Question

Write JunitTest for the class below:

public class Dice

{

   private Die die1;
   private Die die2;

   public Dice(int[] programmedRolls)
   {
       int[] programmableroll = programmedRolls;
       this.die1 = new Die(programmableroll);
       this.die1 = new Die(programmableroll);
   }

}

Answer 1

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import static org.junit.Assert.assertEquals;
import org.junit.Before;
import org.junit.Test;
public class DiceTest

{
    private Dice dice;
    private Die die1, die2;
    private int[] rollDie1, rollDie2;

    @Before
    public void setUp() throws Exception
    {
        this.rollDie1 = new int[] { 1, 2, 3 };
        this.die1 = new Die(rollDie1);

        this.rollDie2 = new int[] { 1, 2, 3 };
        this.die2 = new Die(rollDie2);

        this.dice = new Dice(die1, die2);
    }

    @Test
    public void test_Init_PredictableDie()
    {
        dice.roll();
        int value = dice.getLastRoll();
        assertEquals(2, value);
    }

    @Test
    public void test_Predictable_Roll_2()
    {
        dice.roll();
        dice.roll();
        int value = dice.getLastRoll();
        assertEquals(4, value);
    }

    @Test
    public void test_Predictable_Roll_3()
    {
        dice.roll();
        dice.roll();
        dice.roll();
        int value = dice.getLastRoll();
        assertEquals(6, value);
    }

    @Test
    public void test_toString()
    {
        dice.toString();
        assertEquals("Dice with last roll:   => + ", "Dice with last roll:   => + ");
    }

}
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

public class Dice

{
    private Die die1;
    private Die die2;

    public Dice()
    {
    
        this.die1 = new Die();
        this.die2 = new Die();
    }

    public Dice(int[] programmedRolls)
    {
        int[] programmableroll = programmedRolls;
        this.die1 = new Die(programmableroll);
        this.die1 = new Die(programmableroll);

    }

    public Dice(Die die1, Die die2)
    {
        this.die1 = die1;
        this.die2 = die2;
    }

    public void roll() {
        die1.roll();
        die2.roll();
    }

    public int getDie1Value() {
        return die1.getLastRoll();
    }

    public int getDie2Value() {
        return die2.getLastRoll();
    }

    public int getDiceValue()
    {
        return die1.getLastRoll() + die2.getLastRoll();
    }

    public int getLastRoll() {
        return die1.getLastRoll() + die2.getLastRoll();
    }

    public int getDie2() {
        return 0;
    }

    public int getDie1() {
        return 0;
    }

}
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
public class Die
{
    private int lastRoll;

    private int[] programmedRoll;
    private boolean isItARandomRoll;
    private int arrayIndex;

    public Die()
    {
        this.isItARandomRoll = true;
      
    }

    public Die(int[] runTimeArgForProgrammedRollArray)
    {

        if (runTimeArgForProgrammedRollArray == null)
        {
            throw new NullPointerException("Empty Array Initialized");
        } else
        {
            this.isItARandomRoll = false;
            this.programmedRoll = runTimeArgForProgrammedRollArray;
            this.arrayIndex = 0;

        }
    }

    public int getLastRoll()
    {
        return this.lastRoll;
    }

    public void roll()
    {
        if (isItARandomRoll == true)
        {
            this.lastRoll = (int) (Math.random() * 40 + 1);
        }
        else
        {

            this.lastRoll = this.programmedRoll[arrayIndex];

            arrayIndex++;

            if (arrayIndex >= this.programmedRoll.length)
            {
                arrayIndex = 0;
            }
        }

    }

    @Override
    public String toString()
    {
        return "Die: " + this.getLastRoll();
    }

}

DiceTest [-/IdeaProjects/DiceTest]-.../src/DiceTest.java [DiceTest] Project import static org.junit.Assert.assertEquals; import org.junit.Before; import org.junit.Test; public class DiceTest DiceTest ldeaProjects/DiceTest 'idea 4 G Dice DiceTest private Dice dice; private Die diel, die2 private intl rollDiel, rollDie2: Die DiceTest.iml IExternal Libraries Scratches and Consoles @Before public void setUp) throws Exception 12 this. roltoel-new int[] { 1, 2, 3 }; this.diel new Die(rolDie1); 15 16 this.rolloie2-new intl1 1, 2,3 this.die2 new Die(rolDie2); 17 this.dice-new Dice(diel, die2); 20 eTest public void test_Init_PredictableDie) 26 dice.rollo; int value dice.getLastRoll) assertEquals( expected: 2, value); 28 30 @Test public void test Predictable Roll 20 dice.roll0; dice.roll) int value dice.getLastRoll): assertequalst expected: 4, value); 36 38 39 Test public void test Predictable Roll 30 41 42 43 dice. rolto; dice.rollO dice.roll); int value- dice.getLastRoll) 46 47 DiceTest