bpo-24658: check with bigmemtest

Author: matrixise

Lib/test/test_largefile.py

@@ -45,7 +45,8 @@ def tearDownClass(cls):
             raise cls.failureException('File was not truncated by opening '
                                        'with mode "wb"')
 
-    def test_large_read(self):
+    @bigmemtest(size=_2G, memuse=1)
+    def test_large_read(self, _size):
         # bpo-24658: Test that a read greater than 2GB does not fail.
         with self.open(TESTFN, "rb") as f:
             self.assertEqual(len(f.read()), size + 1)