function sumOddFibonacciNumbers(num) {
  if (num < 0) {
    throw 'number must be zero or positive';
  }
  
  if (num === 0) {
    return 0;    
  }
  
  if (num === 1) {
    return 1;    
  }
  
  let sumOddNums = 1;
  const fibHelper = [0, 1];
  let nextFib = fibHelper[0] + fibHelper[1];
  
  for (let i = 2; nextFib <= num; i++) {
    fibHelper[fibHelper.length] = fibHelper[i - 2] + fibHelper[i - 1];
    if (fibHelper[fibHelper.length - 1] % 2 !== 0) {
      sumOddNums += fibHelper[fibHelper.length - 1];
    }
    nextFib = fibHelper[i - 1] + fibHelper[i];
  }
  
  return sumOddNums;
}



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