public void upgradeShip()
{
//assume each upgrade costs 2500 and will add 5 more capacity unit
upgrade sys = new upgrade();//defult top level is 4
int money = 3000;
int level = 1;
int compacity = 5;
sys.upgradeship(money, level, compacity);
Assert.AreNotEqual(3000, sys.upgradeship(money, level, compacity));//test if the balances are the same after the test
Assert.AreEqual(3000, money);
}
[TestMethod]//build the function
public void upgradeConstruct()
{
upgrade sys = new upgrade();
Assert.IsNotNull(sys);
}