function sumOddFibonacciNumbers(num) {
    let prev = 0;
    let curr = 1;
    let sum = 0;
    let tmp = undefined;
    
    if (num < 1) {
        return undefined
    }
    
    while (curr <= num) {
        if (curr % 2) {
            sum += curr;
        }
        tmp = prev + curr
        prev = curr
        curr = tmp
    }
    
    return sum;
}


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