function avoidObstacles(nums) {
    let jumps = [];
    var maxDigitInNums = Math.max(...nums);
    if (maxDigitInNums === 0) return 1;

    jumps = [...Array(maxDigitInNums + 2).keys()].slice(2).filter(d => {
        return nums.every(n => n % d > 0)
    })

    return jumps[0];
}



/**
* Test Suite 
*/
describe('avoidObstacles()', () => {
    it('returns minimal number of jumps in between numbers', () => {
        // arrange
        const nums = [5, 3, 6, 7, 9];
        
        // act
        const result = avoidObstacles(nums);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(4);
    });
});