ZCW-PhoneBook/PhoneBookTest.java

import java.util.*;

import static org.junit.Assert.*;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class PhoneBookTest{
    Map<String, String> testPhonebook = new TreeMap<>();
    public PhoneBookTest(){
    }
    
    @Test
    public void addTest(){
        String number = "302-559-6954";
        String name = "Ken";
        
        testPhonebook.put(number, name);
        String expected = testPhonebook.get(number);
        assertEquals(name, expected);
    }
    
    @Test
    public void removeTest(){
        testPhonebook.put("9393939", "Hirself");
        testPhonebook.remove("9393939");
        
        String actual = testPhonebook.get("9393939");
        String expected = null;
        assertEquals(actual, expected);
    }
    
    @Test
    public void lookupTest(){
        testPhonebook.put("9393939", "Hirself");
        testPhonebook.get("9393939");
        
        String actual = testPhonebook.get("9393939");
        String expected = "Hirself";
        assertEquals(actual, expected);
    }
    
    @Test
    public void reverseLookupTest(){
        testPhonebook.put("9393939", "Hirself");
        testPhonebook.get("9393939");
        
        String actual = testPhonebook.get("Hirself");
        String expected = "9393939";
        assertEquals(actual, expected);
    }
    

}