main.m

//
//  main.m
//  Random
//
//  Created by shichimi on 2017/07/01.
//  Copyright © 2017年 shichimitoucarashi. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Random.h"


int main(int argc, const char * argv[]) {
    @autoreleasepool {
        
        [[Random new]TEST];
        
    }
    return 0;
}

Random.h

//
//  Random.h
//  Random
//
//  Created by shichimi on 2017/07/01.
//  Copyright © 2017年 shichimitoucarashi. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Random : NSObject
-(void)TEST;
-(void) TEST_RANDOM;
@end

Random.m

//
//  Random.m
//  Random
//
//  Created by shichimi on 2017/07/01.
//  Copyright © 2017年 shichimitoucarashi. All rights reserved.
//

#import "Random.h"

#define TEST_COUNT_NUMBER 3

@implementation Random

-(NSArray *)randomArray:(NSArray *)array{
    NSMutableArray* ary = array.mutableCopy;
    for(NSInteger n = 0; n < array.count;n++){
        NSInteger random = arc4random() % array.count;
        [ary exchangeObjectAtIndex:n withObjectAtIndex:random];
    }
    return ary.mutableCopy;
}

-(void)TESTCODE:(NSArray*)ary
        TESTVal:(void (^)(NSInteger i,NSInteger n,NSInteger same))handler{
    
    NSInteger count = 0;
    
    for(NSInteger i=0;i<ary.count;i++){
        count = 0;
        for(NSInteger n = 0;n<ary.count;n++){
            handler(i,n,count);
        }
    }
}


-(void)TEST{
    
    __block NSInteger num = 0;
    __block BOOL isBUSTED = NO;
    
    for(;num<TEST_COUNT_NUMBER;){
        
        __block NSArray* random = [self randomArray:[self insertNumber:3]];
        
        [self TESTCODE:random TESTVal:^(NSInteger i, NSInteger n,NSInteger same) {
            
            if([random[i]integerValue] == [random[n]integerValue]){
                same++;
                if(same==2){
                    isBUSTED = YES;
                
                }
            }
            
            if(isBUSTED)
                printf("\n BUSTED  Failuer \n");
                
            if(i>=(random.count-1) && n>=(random.count-1)){
                num++;
                printf("COMPLETION %ld TIME TEST\n",num);
            }
        }];
        
    }
    printf("\nCompletion\n\n");
}

/*********************************************
 *
 * TEST CODE
 *
 *
 */
-(BOOL) TEST_RANDOM:(NSArray*)ary {
    BOOL isUnique = NO;
    for(NSInteger i=0;i<ary.count;i++){
        int count = 0;
        for(NSInteger n = 0;n<ary.count;n++){
            if([ary[n]integerValue]==[ary[i]integerValue]){
                count++;
                if(count==2){
                    isUnique = YES;
                }
            }
        }
    }
    return isUnique;
}

-(void) TEST_RANDOM {
    
    for ( NSInteger num = 0; num < TEST_COUNT_NUMBER; num++ ){
        
        NSArray* numbers = [self insertNumber:30];
     
        NSArray* randoms = [self randomArray:numbers];
        
        if( [self TEST_RANDOM:randoms] == YES ){
            
            NSLog(@"Failuer Not unique and Random");
            
        }
    }
}


-(NSMutableArray*)insertNumber:(NSInteger)number{
    NSMutableArray* array = [NSMutableArray array];
    for(NSInteger i = 0; i<number;i++){
        [array addObject:[NSNumber numberWithInteger:i]];
    }
    return array;
}

@end