function adjacentElementsProduct(nums) {
    //  write code here.
    return nums.reduce(function(acc, int, i, nums){
        console.log(acc)
        if(nums.length > i + 1){
            return [
                ...acc, 
               int * nums[i + 1]
            ]
        }else{
            return acc;
        }
    }, []).reduce((acc, curValue) => {
        return Math.max(acc, curValue)
    })
}



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