'function' object has no attribute 'assert_called_once_with'

Question

I\'m trying to run the following test using pytest and pytest_mock

def rm(filename):
    helper(filename, 5)

def helper(filename):
    pass

def test_unix_f         


        

Answer 1

In oriented object case:

class Foo:
    def rm(self, filename):
        self.helper(filename, 5)

    def helper(self, filename, number):
        pass

def test_unix_fs(mocker):
    mocker.patch.object(Foo, 'helper')
    foo = Foo()
    foo.rm('file')
    helper.assert_called_once_with('file', 5)