public void TestCost()
{
var grasp = new GRASP();
var cities1 = new List<City> {new City(0, 0), new City(1, 1), new City(2, 2), new City(3, 3)};
Assert.AreEqual(1 * 2, grasp.Cost(new List<int>() { 0, 1 }, cities1));
Assert.AreEqual(3 + 4, grasp.Cost(new List<int>() { 0, 1, 2, 3 }, cities1));
Assert.AreEqual(4 * 2, grasp.Cost(new List<int>() { 0, 3 }, cities1));
}
public void TestLocalSearch()
{
var grasp = new GRASP(20);
var cities1 = new List<City> {new City(0, 0), new City(3, 3), new City(1, 1), new City(2, 2), new City(4, 4)};
var best = new Candidate();
best.Vector = new List<int>() {0, 1, 2, 3, 4};
best.Cost = grasp.Cost(best.Vector, cities1);
var rs = grasp.LocalSearch(best, cities1);
Assert.IsNotNull(rs);
Assert.IsNotNull(rs.Vector);
Assert.IsNotNull(rs.Cost);
Assert.AreNotSame(best, rs);
Assert.AreNotEqual(best.Vector, rs.Vector);
Assert.AreNotEqual(best.Cost, rs.Cost);
// No improvement
grasp = new GRASP(10);
best = new Candidate();
best.Vector = new List<int>() {0, 2, 3, 1, 4};
best.Cost = grasp.Cost(best.Vector, cities1);
rs = grasp.LocalSearch(best, cities1);
Assert.IsNotNull(rs);
Assert.AreEqual(best.Cost, rs.Cost);
}
