Customer implements Comparable<Customer> { public void setLocation(String locationIn) { location = locationIn; } Customer(String nameIn); String getName(); void setLocation(String locationIn); void changeBalance(double amount); String getLocation(); double getBalance(); void setLocation(String city, String state); String toString(); int compareTo(Customer obj);  }
@Test public void setLocationTest() { Customer cstmr = new Customer("Lane, Jane"); cstmr.setLocation("Boston, MA"); Assert.assertEquals("Boston, MA", cstmr.getLocation()); }