function differentSymbolsNaive(str) {
    //  write code here.
    const arrNew = [];
    const strSplit = str.split('');
        // console.log(strSplit);
        // console.log(arrNew); 
        // console.log(arrNew.includes(strSplit));
        
        for(let i = 0; i < strSplit.length; i++) {
            if(!arrNew.includes(strSplit[i])) {
                arrNew.push(strSplit[i]);
            }
        }
        // console.log(arrNew);  
        return arrNew.length;
}



/**
* 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);
    });
});