Using python's mock patch.object to change the return value of a method called within another method

Question

Is it possible to mock a return value of a function called within another function I am trying to test? I would like the mocked method (which will be called in many methods

Answer 1

This can be done with something like this:

# foo.py
class Foo:
    def method_1():
        results = uses_some_other_method()


# testing.py
from mock import patch

@patch('Foo.uses_some_other_method', return_value="specific_value"):
def test_some_other_method(mock_some_other_method):
    foo = Foo()
    the_value = foo.method_1()
    assert the_value == "specific_value"

Here's a source that you can read: Patching in the wrong place