// solution
// function differentSymbolsNaive(str) {
//     let uniqueArr = [];
//     str.split("").forEach((unique) => {
//         if (!uniqueArr.includes(unique)) {
//             uniqueArr.push(unique)
//         }
//     }); 
//     return uniqueArr.length;   
// }

//cooler solution
const differentSymbolsNaive = str => new Set(str).size;

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