def test_that_valid_solution_is_identified(self):
bnb = BranchAndBound(self.input_data_4)
valid_solution = [1, 1, 0, 0]
result = bnb.valid(np.array(valid_solution))
self.assertEqual(result, True)
def test_that_invalid_solution_is_identified(self):
bnb = BranchAndBound(self.input_data_4)
invalid_solution = [1, 0.25, 1, 0]
result = bnb.valid(np.array(invalid_solution))
self.assertEqual(result, False)