function adjacentElementsProduct(nums) {
    maxProd = -Infinity
    for (let i = 0; i < nums.length - 1; i++) {
        let firstNum = nums[i]
        let secondNum = nums[i + 1]
        let prod = firstNum * secondNum
        if (prod > maxProd) {
            maxProd = prod
        }
    }
    return maxProd
}



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