function adjacentElementsProduct(nums) {
    //  write code here.
    let pro = 0, max = 0
    for (let i=0; i<nums.length; i++){
        pro = nums[i]*nums[i+1]
        if(pro>max) max=pro
        console.log(pro)
    }
    return max
}



/**
* Test Suite 
*/
describe('adjacentElementsProduct()', () => {
    it('returns largest product of adjacent values', () => {
        // arrange
        const nums = [3, 6, -2, -5, 7, 3];
        
        // act
        const result = adjacentElementsProduct(nums);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe(21);
    });
});