PYTHON -c "import a; assert a.__file__.rstrip('co').endswith('.py'), a.__file__; a.test()"
PYTHON setup.py build_ext --inplace
PYTHON -c "import a; assert not a.__file__.rstrip('co').endswith('.py'), a.__file__; a.test()"

######## setup.py ########

from Cython.Build.Dependencies import cythonize

from distutils.core import setup

setup(
    ext_modules = cythonize("a.py"),
    )

######## a.pxd ########

cimport cython

cdef class ExtType:
    @cython.final
    cdef int final_func(self)

@cython.final
cdef class FinalExtType:
    cdef int func(self)

@cython.final
cdef class FinalExtSubType(ExtType):
    cdef int func(self)

cdef class NonFinalSubType(ExtType):
    cdef int func(self)


######## a.py ########

import cython

class ExtType(object):
    @cython.test_assert_path_exists("//CFuncDefNode[@entry.is_final_cmethod=True]")
    def final_func(self):
        return 1

class FinalExtType(object):
    @cython.test_assert_path_exists("//CFuncDefNode[@entry.is_final_cmethod=True]")
    def func(self):
        return 2

class FinalExtSubType(ExtType):
    @cython.test_assert_path_exists("//CFuncDefNode[@entry.is_final_cmethod=True]")
    def func(self):
        return 3

class NonFinalSubType(ExtType):
    @cython.test_assert_path_exists("//CFuncDefNode[@entry.is_final_cmethod=True]")
    @cython.final
    def func(self):
        return 4


def test():
    assert ExtType().final_func() == 1
    assert FinalExtSubType().final_func() == 1
    assert NonFinalSubType().final_func() == 1

    assert FinalExtType().func() == 2
    assert FinalExtSubType().func() == 3
    assert NonFinalSubType().func() == 4