function adjacentElementsProduct(nums) {
    //  write code here.
    // console.log(nums);
    const arraySums = [];
    
    for(let i = 0; i < nums.length - 1; i++) {
        // console.log(nums[i]);
        arraySums.push(nums[i] * nums[i + 1]);
    }
    // console.log(arraySums);
    // console.log(Math.max(...arraySums));
    return Math.max(...arraySums);
}

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