class_docstr: Most tests done in the base class LinearOperatorDerivedClassTest.
class_docstr_tok: ["Most","tests","done","in","the","base","class","LinearOperatorDerivedClassTest","."]
code: def test_assert_non_singular_raises_if_zero_eigenvalue(self):
      # Singular matrix with one positive eigenvalue and one zero eigenvalue.
      with self.cached_session():
          diag = [1.0, 0.0]
          operator = linalg.LinearOperatorDiag(
              diag, is_self_adjoint=True
          )
          with self.assertRaisesOpError("Singular operator"):
              operator.assert_non_singular().run()
  
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 8 for calling the LinearOperatorDiagTest obj's underlying member method code with example usage: obj.test_assert_non_singular_raises_if_zero_eigenvalue() without return types