const avoidObstacles = nums => {
  let n = 2,
    found = false
  while (!found) {
    if (nums.every(num => num % n !== 0)) {
      found = true
    } else {
      n++
    }
  }
  return n
}



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