test_mingw32ccompiler.py
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import shutil
import subprocess
import sys
import pytest
from numpy.distutils import mingw32ccompiler
@pytest.mark.skipif(sys.platform != 'win32', reason='win32 only test')
def test_build_import():
'''Test the mingw32ccompiler.build_import_library, which builds a
`python.a` from the MSVC `python.lib`
'''
# make sure `nm.exe` exists and supports the current python version. This
# can get mixed up when the PATH has a 64-bit nm but the python is 32-bit
try:
out = subprocess.check_output(['nm.exe', '--help'])
except FileNotFoundError:
pytest.skip("'nm.exe' not on path, is mingw installed?")
supported = out[out.find(b'supported targets:'):]
if sys.maxsize < 2**32:
if b'pe-i386' not in supported:
raise ValueError("'nm.exe' found but it does not support 32-bit "
"dlls when using 32-bit python. Supported "
"formats: '%s'" % supported)
elif b'pe-x86-64' not in supported:
raise ValueError("'nm.exe' found but it does not support 64-bit "
"dlls when using 64-bit python. Supported "
"formats: '%s'" % supported)
# Hide the import library to force a build
has_import_lib, fullpath = mingw32ccompiler._check_for_import_lib()
if has_import_lib:
shutil.move(fullpath, fullpath + '.bak')
try:
# Whew, now we can actually test the function
mingw32ccompiler.build_import_library()
finally:
if has_import_lib:
shutil.move(fullpath + '.bak', fullpath)