function adjacentElementsProduct(nums) {
    let sum = 0;
    let holder = 0;
    for(let i = 0; i < nums.length; i++){
        holder = nums[i] * nums[i + 1];
        if(holder > sum){
            sum = holder;
        }
    }
    return sum;
}



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