#15036: Make a repeated changes and flushes work with single-file mailboxes
diff --git a/Lib/test/test_mailbox.py b/Lib/test/test_mailbox.py
index 480d586..6ebd1a2 100644
--- a/Lib/test/test_mailbox.py
+++ b/Lib/test/test_mailbox.py
@@ -386,6 +386,17 @@
# Write changes to disk
self._test_flush_or_close(self._box.flush, True)
+ def test_popitem_and_flush_twice(self):
+ # See #15036.
+ self._box.add(self._template % 0)
+ self._box.add(self._template % 1)
+ self._box.flush()
+
+ self._box.popitem()
+ self._box.flush()
+ self._box.popitem()
+ self._box.flush()
+
def test_lock_unlock(self):
# Lock and unlock the mailbox
self.assertFalse(os.path.exists(self._get_lock_path()))