From: Nadeem Vawda <nadeem.vawda@gmail.com>
Date: Sun, 26 Feb 2012 22:42:58 +0000 (+0200)
Subject: Issue #13873: Fix crash in test_zlib when running on a small (<4GB) tmpfs.
X-Git-Tag: v3.3.0a1~51^2^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=05a4dd83af7c9b7feae88abc6b8be21924e8a4a0;p=python

Issue #13873: Fix crash in test_zlib when running on a small (<4GB) tmpfs.
---

diff --git a/Lib/test/test_zlib.py b/Lib/test/test_zlib.py
index dffa2ca0da..60081e241c 100644
--- a/Lib/test/test_zlib.py
+++ b/Lib/test/test_zlib.py
@@ -66,24 +66,11 @@ class ChecksumTestCase(unittest.TestCase):
 # Issue #10276 - check that inputs >=4GB are handled correctly.
 class ChecksumBigBufferTestCase(unittest.TestCase):
 
-    def setUp(self):
-        with open(support.TESTFN, "wb+") as f:
-            f.seek(_4G)
-            f.write(b"asdf")
-            f.flush()
-            self.mapping = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
-
-    def tearDown(self):
-        self.mapping.close()
-        support.unlink(support.TESTFN)
-
-    @unittest.skipUnless(mmap, "mmap() is not available.")
-    @unittest.skipUnless(sys.maxsize > _4G, "Can't run on a 32-bit system.")
-    @unittest.skipUnless(support.is_resource_enabled("largefile"),
-                         "May use lots of disk space.")
-    def test_big_buffer(self):
-        self.assertEqual(zlib.crc32(self.mapping), 3058686908)
-        self.assertEqual(zlib.adler32(self.mapping), 82837919)
+    @bigmemtest(size=_4G + 4, memuse=1, dry_run=False)
+    def test_big_buffer(self, size):
+        data = b"nyan" * (_1G + 1)
+        self.assertEqual(zlib.crc32(data), 1044521549)
+        self.assertEqual(zlib.adler32(data), 2256789997)
 
 
 class ExceptionTestCase(unittest.TestCase):