function sumOddFibonacciNumbers(num) {
    //  write code here.
    
    let prev = 0;
    let curr = 1;
    let res = 0;
    while(curr <= num) {
        if (curr % 2 !== 0) {
            res += curr;
        }
        curr += prev;
        prev = curr - prev;
    }
    return res;
}



/**
* Test Suite 
*/
describe('sumOddFibonacciNumbers()', () => {
    it('returns sum of all odd Fibonnci numbers', () => {
        // arrange
        const num = 10;
        
        // act
        const result = sumOddFibonacciNumbers(num);

        // log
        console.log("result 1: ", result);
        
        // assert
        expect(result).toBe(10);
    });

    it('returns sum of all odd Fibonnci numbers 2nd example', () => {
        // arrange
        const num = 1000;
        
        // act
        const result = sumOddFibonacciNumbers(num);

        // log
        console.log("result 2: ", result);
        
        // assert
        expect(result).toBe(1785);
    });
});