>>> from trucks import assign_truck

>>> lprod = [['AB4', 100], ['GH6', 71], ['PK7', 65], ['LJ8', 78], ['TF', 14]]
>>> a = assign_truck(lprod, 'C34', 250)
>>> lprod
[['AB4', 100, 'C34'], ['GH6', 71, 'C34'], ['PK7', 65, 'C34'], ['LJ8', 78], ['TF', 14, 'C34']]
>>> a == None
True

>>> lprod = [['AB4', 100], ['GH6', 71], ['PK7', 65], ['LJ8', 20], ['TF', 92], ['FT5', 5]]
>>> c = assign_truck(lprod, 'C43', 200)
>>> lprod
[['AB4', 100, 'C43'], ['GH6', 71, 'C43'], ['PK7', 65], ['LJ8', 20, 'C43'], ['TF', 92], ['FT5', 5, 'C43']]
>>> c == None
True

>>> lprod = [['AB4', 100], ['GH6', 71], ['PK7', 65], ['LJ8', 78], ['TF', 92], ['FT5', 95]]
>>> b = assign_truck(lprod, 'C25', 50)
>>> lprod
[['AB4', 100], ['GH6', 71], ['PK7', 65], ['LJ8', 78], ['TF', 92], ['FT5', 95]]
>>> b == None
True

>>> lprod = [['AB4', 100], ['GH6', 71], ['PK7', 65], ['LJ8', 78], ['TF', 92], ['FT5', 95]]
>>> d = assign_truck(lprod, 'C58', 1200)
>>> lprod
[['AB4', 100, 'C58'], ['GH6', 71, 'C58'], ['PK7', 65, 'C58'], ['LJ8', 78, 'C58'], ['TF', 92, 'C58'], ['FT5', 95, 'C58']]
>>> d == None
True

>>> lprod = [['AB4', 100], ['GH6', 71], ['PK7', 65], ['LJ8', 78], ['TF', 92], ['FT5', 95]]
>>> e = assign_truck(lprod, 'C25', 165)
>>> lprod
[['AB4', 100, 'C25'], ['GH6', 71], ['PK7', 65, 'C25'], ['LJ8', 78], ['TF', 92], ['FT5', 95]]
>>> e == None
True