class_docstr: Most tests done in the base class LinearOperatorDerivedClassTest.
class_docstr_tok: ["Most","tests","done","in","the","base","class","LinearOperatorDerivedClassTest","."]
code: def test_is_x_flags(self):
      # The is_x flags are by default all True.
      operator = linalg_lib.LinearOperatorZeros(num_rows=2)
      self.assertFalse(operator.is_positive_definite)
      self.assertFalse(operator.is_non_singular)
      self.assertTrue(operator.is_self_adjoint)
  
imports: import numpy
  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 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 20 for calling the LinearOperatorZerosTest obj's underlying member method code with example usage: obj.test_is_x_flags() without return types