function sumOddFibonacciNumbers(num) {
    //  write code here.
  if (num < 2) return 2;
  const cache = [1, 1];
  let sumOfOddFibNums = 2;
  while (cache[0] + cache[1] <= num) {
    const nextFibNum = cache[0] + cache[1];
    if (nextFibNum % 2) {
      sumOfOddFibNums += nextFibNum;
    }
    cache[0] = cache[1];
    cache[1] = nextFibNum;
  }
  return sumOfOddFibNums;
}



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