How to mock functions that are inside a tested file ?

[lesnake]

Hello,
In a source file, I have function that only call functions declared and defined outside this source file. Mocking these functions is easy and straight forward (thanks for the job, btw).
In this source file, some functions are calling functions also defined inside the same file.
How can I mock these ?

Here is a foobar example :
inside foo.c

#include "bar.h"
#include "foo.h"

foo_init
{
  bar_init()
}

foo_sub1
{
  bar_sub1
}

foo_sub2
{
  bar_sub2
}

foo_main
{
  foo_init

  foo_sub1

  foo_sub2
}

inside test_foo.c

#include "mockbar.h"
#include "mockfoo.h"

test_foo_init()
{
  mockbar_init()
  foo_init()
}

test_foo_sub1
{
  mockbar_sub1()
  foo_sub1()
}

test_foo_sub2
{
  mockbar_sub2()
  foo_sub2()
}

//This function need to access to mocked versions of foo_init, foo_sub1, foo_sub2 
// But also to unmocked version of foo_main
// This is where I am stuck
test_foo_main
{
  mockfoo_init()

  mockfoo_sub1()

  mockfoo_sub2()

  // unmocked
  foo_main()
}