ZCW-PhoneBook/PhoneBookTest.java

import static org.junit.Assert.*;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class PhoneBookTest
{
    PhoneBook pBookTest = new PhoneBook();

    @Test
    public void addNumberTest(){
        //when
        //pBook.add("Police", "9-1-1");

        //expected
        String expected = "Police 9-1-1";

        //actual
        String actual = pBookTest.add("Police","9-1-1");

        Assert.assertEquals(expected, actual);

    }


    @Test
    public void removeNumberTest(){
        //expected
        String expected = "Police";

        //actual
        String actual = pBookTest.remove("Police");

        Assert.assertEquals(expected, actual);

    }


    @Test
    public void lookUpNumberTest(){
        //when
        pBookTest.add("John Doe", "111-111-1111");

        //expected
        String expected = "111-111-1111";

        //actual
        String actual = pBookTest.lookUp("John Doe");

        Assert.assertEquals(expected, actual);
    }


    @Test
    public void reverseLookUpTest(){
        //when
        pBookTest.add("James Bond", "098-765-4321");

        //expected
        String expected = "James Bond";

        //actual
        String actual = pBookTest.reverseLookUp("098-765-4321");

        Assert.assertEquals(expected, actual);
    }


    @Test
    public void displayNumberTest(){
        //when
        pBookTest.add("Carol", "333-333-3333");
        pBookTest.add("Bruce", "222-222-2222");
        pBookTest.add("Alice", "111-111-1111");

        //expected
        String expected = "Alice 111-111-1111\n" +
            "Bruce 222-222-2222\n" +
            "Carol 333-333-3333\n";

        //actual
        String actual = pBookTest.displayPhoneBook();

        Assert.assertEquals(expected, actual);
    }





}