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smoketests: add a test for the limited API #150

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smoketests: add a test for the limited API #150

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47 changes: 41 additions & 6 deletions mingw_smoketests.py
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Original file line number Diff line number Diff line change
Expand Up @@ -265,6 +265,12 @@ def test_site(self):
self.assertEqual(len(site.getsitepackages()), 1)

def test_c_ext_build(self):
self._test_c_ext_build(False)

def test_c_ext_build_limited_api(self):
self._test_c_ext_build(True)

def _test_c_ext_build(self, py_limited_api):
import tempfile
import sys
import subprocess
Expand All @@ -279,32 +285,47 @@ def test_c_ext_build(self):
"""\
from setuptools import setup, Extension

if %(py_limited_api)s:
ext = Extension(
'cwrapper',
py_limited_api=True,
define_macros=[('Py_LIMITED_API', '0x03060000')],
sources=['cwrapper.c'])
else:
ext = Extension(
'cwrapper',
sources=['cwrapper.c'])

setup(
name='cwrapper',
version='1.0',
ext_modules=[
Extension(
'cwrapper',
sources=['cwrapper.c']),
],
ext_modules=[ext],
)
"""
""" % {"py_limited_api": py_limited_api}
)
)

with Path(tmppro, "cwrapper.c").open("w") as f:
f.write(
textwrap.dedent(
"""\
#include <Python.h>
#include <windows.h>
static PyObject *
helloworld(PyObject *self, PyObject *args)
{
printf("Hello World\\n");
Py_RETURN_NONE;
}
static PyObject *
islimited(PyObject *self, PyObject *args)
{
return PyBool_FromLong(GetModuleHandleA("libpython3.dll") != NULL);
}
static PyMethodDef
myMethods[] = {
{ "helloworld", helloworld, METH_NOARGS, "Prints Hello World" },
{ "islimited", islimited, METH_NOARGS, "Returns True if the limited API is used" },
{ NULL, NULL, 0, NULL }
};
static struct PyModuleDef cwrapper = {
Expand All @@ -323,6 +344,16 @@ def test_c_ext_build(self):
"""
)
)

if py_limited_api:
with Path(tmppro, "setup.cfg").open("w") as f:
f.write(textwrap.dedent(
"""\
[bdist_wheel]
py_limited_api=cp36
"""
))

subprocess.check_call(
[sys.executable, "-c", "import struct"],
)
Expand All @@ -347,6 +378,10 @@ def test_c_ext_build(self):
subprocess.check_call(
[sys.executable, "-c", "import cwrapper"],
)
# Make sure the resulting extension uses the limited API, or not
subprocess.check_call(
[sys.executable, "-c", f"import cwrapper; assert cwrapper.islimited() == {py_limited_api}"],
)



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