Need Help with Java and Junit

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Java

Ok guys I neeed quick help with my assigment I think it is not something difficult
You see I have to write Bowling Code kata like this
?
1

http://programmingpraxis.com/2009/08/11/uncle-bobs-bowling-game-kata/

and I have writen the code for it

Here is my Bowling Class

public class BowlingGame {
private int roll = 0;
private int [] rolls = new int[21];
 
 
public void roll(int...rolls){
    for(int pinsDown:rolls){
        if(pinsDown>10){
            throw new IllegalArgumentException();
        }else{
        roll(pinsDown);
        }
 
    }
 
}
 
 
public void roll(int pinsDown){
    rolls[roll++] =pinsDown;
}
 
 
public int score(){
    int score = 0;
    int cursor = 0;
 
    for(int frame = 0;frame<10;frame++){
        if(rolls[cursor]==10){ // check if it is strike
            score+=10 + rolls[cursor+1] + rolls[cursor+2];
            cursor++;
        }else if(rolls[cursor] + rolls[cursor+1]==10){ // check if it is spare
            score+=10 + rolls[cursor+2];
            cursor+=2;
        }else{
            score+=rolls[cursor] + rolls[cursor+1];
            cursor+=2;
        }
    }
    return score;
 
}
}

and here is my Test Class

public class TestBowling {
private BowlingGame game;
 
@Before
public void setingUp(){
    game = new BowlingGame();
}
 
@Test
public void canScore60(){
    game.roll(3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3);
    assertThat(game.score(), is(60));
 
}
 
 
 
@Test
public void canScorePerfect(){
    game.roll(10,10,10,10,10,10,10,10,10,10,10,10);
    assertThat(game.score(), is(300));
 
}
 
 
@Test
public void canScore67(){
    game.roll(3,3,3,3,3,3,3,3,4,6,3,3,3,3,3,3, 3,3, 3,3);
    assertThat(game.score(), is(67));
 
}
 
 
@Test
public void canScore75(){
    game.roll(3,3,3,3,3,3,3,3,4,6,4,6,3,3,3,3, 3,3, 3,3);
    assertThat(game.score(), is(75));
 
}
 
 
@Test
public void canScore70(){
    game.roll(3,3,3,3,3,3,3,3,10,3,3,3,3,3,3, 3,3, 3,3);
    assertThat(game.score(), is(70));
 
}
 
 
@Test
public void canScore87(){
    game.roll(3,3,3,3,3,3,3,3,10,10,3,3,3,3,3, 3,3, 3,3);
    assertThat(game.score(), is(87));
 
}
 
 
@Test
public void canScore70with10(){
    game.roll(3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,10,3,3);
    assertThat(game.score(), is(70));
 
}
 
 
 
 
@Test
public void canScore84(){
    game.roll(3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,10,10,10);
    assertThat(game.score(), is(84));
 
}
 
 
@Test
public void canScoreWith3and7(){
    game.roll(3,7,3,7,3,7,3,7,3,7,3,7,3,7,3,7,3,7,3,7,3);
    assertThat(game.score(), is(130));
 
}
 
 
 
 
 
 
 
 
 
//this tests should fail
 
@Test (expected = IllegalArgumentException.class)
public void testing15() {
    int a = 15;
    game.roll(a);
 
}
 
 
 
@Test (expected = IllegalArgumentException.class)
public void testingLetter() {
    char c = 'c';
    game.roll(c);
 
}
}

My Question is how can I test this

Test wrong input with 15 for one throw
with two throws in the same frame bigger than 10
with a letter input