def test_two_calls_compute_budgets_raise_exception(self):
budget_accountant = PLDBudgetAccountant(total_epsilon=1,
total_delta=1e-6)
budget_accountant.request_budget(mechanism_type=MechanismType.LAPLACE)
budget_accountant.compute_budgets()
with self.assertRaises(Exception):
# Budget can be computed only once.
budget_accountant.compute_budgets()
def test_request_after_compute_raise_exception(self):
budget_accountant = PLDBudgetAccountant(total_epsilon=1,
total_delta=1e-6)
budget_accountant.request_budget(mechanism_type=MechanismType.LAPLACE)
budget_accountant.compute_budgets()
with self.assertRaises(Exception):
# Budget can not be requested after it has been already computed.
budget_accountant.request_budget(
mechanism_type=MechanismType.LAPLACE)
def test_invalid_gaussian_delta(self):
accountant = PLDBudgetAccountant(total_epsilon=1, total_delta=0)
with self.assertRaises(AssertionError):
accountant.request_budget(MechanismType.GAUSSIAN)
def test_compute_budgets_none_noise(self):
accountant = PLDBudgetAccountant(total_epsilon=3, total_delta=1e-5)
accountant.compute_budgets()
self.assertEqual(None, accountant.minimum_noise_std)
def test_invalid_delta(self):
with self.assertRaises(ValueError):
PLDBudgetAccountant(total_epsilon=1, total_delta=-1e-5)