function adjacentElementsProduct(nums) {
    var c = nums[0] * nums[1];
    var p = c;
    for (var i = 1; i < nums.length; i++) {
        var c = nums[i] * nums[i + 1];
        if (c > p) {
            p = c;
        };
    };
    return p;
};


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