def test_should_the_operator_work_with_a_solution_with_three_binary_variables(
self, random_call):
operator = SPXCrossover(1.0)
solution1 = BinarySolution(number_of_variables=3,
number_of_objectives=1)
solution1.variables[0] = [True, False, False, True, True, False]
solution1.variables[1] = [True, False, False, True, False, False]
solution1.variables[2] = [True, False, True, True, True, True]
solution2 = BinarySolution(number_of_variables=3,
number_of_objectives=1)
solution2.variables[0] = [False, True, False, False, True, True]
solution2.variables[1] = [True, True, False, False, True, False]
solution2.variables[2] = [True, True, True, False, False, True]
random_call.return_value = 8
offspring = operator.execute([solution1, solution2])
self.assertEqual([True, False, False, True, True, False],
offspring[0].variables[0])
self.assertEqual([True, False, False, False, True, False],
offspring[0].variables[1])
self.assertEqual([True, True, True, False, False, True],
offspring[0].variables[2])
self.assertEqual([False, True, False, False, True, True],
offspring[1].variables[0])
self.assertEqual([True, True, False, True, False, False],
offspring[1].variables[1])
self.assertEqual([True, False, True, True, True, True],
offspring[1].variables[2])
def test_should_the_solution_remain_unchanged_if_the_probability_is_zero(self):
operator = SPXCrossover(0.0)
solution1 = BinarySolution(number_of_variables=1, number_of_objectives=1)
solution1.variables[0] = [True, False, False, True, True, False]
solution2 = BinarySolution(number_of_variables=1, number_of_objectives=1)
solution2.variables[0] = [False, True, False, False, True, False]
offspring = operator.execute([solution1, solution2])
self.assertEqual([True, False, False, True, True, False], offspring[0].variables[0])
self.assertEqual([False, True, False, False, True, False], offspring[1].variables[0])
def test_should_the_operator_work_if_the_third_bit_is_selected(self, random_call):
operator = SPXCrossover(1.0)
solution1 = BinarySolution(number_of_variables=1, number_of_objectives=1)
solution1.variables[0] = [True, False, False, True, True, False]
solution2 = BinarySolution(number_of_variables=1, number_of_objectives=1)
solution2.variables[0] = [False, True, False, False, True, True]
random_call.return_value = 3
offspring = operator.execute([solution1, solution2])
self.assertEqual([True, False, False, False, True, True], offspring[0].variables[0])
self.assertEqual([False, True, False, True, True, False], offspring[1].variables[0])