function differentSymbolsNaive(str) {
    //  write code here.
    let a =[...str] //converts string to array of string
    let b = new Set(a) //converting to set removes duplicate
    return b.size //function of set to get size of set
   } 
     



/**
* Test Suite 
*/
describe('differentSymbolsNaive()', () => {
    it('returns count of unique characters', () => {
        // arrange
        const str = 'cabca';
        
        // act
        const result = differentSymbolsNaive(str);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(3);
    });
    
    it('returns count of unique number', () => {
        // arrange
        const str = '2356662';
        
        // act
        const result = differentSymbolsNaive(str);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(4);
    });
    
    it('returns count of unique symbols', () => {
        // arrange
        const str = '$%$$&*';
        
        // act
        const result = differentSymbolsNaive(str);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(4);
    });
    
    it('returns count of unique mix of num and letter', () => {
        // arrange
        const str = '2S4SG';
        
        // act
        const result = differentSymbolsNaive(str);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(4);
    });
    
    
});