ZCW-PhoneBook/PhoneBookTest.java

import org.junit.Assert;
import org.junit.Test;

/**
 * The test class PhoneBookTest.
 *
 * @author  (your name)
 * @version (a version number or a date)
 */
public class PhoneBookTest
{
    @Test
    public void addEntryTest(){
    //Given
    PhoneBook phoneBook = new PhoneBook();
    String name = "Zebra";
    String phoneNumber = "111-222-333";
    String expected = "Zebra , 111-222-333";
    //When
    phoneBook.addEntry(name,phoneNumber);
    
    //Then
    Assert.assertEquals(1,phoneBook.size());
    
    }
    @Test
    public void removeEntry(){
    //Given
    PhoneBook phoneBook = new PhoneBook();
    String name = "Zebra";
    String expected = "";
    //when
    phoneBook.removeEntry(name);
    //Then
    Assert.assertEquals(0, phoneBook.size());
    }
    
    public String lookUp(){
    return null;
    } 
    
    
}