text: /*
   * 알파벳 대, 소문자와 숫자로 이루어진 임의의 문자열을 생성합니다.
   */
  global.RANDOM_STR = METHOD(() => {
  	
  	const CHARACTERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  	
  	return {
  	
  		run : (length) => {
  			//REQUIRED: length
  	
  			let randomStr = '';
  	
  			REPEAT(length, () => {
  	
  				// add random character to random string.
  				randomStr += CHARACTERS.charAt(RANDOM({
  					limit : CHARACTERS.length
  				}));
  			});
  	
  			return randomStr;
  		}
  	};
  });
  