function sumOddFibonacciNumbers(num) {
    //  write code here.
    if(num <= 0){
        console.error('Invalid input!')
        return NaN;
    }
    let answer = 2
    let a = 1, b = 1, c = 0
    while(a+b <= num){
        c = a+b
        a = b
        b = c
        if(c%2)
            answer += c
    }
    return answer
}



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