
  
      with self.assertRaisesRegex(
          ValueError, "must have at least 1 dimension"
      ):
          linear_operator_toeplitz.LinearOperatorToeplitz([1.0], 1.0)
  
      with self.assertRaisesRegex(
          ValueError, "must have at least 1 dimension"
      ):
          linear_operator_toeplitz.LinearOperatorToeplitz(1.0, [1.0])
  
imports: import contextlib
  import numpy
  import scipy.linalg
  from tensorflow.python.eager import backprop
  from tensorflow.python.framework import dtypes
  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 variables
  from tensorflow.python.ops.linalg import linalg
  from tensorflow.python.ops.linalg import linear_operator_test_util
  from tensorflow.python.ops.linalg import linear_operator_toeplitz
  from tensorflow.python.platform import test
label_desc: Use image node_id 6 for calling the LinearOperatorToeplitzTest obj's underlying member method code with example usage: obj.test_scalar_row_col_raises() without return types