Pillow/Tests/check_webp_leaks.py

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2015-02-23 12:24:33 +03:00
from helper import unittest, PillowTestCase
import sys
from PIL import Image
from io import BytesIO
# Limits for testing the leak
mem_limit = 16 # max increase in MB
iterations = 5000
test_file = "Tests/images/hopper.webp"
@unittest.skipIf(sys.platform.startswith('win32'), "requires Unix or MacOS")
class TestWebPLeaks(PillowTestCase):
def setUp(self):
try:
from PIL import _webp
except ImportError:
self.skipTest('WebP support not installed')
def _get_mem_usage(self):
from resource import getpagesize, getrusage, RUSAGE_SELF
mem = getrusage(RUSAGE_SELF).ru_maxrss
return mem * getpagesize() / 1024 / 1024
def test_leak_load(self):
with open(test_file, 'rb') as f:
im_data = f.read()
start_mem = self._get_mem_usage()
for count in range(iterations):
with Image.open(BytesIO(im_data)) as im:
im.load()
mem = (self._get_mem_usage() - start_mem)
self.assertLess(mem, mem_limit, msg='memory usage limit exceeded')
if __name__ == '__main__':
unittest.main()