function differentSymbolsNaive(str) {
    //  write code here.
    let strArray = str.split("");
    let uniqueArray =[];
    for(let i=0; i<strArray.length; i++){
        if(!uniqueArray.includes(strArray[i])){
            uniqueArray.push(strArray[i])
        }
    }
    return uniqueArray.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);
    });
});