Mocking two functions with patch for a unit test

Question

I have a function I want to unit test contains calls two other functions. I am unsure how can I mock both functions at the same time properly using patch. I have provided an

Answer 1

In addition to the response @Matti John you can also use patch inside function test_write_out:

from mock import MagicMock, patch

def test_write_out():
    path = '~/collection'
    with patch('__builtin__.open') as mock_open, \
            patch('cPickle.dump') as mock_pickle:

        f = mock_open.return_value
        ...