Design test cases for the program segment below using basic path testing (please follow the steps of basic path testing, 15 points).

public void nextday( ){

1 switch( this.month){

2 case 1,3, 5, 7, 8, 10:

3 if( this.day == 31){

4 this.month = this.month + 1; this.day = 1; }

5 else{ this.day = this.day + 1; }

6 break;

7 case 4, 6, 9,11:

8 if( this.day == 30){

9 this.month = this.month + 1; this.day = 1; }

10 else{ this.day = this.day + 1; }

11 break;

12 case 12:

13 if( this.day == 31){

14 this.month = 1; this.day = 1; this.year = this.year + 1; }

15 else{ this.day = this.day + 1; }

16 break;

17 case 2:

18 if( this.isleap()){

19 if(this.day == 29) {

20 this.day = 1; this.month = 3; }

21 else{ this.day = this.day + 1; }

}

22 else{

23 if(this.day == 28){

24 this.day = 1; this.month = 3; }

25 else{ this.day = this.day + 1; }

}

26 break;

27 }

28 }