AccountTest.java

public class AccountTest {
    @Test public void contains() throws Exception {
        SortedSet<Account> set = new TreeSet<Account>(Account.NAME_COMPARATOR);
        Account first = new Account("first", 1);
        set.add(first);
	
        Account otherFirst = new Account("first", 2);
        assertFalse(set.contains(otherFirst));
    }
}