How to unit test a method called within __init__() function?

I am trying to test a class method which is called within an init function.

class abc:

    def __init__(path):
         list = []
         foo(path) 
         bar('hello') # test function bar

    def foo(self, path):
          # does a bunch of stuff and creates internal list 
          list = 

    def bar(self):
         # does a bunch of stuff and uses list

I would like to write a test for method bar here which I guess must be called through an object of class abc. I can mock list array for this test, but cannot understand how to avoid the call to foo().