Mocking a global variable

Question

I\'ve been trying to implement some unit tests for a module. An example module named alphabet.py is as follows:

import database

def length_letters(         


        

Answer 1

Variables can be patched as follows:

from mock import patch
@patch('module.variable', new_value)    

For example:

import alphabet
from mock import patch
@patch('alphabet.letters', ['a', 'b', 'c'])
class TestAlphabet():

    def test_length_letters(self):
        assert 3 == alphabet.length_letters()

    def test_contains_letter(self):
       assert alphabet.contains_letter('a')