Write a python function to find the largest product of the pair of adjacent elements from a given list of integers.
def adjacent_num_product(list_nums):
    return max(a*b for a, b in zip(list_nums, list_nums[1:]))
<s>[INST]<<SYS>>Given a task and its code, generate test cases for the code.<</SYS>>Write a python function to find the largest product of the pair of adjacent elements from a given list of integers.
def adjacent_num_product(list_nums):
    return max(a*b for a, b in zip(list_nums, list_nums[1:]))[/INST]assert adjacent_num_product([1,2,3,4,5,6]) == 30
assert adjacent_num_product([1,2,3,4,5]) == 20
assert adjacent_num_product([2,3]) == 6</s>