class_docstr: Most tests done in the base class LinearOperatorDerivedClassTest.
class_docstr_tok: ["Most","tests","done","in","the","base","class","LinearOperatorDerivedClassTest","."]
code: def test_diag_cholesky_type(self):
      diag = [1.0, 3.0, 5.0, 8.0]
      operator = linalg.LinearOperatorDiag(
          diag,
          is_positive_definite=True,
          is_self_adjoint=True,
      )
      self.assertIsInstance(
          operator.cholesky(), linalg.LinearOperatorDiag
      )
  
imports: from tensorflow.python.framework import config
  from tensorflow.python.framework import test_util
  from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import linalg_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import random_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.platform import test
label_desc: Use image node_id 17 for calling the LinearOperatorDiagTest obj's underlying member method code with example usage: obj.test_diag_cholesky_type() without return types