def test_should_the_solution_remain_unchanged_if_the_probability_is_zero(
self):
operator = PolynomialMutation(0.0)
solution = FloatSolution(2, 1, [-5, -5, -5], [5, 5, 5])
solution.variables = [1.0, 2.0, 3.0]
mutated_solution = operator.execute(solution)
self.assertEqual([1.0, 2.0, 3.0], mutated_solution.variables)
def test_should_the_solution_change__if_the_probability_is_one(self):
operator = PolynomialMutation(1.0)
solution = FloatSolution([-5, -5, -5], [5, 5, 5], 2)
solution.variables = [1.0, 2.0, 3.0]
mutated_solution = operator.execute(solution)
self.assertNotEqual([1.0, 2.0, 3.0], mutated_solution.variables)
def test_should_execute_work_with_a_solution_subclass_of_float_solution(
self):
class NewFloatSolution(FloatSolution):
def __init__(self,
lower_bound: List[float],
upper_bound: List[float],
number_of_objectives: int,
number_of_constraints: int = 0):
super(NewFloatSolution,
self).__init__(lower_bound, upper_bound,
number_of_objectives,
number_of_constraints)
operator = PolynomialMutation(1.0)
solution = NewFloatSolution([-5, -5, -5], [5, 5, 5], 2)
solution.variables = [1.0, 2.0, 3.0]
mutated_solution = operator.execute(solution)
self.assertNotEqual([1.0, 2.0, 3.0], mutated_solution.variables)