test for #1711

Tests/test_image_resample.py

@@ -0,0 +1,18 @@
+from helper import unittest, PillowTestCase, hopper
+from PIL import Image
+
+class TestImagingCoreResize(PillowTestCase):
+    #see https://github.com/python-pillow/Pillow/issues/1710
+    def test_overflow(self):
+        im = hopper('L')
+        xsize = 0x100000008 // 4
+        ysize = 1000 # unimportant
+        try:
+            im.im.resize((xsize, ysize), Image.LINEAR) # any resampling filter will do here
+            self.fail("Resize should raise MemoryError on invalid xsize")
+        except MemoryError:
+            self.assertTrue(True, "Should raise MemoryError")
+
+
+if __name__ == '__main__':
+    unittest.main()